Experimental Stress-strain Curves Research Articles

A unified constitutive relationship with the internal state variables of grain evolution behavior and the application in numerical simulation of cross wedge rolling

Controlling the grain size is an essential issue in the metal plastic working processes. Based on the consensus view that grain boundaries are impassable borders for dislocations and that the number of dislocations within a grain affects the stress builds up among the adjacent grains, altering grain size has a great influence on the post-forming mechanical properties of the deformed workpieces. In the present research, the deformation behaviors of 20CrMoH, a typical hardenability steel, are investigated and the microstructure evolution of grain growth experiencing heat load and grain refinement under deformation load is also uncovered. According to the experimental stress-strain curves and grain size variation data, a set of internal variable constitutive equations are established, in which the material constants are calibrated by a genetic optimization algorithm. Comparing the predicted curves with the experimental values, it can be concluded that the constitutive equations can accurately reproduce the thermal deformation behaviors and grain size variation of the steel. The correlation coefficient of the calculated and experimental values is 0.9861, and the average relative error approximates 4%. The unified constitutive equations are compiled into a commercial finite element software with the help of user-defined subroutine interfaces. The simulation results demonstrate that the maximum accuracy error of a hollow shaft size is about 10%, and the error in the average grain size is 12.1%. It is confirmed that the internal variable constitutive equations describing the evolution of grain size established in this paper are suitable for the numerical simulation of the bulk-forming process.

Numerical simulation of non-linear loading–unloading hysteresis behavior of blood clots

The stress–strain characteristics of a clot during loading/unloading mechanical cycles are significant features to assess the underlying mechanisms of thrombectomy, especially when multiple thrombectomy attempts are required. We investigated a damage model to predict loading/unloading response of clots. To study the validity of the model, we tested theoretical models to reproduce the experimentally obtained mechanical characteristics of clots under various conditions. Three types of clot analogs with different red blood cell (RBC) compositions were prepared. Cylindrical clot analogs were formed for the tensile and compression tests. Loading/unloading tests at 80% of strain were conducted, where the material parameters were determined by fitting the results to a theoretical curve combining the damage model and the elasto-plastic constitutive model. Through the computation for theoretical curves, unique characteristics of clots were revealed such that the hysteresis loss rate did not change by varying RBC contents, except for the clot created with 0% RBC composition, under compressive loading. In addition, the plastic strain decreased as the RBC content decreased under tensile loading, whereas it increased as the RBC content decreased under compressive loading. A three-dimensional finite element method (FEM) was employed with the determined parameters. The FEM could accurately reproduce the experimental stress–strain curves for all types of clot analogs and for both loading types up to a strain of 80%. The results indicate that the theoretical model which incorporates and combines the damage model and the elasto-plastic constitutive model is applicable to predict the non-linear stress–strain behavior of clots under loading and unloading.

Study on Basalt Fiber Reinforced Concrete: Mechanical and Microstructural Properties and Analytical Modelling of Compressive Stress-Strain Curves

This paper aims to present compressive stress-strain behaviour and develop relationships for peak stress, strain at peak stress, and material parameter with the modified reinforcing index for analytical modelling of basalt fiber reinforced concretes (BFRC’s) stress-strain curves. For this, three different strengths of BFRCs were developed i.e., normal-strength-BFRC, medium-strength-BFRC and high-strength-BFRC, each strength of BFRCs contains 0%, 0.1%, 0.2%, 0.3%, 0.4%, and 0.5% of basalt fibers (BFs). The effect of BFs on mechanical properties, compressive stress-strain behaviour of the BFRCs mixes were studied experimentally. The energy absorption capacity, peak stress, and strain at peak stress of BFRCs have also been studied analytically. Scanning electron microscope analysis was performed to examine microstructural characteristics of BFRCs. The test results indicated that the maximum compressive, flexural, and split tensile strengths and better stress-strain behaviour exhibited at the addition of 0.3% of BFs in all three strengths of BFRCs. Using developed relationships, analytically modelled stress-strain curves closely represented the realistic stress-strain behaviour of BFRCs and fit well with the experimental stress-strain curves. In addition, in literature, the proposed expressions between the material parameter and reinforcing index for analytical modelling of steel FRC's stress-strain curves could not accurately predict the experimental stress-strain curves of BFRCs.

Mechanical and Durability Properties of Green Concrete

This research is designed to assess the durability characteristics of green concrete and its compressive and flexural behavior. It measures the possibility of using by product materials in the concrete mix as cement partial replacement. Thus, the experimental compressive stress-strain curves are measured for the cylinder specimens made with green concrete. Furthermore, the durability of green concrete is evaluated using the thaw-freeze test and ultrasonic pulse velocity test. The flexural behavior of green concrete is also investigated. Prismatic beams and cylinder specimens are cast from different types of green concrete made from different by product materials including fuel ash, silica fume, and iron filings using two different percentages 15% and 20% as cement partial replacement. The prismatic specimens are cured over 550 days and then exposed to 60 thaw-freeze cycles. Although concrete made with pulverized fuel ash has the highest compressive strength at 120 days, it has the worst durability characteristics when exposed to 60 iterative thaw/freeze cycles at 550 days. Concrete made with iron filings is more durable than other specimens are. It is recommended using iron filings, pulverized fuel ash and silica fume in the concrete mix. However, iron filings are highly recommended for durable concrete.

Study on Flow Stress Model of AA5005 Material

Due to the continuous emergence of new alloys and the improvement of basic research requirements for aluminum alloy, researchers need to further study the flow constitutive relationship of new aluminum alloys. This paper used Model MTS-810 tensile machine to conduct tensile tests on AA5005 aluminum alloy at temperature of 360°C and strain rate of . Hollomon model, Swift model, Voce model, Voce+Voce model were used to compare the fitting accuracy with the experimental stress-strain curves, and the fitting parameters required by each formula were obtained from the fitting results, so as to obtain the constitutive model of AA5005 aluminum alloy. The Voce+Voce model which with more fitting freedom degree, lower flow stress increasing rate and saturation rate is most suitable to describe flow stress relation of aluminum alloy AA5005.

Numerical investigations on the hybrid effect and deformation mechanism of TiB2p and TiBw reinforced Cu composites prepared by in-situ mixing casting

In this paper, a novel numerical modeling method for multiphase and multiscale Cu matrix composites (CMCs) is constructed from material characteristics, complex structure reconstruction, interface behavior characterization, and comprehensive mechanical properties prediction. On this basis, two 3D finite element models of (TiB2p + TiBw)/Cu composites and TiB2p/Cu composites are established respectively according to the actual microstructure of CMCs. Brittle fractures of TiB2p and TiBw, ductile fracture of Cu matrix, and interface behavior are taken into account in the model to predict the cracking evolution process of CMCs. The consistency with the experimental stress-strain curve verifies the reliability of the models. The deformation behavior and fracture mechanism of (TiB2p + TiBw)/Cu composites were studied. By analyzing the stress and strain distributions of reinforcements, interface and the evolution of cracks of matrix in (TiB2p + TiBw)/Cu composites, the model reveals hybrid effects of particle and whisker on the mechanical behavior in composites. The stress concentration factors are used to quantify the bearing capacity of particle and whisker in hybrid composites. The interface damage rate and the damage accumulation of matrix of the two kinds of composites are also discussed. A relationship between the macroscopic mechanical behavior and microstructure of (TiB2p + TiBw) reinforced CMCs is investigated. This work can provide useful guidance for the optimal design and industrial application of CMCs.

Study on the nonlinear deformation characteristics and constitutive model of cemented tailings backfill considering compaction hardening and strain softening

The deformation characteristics of the cemented tailings backfill (CTB) has a significant influence on the stability of mine stope and surface subsidence after filling mining. An uniaxial compression experiment of the CTB containing different cement-tailings ratios (c/t) has been performed and it shows that the CTB has an obvious compaction hardening in the initial compaction stage and strain softening at the plastic yield stage. However, these nonlinear deformation characteristics of CTB are not fully understood in the previous studies. In this research, considering the nonlinear deformation characteristics, a complete constitutive model was proposed for the CTB based on the experimental stress–strain curves. This constitutive model has been programmed into FLAC3D to obtain the law of surface subsidence and assess the safety of the concentrator if the backfill method is adopted. In addition, a physical model experiment of filling mining is also carried out at the same condition. The results of these two simulation experiments show that the surface subsidence is negatively correlated with the distance between the concentrator and the collapse pit, and the maximum subsidence is less than 90 mm. Therefore, the filling mining method can effectively guarantee the safety of concentrator. This study provides a better understanding of the deformation characteristics of CTB and it also contributes to the underground filling technology of using CTB.

Micromechanical Model for Predicting the Tensile Properties of Guadua angustifolia Fibers Polypropylene-Based Composites.

In this paper, the one-dimensional tensile behavior of Guadua angustifolia Kunth fibre/polypropylene (PP+GAKS) composites is modeled. The classical model of Kelly–Tyson and its Bowyer–Bader’s solution is not able to reproduce the entire stress–strain curve of the composite. An integral (In-Built) micromechanical model proposed by Isitman and Aykol, initially for synthetic fiber-reinforced composites, was applied to predict micromechanical parameters in short natural fiber composites. The proposed method integrates both the information of the experimental stress-strain curves and the morphology of the fiber bundles within the composite to estimate the interfacial shear strength (IFSS), fiber orientation efficiency factor , fiber length efficiency factor and critical fiber length . It was possible to reproduce the stress-strain curves of the PP+GAKS composite with low residual standard deviation. A methodology was applied using X-ray microtomography and digital image processing techniques for the precise extraction of the micromechanical parameters involved in the model. The results showed good agreement with the experimental data.

Numerical Investigation of the Infill Rate upon Mechanical Proprieties of 3D-Printed Materials.

The paper proposes a novel method of numerical simulation of the fused deposition molding 3Dprinted parts. The single filaments are modeled by a script using the G-code of the 3D printer. Based on experimental evaluation of the cross-sectional geometry of a printed tensile specimen, the connection between the filaments is determined and the flattening effect of the filaments can be counted. Finite element (FE) simulations considering different element lengths were validated by experimental tests. The methodology allows, on one hand, numerical estimation of the true cross-sectional area of a specimen and correction of the experimental stress-strain curves and, on the other hand, accurate determination of the E-modulus of a printed tensile specimen with different deposition densities (20%, 40%, 60%, 80% and 100% infill rate). If the right method to connect the single filaments is established and validated for a 3D printer, the mechanical properties of the 3D specimens can be predicted without physical tensile test, only using FE method, which will allow the designers to print out the parts with variable infill rate and tunable stiffness only after the FE result are suitable for their needs, saving considerably materials and time.

Development of an Analytical Model to Predict Stress–Strain Curves of Short Fiber-Reinforced Polymers with Six Independent Parameters

Mechanical properties of fiber-reinforced polymers are sensitive to environmental influences due to the presence of the polymer matrix but inhomogeneous and anisotropic due to the presence of the fibers. Hence, structural analysis with mechanical properties as a function of loading, environment, design, and material condition produces more precise, reliable, and economic structures. In the present study, an analytical model is developed that can predict engineering values as well as non-linear stress–strain curves as a function of six independent parameters for short fiber-reinforced polymers manufactured by injection molding. These parameters are the strain, temperature, humidity, fiber content, fiber orientation, and thickness of the specimen. A three-point test matrix for each independent parameter is used to obtain experimental data. To insert the effect of in-homogenous and anisotropic distribution of fibers in the analytical model, microCT analysis is done. Similarly, dynamic mechanical thermal analysis (DMTA) is done to insert the viscoelastic effect of the material. The least mean square regression method is used to predict empirical formulas. The standard error of regression for the fitting of the model with experimental stress–strain curves is closely controlled below 2% of the stress range. This study provides user-specific material data for simulations with specific material, loading, and environmental conditions.

Deformational behavior of self-compacting concrete containing recycled aggregate, slag cement and green powders under compression and bending: Description and prediction adjustment

The high fine-aggregate content of Self-Compacting Concrete (SCC) means that its deformational behavior differs from that of vibrated concrete. SCC performance is further altered when industrial by-products are used as raw materials in those fractions. In this paper, the aim is to analyze and to model the deformational behavior under compression and bending of SCC containing 100% coarse and 0%, 50%, and 100% fine Recycled Aggregate (RA), limestone and RA green aggregate powders sized 0/0.5 mm, and Ground Granulated Blast-furnace Slag (GGBS) cement. After the fresh and mechanical characterization of the 18 SCC mixes that were produced, their compressive stress-strain and bending load-deflection curves were determined by continuously recording the applied load and the strain/deflection values of the SCC test specimens. 100% coarse RA yielded deformability levels in accordance with international standards, while higher fine RA contents increased deformation under compression and reduced it under flexural stress. SCC stiffness increased when GGBS was added, due to the adjustment of the proportion of cementitious matrix, while the use of limestone powder and, especially, RA powder had the opposite effect. Both compressive strain and flexural deflection were underestimated with existing theoretical models. However, the incorporation in the models of both exponential correction coefficients, dependent on the fine RA content, and partial adjustment coefficients, dependent on the types of cement and aggregate powder, produced optimal fits with the experimental stress-strain and load-deflection curves. In view of the deformational behavior, which was successfully modelled with maximum deviations of ±10%, fine RA may be used in combination with GGBS and limestone powder, although it is recommended that fine RA should not exceed proportions of 50%.

An investigation into Arrhenius type constitutive models to predict complex hot deformation behavior of TC4 alloy having bimodal microstructure

The purpose of this study was to determine the plastic deformation behavior of TC4 alloy having bimodal microstructure at hot forming conditions and establish a suitable constitutive model. The bimodal microstructure was obtained by plate die forging at 985 °C to a deformation of 40% and then annealing at 720 °C for 1 h followed by air cooling. Quasi-static tensile tests were performed at temperatures ranging from 750 to 900 °C and strain rates of 0.0001–0.1 s−1. The experimental stress-strain curves revealed that the alloy exhibited complex deformation behavior with considerable strain hardening, dynamic recovery, and continuous dynamic recrystallization. The processing map is established to delineate the safe and unsafe thermomechanical conditions for material hot forming that revealed the existence of superplasticity at 0.0001 s−1 and 750–900 °C, DRX at 0.001 s−1 and 800–900 °C, and flow instabilities at 0.1–0.01 s−1 and 800–850 °C. Modified Arrhenius type constitutive models with strain compensated using polynomial equation (PSCAM) and exponential equation (ESCAM) were established to predict the complex deformation behavior of the alloy. Also, a novel optimization method utilizing an evolutionary algorithm (EA) and generalized reduced gradient (GRG) was employed to establish an optimized polynomial strain compensated Arrhenius type constitutive model (OPSCAM). The predictability of the three established models is evaluated and compared during strain hardening and dynamic softening of the material. The correlation coefficients of ESCAM, PSCAM, and OPSCAM were 0.98, 0.99, and 0.99, respectively, showing a good correlation for the three models. Percentage average absolute relative error for the three models is 13.76%, 9.66%, and 9.14%, respectively, during strain hardening and 12.40%, 8.41%, and 6.78%, respectively, during dynamic softening. The study showed that OPSCAM could adequately predict the deformation behavior of TC4 alloy with bimodal microstructure during both hardening and softening regions and could be used to simulate the hot forming process.

Damage ratio strength criterion for cast iron

According to the assumption of small strains and total strain decomposition of cast iron, the expressions of the inelastic principal strain rate and relative energy dissipation rate of cast iron are derived, and the parameters of the tensile and compressive damage ratio of cast iron in the inelastic phase are proposed. Based on the least energy consumption principle, combined with the above expressions and parameters, the damage ratio strength criterion for cast iron under biaxial stress states is established. The damage ratio variable expression of the cast iron damage ratio strength criterion considering the effect of Lode angle is proposed. Furthermore, the values of the damage ratio variable are verified by the experimental stress–strain curves of cast iron under uniaxial stress states. By comparing the predicted values to 104 experimental data points of cast iron specimens, the failure envelopes of the proposed criterion can represent the failure behavior of cast iron under biaxial loading conditions. To facilitate the practical application in engineering, the further simplified expression of the four-parameter damage ratio strength criterion for cast iron under biaxial stress states is suggested and those empirical parameters are recommended. Compared with some main strength criteria, the simplified criterion is in better agreement with the experimental results under every stress state.

New strength–strain model and stress–strain relationship for square and rectangular concrete columns confined with CFRP wraps

The aim of this paper is to develop new models for the prediction of the ultimate strength, the ultimate strain, as well as the axial stress–strain relationship of square and rectangular concrete columns confined with carbon fiber reinforced polymer (CFRP) wraps. An experimental database covering 360 specimens with an unconfined compressive strength ranging from 11 to 94 MPa was collected from previous studies. In addition, the performance of eight existing strength and strain models was evaluated using the collected data. In this study, new strength–strain model considering the cross-sectional aspect ratio and the shape coefficient as a function of the depth of the rectangular cross-section was proposed using linear regression analysis. The proposed model provides a better correlation and a good fit with the experimental data compared to the other existing models. On the other hand, a new stress–strain relationship describing the axial behavior of square and rectangular columns confined with CFRP wraps was proposed, in which the parameters of confinement, such as the corner radius and the depth of the rectangular section were considered. The proposed relationship was validated with a set of experimental stress–strain curves and compared with four other existing models. The results showed that the proposed relationship provides good accuracy and better predictions over the existing models.

Effect of strain rate and load orientation on cyclic response of anisotropic polyurethane foam

Anisotropic cellular materials, such as polymeric foams, play an important role in structures subjected to cyclic loadings. The present paper provides an experimental investigation of the mechanical behavior of an anisotropic polyurethane foam subjected to cyclic compressive loadings under two perpendicular orientations: the rising and perpendicular directions. The foam samples are loaded under three different strain rates and various deformations. The experimental results are presented in terms of elasticity modulus, maximal compressive stress, effective energy absorption capacity, and residual strain. It is proved that the investigated polyurethane foam presents a macroscopic mechanical anisotropy caused by microscopic cell elongation in the foaming direction. Moreover, it is demonstrated that the mechanical behavior of the foam is fully influenced by both deformation rates and imposed strains. The experimental stress–strain curves are modelized using an empirical model considering an adjustable modulus of elasticity. The analytical results show a good agreement with the experiments.

A Design-Oriented Stress-Strain Constitutive Model for Clay-Brick Masonry Columns Confined by FRP

Experimental tests proved that the external confinement of masonry columns through Fiber-Reinforced Polymers (FRP) induces increment of axial strength and ductility. Contrary to FRP-confined concrete, for which reliable unified theoretical stress-strain models are available in literature or included in the codes, to develop easy-to-use constitutive models valid for whatever type masonry represents a difficult challenge. In fact, several parameters influence the axial stress-strain response of confined masonry, such as the relative mortar-to-stones strength, masonry texture, deformation capacity of materials, type of reinforcement ad its arrangement. In this paper, a design-oriented stress-strain model devoted to describe the compressive behavior of FRP-confined clay-brick masonry columns is presented. The main scope of the research consists of providing an easy-to-use predictive model, applicable both in the research field and design practice. The stress-strain response of the confined masonry has been idealized in a parabola-rectangular behavior described by Lam and Teng’s equations - originally developed for FRP-confined concrete - adapted to masonry elements. The equations are ruled by the mechanical properties of confined and unconfined masonry, those of composite material and by a parameter that takes into account the dispersion of the experimental data (i.e., variability of materials properties, different stone arrangements and masonry textures). The entire stress-strain behavior has been calibrated by means of the least-squares optimization criterion, based on a sufficient number of experimental results available in the literature. Comparisons between experimental and theoretical stress-strain curves show good accordance of the results. The design-oriented model is able to capture the experimental response of the confined masonry, in terms of initial elastic stiffness, ductility ad maximum confinement pressure.

Evolution of Anand Parameters for Thermally Aged Sn-Ag-Cu Lead-Free Alloys at Low Operating Temperature

Abstract In extreme environmental applications, such as aerospace and automotive, electronics may endure high or low operating temperatures during service, handling, and storage. An electronic assembly may experience strain rates of 1–100 per sec of strain and ambient temperatures of –65 to +200 °C. Electronic assembly's temperature depends mainly on location, energy dissipation, and thermal architecture. Electronic assemblies in automotive applications may be located underhood, on engine, on-transmission, and or in wheel well. Study of property evolution of solders used for interconnection is important for assurance of reliability. Degradation in material properties for lead-free solder alloys can be caused by change in microstructure due to variation in temperatures. There is need for data on the effect of operating period and operating conditions on the material properties. Addition of dopants in Sn-Ag-Cu (SAC) alloys has been shown to improve mechanical properties and minimize deterioration due to aging at lower strain rates. SAC-Q is formulated with Sn-Ag-Cu with addition of Bi (SAC+Bi). It has been observed that adding Bismuth (Bi) to SAC alloy can play an important role to make the solder alloy resistant to aging-induced degradations. In author's prior research the evolution of Anand parameters and materials properties for SAC solder (SAC105, SAC305, and SAC-Q) at high temperatures and high strain rates has been studied. However, data on thermally aged SAC solder alloys at high strain rate levels at low operating temperatures are not available in published literature. In this paper, materials characterization of thermally aged SAC (SAC105 and SAC-Q) solder at low operating temperatures (−65 °C to 0 °C) and at high strain rates (10–75 per sec) has been studied. Stress–strain curves have been measured at low operating temperatures using impact hammer-based tensile tests with cooling chamber. The fabricated SAC lead-free solder specimen was isothermally aged up to 6 months at 50 °C before testing. Anand viscoplastic model has been used to compute nine Anand parameters to describe the material constitutive behavior. Anand Model parameters evolution due to thermal aging has been studied for SAC solders. The computed nine Anand parameters from experimental data then were used to simulate the tensile test to predict the stress–strain curve and compared to experimental stress–strain curves to verify the accuracy of the model. A good correlation was found between experimental data and Anand-predicted data.

Establishment and Experimental Verification of Stress-Temperature Coupled Damage Model of Warm Frozen Soil

Under the background of rising environmental temperature, the state of warm frozen soil near the phase transition is extremely unstable. In order to explore the relationship between temperature and mechanical properties of warm frozen soil, a damage model of warm frozen soil structure under the coupling of stress and temperature is established based on the strain equivalent theory of damage mechanics. Based on the Mohr-Coulomb criterion, the nominal stress is used to represent the stress damage of frozen soil elements, the initial elastic modulus is used to represent the temperature damage, and a composite damage factor is introduced to describe their coupled relationship. Through a triaxial compression experiment of frozen soil, the experimental data and stress-strain curve are obtained. The full-fitting method based on the experimental data (method 1) and the semitheoretical semifitting method based on the characteristic points of the stress-strain curve (method 2) are used to obtain the shape parameters and scale parameters of the stress-temperature coupled damage model corresponding to different fitting methods. Based on the triaxial compression tests of frozen sand and frozen silty clay, the reliability of the stress-temperature coupled damage model results obtained by the two parameter determination methods under the conditions of strain softening and strain hardening is verified. The results show that both methods are applicable under the condition of strain softening and strain hardening and method 2 is better than method 1 under the condition of strain softening. Compared with the prediction results of the single stress damage model, the stress-temperature coupled damage model can effectively reduce the influence of the parameter estimation error on the results and improve the overall stability of the model.

The Behavior of Hybrid Fiber-Reinforced Concrete Elements: A New Stress-Strain Model Using an Evolutionary Approach

Several stress-strain models were used to predict the strengths of steel fiber reinforced concrete, which are distinctive of the material. However, insufficient research has been done on the influence of hybrid fiber combinations (comprising two or more distinct fibers) on the characteristics of concrete. For this reason, the researchers conducted an experimental program to determine the stress-strain relationship of 30 concrete samples reinforced with two distinct fibers (a hybrid of polyvinyl alcohol and steel fibers), with compressive strengths ranging from 40 to 120 MPa. A total of 80% of the experimental results were used to develop a new empirical stress-strain model, which was accomplished through the application of the particle swarm optimization (PSO) technique. It was discovered in this investigation that the new stress-strain model predictions are consistent with the remaining 20% of the experimental stress-strain curves obtained. Case studies of hybrid–fiber–reinforced concrete constructions were investigated in order to better understand the behavior of such elements. The data revealed that the proposed model has the highest absolute relative error (ARE) frequencies (ARE 10%) and the lowest absolute relative error (ARE > 15%) frequencies (ARE > 15%).

Effects of configuration parameters on the deformation and fracture behaviors of TiB2/Cu composites with network structure: A numerical approach using an enhanced finite element model

In order to reflect the real network composites with a hard phase TiB2 surrounded by a soft phase Cu, a developed large crystal-like cell model which closer to the real cell structure is proposed in this paper. Micro-geometric features of network TiB2/Cu composites are extracted based on the actual SEM, and a stochastic synthesis algorithm is adopted to reconstruct network structure. Based on MATLAB, a 3D network model of TiB2/Cu composites is established through Voronoi algorithm. By using finite element method, the effects of configuration parameters including TiB2 particle wall thicknesses, matrix phase sizes and matrix phase morphology on the deformation and fracture behaviors in network TiB2/Cu composites are investigated, and the mechanical properties of the composites are predicted. Three failure modes including brittle fracture of particle wall, ductile damage of matrix and traction-separation law of interface are introduced in the proposed models. The experimental stress–strain curves were implemented to verify the simulation results. The results show that the trend is in good agreement and the simulation results are stable and reliable. The comprehensive mechanical properties of network composites are assessed by yield strength, elastic modulus, elongation and tensile strength. The equivalent stress and stress concentration factor of the particle wall, brittle fracture process of network, interfacial debonding, crack damage and equivalent plastic strain of matrix are quantitatively presented. It is illustrated that the bearing capacity of network TiB2/Cu composites is determined by Cu matrix, TiB2 particle wall and interface. A macro and micro structure-properties relationship of network configuration composites is established in this paper. This work provided reference and guidance for the configuration design of the network composites in the experiment.