Deformable Part Research Articles

Вплив шунтування високотемпературних тензорозісторів на точність виміру статичних деформацій елементів ГТД

The development of gas turbine engines (GTE), for various purposes, is inextricably linked with an increase in their main characteristics. Simultaneously, the parameters of the working fluid increase, in particular, the temperature of the gas flow and the intensity of loads on structural elements with an increasing frequency of rotation of the rotors. The strength reliability of highly heated GTE elements is a factor that determines the life of the engine as a whole. The most common cases of damage to GTE elements are caused by static stresses, and mainly relate to the blade apparatus, compressor and gas turbine housings, combustion chambers and rotor elements operating in the temperature range of 200–750 °C. Errors in measuring static deformations of parts are usually associated with insufficient compensation for the temperature increment of resistance by the sensitive element (SE) of the strain gauge and with the occurrence of shunt currents between the SE and the body of the part through a binder insulator. The change in the electrical resistance of the strain gauge SE is perceived by the measuring system as an imaginary deformation. The measurement error due to shunting increases significantly with an increase in the temperature of the part under study, since this significantly reduces the specific electrical resistance of the binder insulator. A strain gauge sensor with two sensitive elements is considered in this work. The lower CE of the strain gauge sensor is located in the insulator-connector directly in the vicinity of the body of the part and perceives its main deformation. The upper Euro is located above the lower. The main axes of the elements are rotated relative to each other by 90 ° C and plays the role of temperature-compensating element and at the same time registers the transverse deformation of the part. An electrical model of the potential distribution in a strain gauge is presented. To determine the magnitude of shunt currents, Kirchhoff's rule was applied to a linear electric circuit, and finite-difference differential equations for the sum of currents in all nodes of the electric model were recorded. Finite-difference differential equations are transformed into a matrix one, the solution of which allows to obtain leakage currents in all nodes of the electric model of the strain gauge. The total leakage currents in the lower and upper SE strain gauge for different cases, as well as the relative errors of deformation measurement due to shunting, are obtained.

Model test study on the rock mass deformation law of a soft rock tunnel under different ground stresses

It is difficult to monitor the deformation of a rock mass in front of a tunnel owing to the large buried depth and complex geological conditions. In this study, by using a self-designed model test box as a carrier and using loess, sand, gypsum, cement, and water as the raw materials, the class V materials similar to the surrounding rock are obtained through an orthogonal test. These are used to study the deformation law of a rock mass in front of a tunnel in different ground stress soft rock. The results show that similar materials for the surrounding rock can meet the needs of the testing concerning the physical and mechanical properties and have economic and environmental protection advantages. The three-dimensional loading of a similar geological body is used to simulate the state of the rock mass. The real-time monitoring of the rock mass stress and deformation is conducted during a simulation of tunnel excavation, and the deformation laws of the rock mass and surrounding rock in front of the tunnel are obtained. In the range of 0.26 times the tunnel diameter in front of the tunnel in the high ground stress soft rock, the deformation of the core rock mass is the largest part of the tunnel deformation. Therefore, to reasonably control the advanced deformation of the tunnel, it is necessary to pre-reinforce the core rock mass within 0.26 times the tunnel diameter in front of the tunnel. At 1 times the diameter in front of the face, a longitudinal load-bearing arch is formed in the rock mass, and this effectively controls the extrusion deformation of the core rock mass to expand forward.

Mechanical performance based rationalization research on steel-concrete double composite action

Casting an extra concrete bottom layer to a steel-concrete composite box girder in a hogging moment region can increase sectional stiffness and prevent steel buckling. However, a lower sectional neutral axis may not be favorable to concrete slab cracking and steel flange stress control. To this end, a double composite girder segment was proposed and investigated. Particularly, a static loading test on a large-scaled two-span continuous girder specimen with the double composite action in hogging moment region was conducted for mechanical investigation. Meanwhile, parametric analysis was carried out as well for a rational design scheme of the double composite section. The test results revealed that the load-carrying capacity of double composite section could be increased due to the contribution of extra bottom concrete layer. The transverse deformation of steel parts was favorably constraint. The parametric analysis results indicated that slab thickness that was 15% of steel girder height could provide most obvious contributions to the improvements of both sectional load-carrying capacity and cracking moment. Due to the additional reinforcement, the steel web thickness of double composite girder can be saved 16.7% and the steel bottom flange thickness only needs to meet the constructing requirement compared with common composite girder. Besides, the analysis also showed replacing the tub section with steel box section in the hogging moment region can reduce the stress on top flange by 24.4%. These results are an important basis for establishing a rational design scheme for the novel double composite section.

Methodology improvement of bulk compressive creep test: Deformation measurement and loading rate

Objectives(1) To identify improvements when bulk compressive creep testing of dental resin composite materials to reduce the sensitivity to the surface morphology and parallelism of specimens, to generate more accurate strain (displacement) measurement values. (2) To investigate the effect of loading rate on the creep and recovery behavior under bulk compressive creep test. MethodsCylindrical composite resin specimens were subjected to bulk compressive creep test with conventional and modified methodology (with/without introduction of stainless steel hemisphere and preload process). Furthermore, specimens undertook different loading rates ranging from 1 N/s to 50 N/s. Maximum deformation, creep deformation, permanent set as well as percentage of recovery during the creep and recovery procedure were compared, and surface topography changes before and after preload process was evaluated by laser scanning confocal. Burgers model was used to investigate the effect of improvements to each part of viscoelastic deformation of resin specimens. Results(1) The influence of surface evenness of resin specimens could be reduced by addition of preload process before the bulk compressive creep test resulting in significantly decreased permanent set (p = 0.002), and increased recovery to 91.7 % (p < 0.001). While the standard deviation of maximum deformation, permanent set and percentage of recovery had the smallest values when hemisphere was introduced to loading chain. (2) With increasing loading rate of bulk compressive creep tests, creep deformation increased and this trend became statistically significant when the loading rate reached 50 N/s. SignificanceThe accuracy of deformation measurement during bulk compressive creep test could be improved by means of introducing stainless steel hemisphere to the loading chain, and adding preload process to loading protocol.

Design of an Automobile Injection Mould Based on Automation Technology

At present, there are frequent occurrences in the industry of manufacturers only having products, but they have no product data, resulting in manufacturers unable to open molds to produce the products themselves and can only buy them at high prices. This article takes the rear case of an automobile generator produced by a company as an example, which aims to show the design of automobile injection molds through automation technology. This paper studies the use of automation technology to achieve the automatic model reconstruction of products, and uses the CAD technology to design injection molds based on the obtained digital models of products. This paper also uses the CAE technology to verify the feasibility and rationality of the designed mold, exploring the optimization method of the injection molding process of the mold. In this paper, a special product pouring system and demolding mechanism are designed according to the product process requirements. The design greatly simplifies the mold structure while fulfilling the product process requirements, which avoids the use of expensive hot runners and complex flip-chip mold structures, reducing the mold manufacturing cost. Secondly, the overall design of the injection mold is carried out, and the external dimensions and other main parameters of the mold are determined. Then, Moldflow software is used to simulate the injection molding process, verifying the feasibility and rationality of the designed mold. The optimization method of the injection molding process is also proposed, and the optimal injection process parameters are determined to ensure that the mold can produce qualified products and ensure high production efficiency. It can be seen from the analysis results that the maximum warpage deformation of the plastic part under all effects is 0.65 mm, which meets the product process requirements.

Finite element simulation of hardness testing with different material models

Finite element modelling is a modern and efficient way to perform stress-strain analyses on both simple components and complex structures. If the material properties are properly set, the software can also model the deformation of parts. A very important criterion of accurate finite element calculations is an appropriate material model. The stress–strain function recorded during the tensile testing of standard specimens shows that stress is not constant during deformation and so it can be specified with a function in finite element software. Often, in finite element modelling, a bilinear model is used to simplify this function. The aim of this paper is to show the difference between the bilinear model, the multilinear model (the model split into several sections the stress-strain curve) and the real function in the analysis of deformation in hardness testing. We also analyse the minimum density of meshing which still provides acceptable accuracy in hardness testing calculations.

METHOD OF VERIFICATION OF STANDARD ANTHROPOMETRICAL SURVEYS FOR CLOTHING

The performed research of normative documents made it possible to quantify the technical conditions of anthropometric body measurements and to determine how the nomenclature of anthropometric measurements depends on the classification of clothing. The aim of the study was to develop a methodology for verifying anthropometric measurements of the human body, taking into account the functional characteristics of clothing. A criteria approach to the synchronization of verification means of standards identification of measurement names by measurement method and measurement classification groups (horizontal, vertical, others) was used. Validation of standard measurements for the ergonomic design of garments and harmonization of control measurement code designations in finished garments have been performed. Standard control measurements were interpreted into additional dynamic compliance measurements to take into account the level of deformation of parts during operation and to ensure freedom of movement. Technical regulation of the anthropometric information volume is confirmed by the equivalence of the optimization problems of the considered anthropometric standards in the form of the linear programming problem of the set of anthropometric measurements. The matrix of conditions for fixing anthropometric measurements in six regulatory documents was studied. It was established that the set pair 25 &lt; 28 determines the technical conditions of quality control on the dummy of the finished product. Using basic and auxiliary reference measurements in the clothing size designation provides a flexible combination of chest, waist and hip measurements for women and chest and waist measurements for men. Consideration of the range of additional control vertical measurements is confirmed by calculating the indices of balance in the longitudinal direction of the female figure of size 164-96-104.

Simulation Analysis and Verification of Temperature and Stress of Wheel-Mounted Brake Disc of a High-Speed Train

During the braking process, a large amount of heat energy is generated at the friction surfaces between the brake disc and pads and rapidly dissipates into the disc volume. In this paper, a three-dimensional thermo-mechanical coupling model of high-speed wheel-mounted brake discs containing bolted joints and contact relationships is established. The direct coupling method is used to analyze the temperature and stress of the brake discs during an emergency braking event with an initial speed of 300 km/h. A full-scale bench test is also conducted to monitor the temperatures of the friction ring and bolted joints. The simulation result shows that the surface temperature of the friction ring reaches its peak value of 414 °C after 102 s of braking, which agrees well with the bench test result. The maximum alternating thermal stress occurs in the bolt hole where the maximum circumferential compressive stress is − 658 MPa and the maximum circumferential tensile stress is 134 MPa. During the braking process, the out-of-plane deformation of the middle part of the friction ring is larger than that of the edge, which increases the axial tensile load of the connecting bolt. This work provides support for the design of brake discs and connecting bolts.

Experimental Outcomes of Comparing Tilted Fiber Bragg Gratings Sensor to Existing Conventional Bragg Sensors

The study describes sensors with an inclined grid de-signed to monitor the condition of structures installed on the bridge. The aim of the study is to study the possi-bility of using the developed sensors with an inclined grid to monitor the condition of structures by checking the deformation of various parts of bridges under highway loads, as well as comparing the characteristics of sensors with an inclined grid with conventional Bragg sensors. In this paper, experimental observations show that the results of using sensors with an inclined grid are in excellent agreement with the results obtained using conventional Bragg sensors. Also, a change in the wavelength of the VBR was detected and a comparison of the deformation characteristics for measuring tem-perature without deformation and the VBR for measur-ing deformation characteristics on a sensitive Bragg sensor for 700 seconds.

Dynamic stability assessment of reservoir colluvial landslide using a hypoplastic clay constitutive model considering the effects of drying-wetting cycles on the hydro-fluctuation belt

The hydro-fluctuation belt of reservoir landslides undergoes repeated drying-wetting (D–W) cycles due to the annual fluctuation of water level in the Three Gorges Reservoir Area. Mechanical properties of the hydro-fluctuation belt subjected to D-W cycles should be considered for the evolution of landslide stability affected by seasonal rainfall and periodic reservoir water fluctuations. In addition, a reliable constitutive model essential for evaluating landslide stability should be employed to describe the mechanical property of soil. In this study, taking the Tangjiao landslide as an example, a series of drained triaxial and oedometer tests were conducted to study the effects of D-W cycles on the shearing and compression behaviors of the sliding mass soil. Then, the time-varying parameters of a hypoplastic clay constitutive model were calibrated based on the soil experiments under different D-W cycles. Eventually, the hydro-mechanical coupled simulation analyses were performed to study long-term deformations of the landslide front part influenced by actual rainfall and reservoir water fluctuations. Moreover, the evolution of landslide stability was analyzed using the vector-sum method based on stress fields with different time steps. The test results show that the D-W cycle significantly affects the mechanical property of soil. The hypoplastic model predicts well the shearing and compression behaviors of soil under different D-W cycles. The numerical results indicate that the soil weakening in the hydro-fluctuation belt increases the deformation magnitude of the toe slope and gradually decreases the landslide stability. This study provides some references for the dynamic stability assessment and long-term hydro-mechanical simulation of reservoir landslides.

A new approach for calculating inherent strain and distortion in additive manufacturing of metal parts

Additive manufacturing (AM) of metallic parts is widely utilized for industrial applications. However, quality issues of the printed parts, including part distortion and cracks caused by high temperature and fast cooling, result in high residual stress. This is a challenge that limits the industry acceptance of AM. To overcome this challenge, a numerical modeling method for predicting part distortion at the design stage plays an important role and enables design engineers to remove failures before printing as well as determine the optimal printing process parameters to minimize part deformation. This research proposes an inherent strain-based part deformation prediction method. To determine the inherent strain (IS) value, a micro-scale model for analyzing the temperature distribution is constructed. The IS value is calculated from the temperature gradient. Then, the IS value is used for determining the part deformation. The proposed methodology has been developed and evaluated using a 316L stainless steel cantilever beam in both simulations and experimental results.

An elastic‐inelastic model and embedded bounce‐back control for layered printing with cementitious materials

AbstractThis paper presents a finite‐deformation model for extrusion‐based layered printing with cementitious materials. The evolution of mechanical properties as the printed material cures and stiffens results in nonphysical reduction in the magnitude of elastic strains when standard constitutive models are employed. This elastic recovery of the printing induced deformation contradicts the experimentally observed behavior of the printed cementitious materials that harden at a nearly‐frozen deformed state. A thermodynamically motivated constraint on the evolution of elastic strains is imposed on the constitutive model to remedy the nonphysical bounce‐back effect. An algorithm that is based on a strain‐projection technique for the elastic part of deformation is developed that complements the inelastic response given by the Drucker–Prager model. It is then embedded in a finite strain finite element framework for the modeling and simulation of cure hardening and inelastic response of the early age cementitious materials. A ghost mesh method is proposed for continuous layer‐wise printing of the material without the need for intermittent mesh generation technique or adaptive remeshing methods. The model is validated via comparison with experimental data and representative test cases are presented that investigate the mathematical and computational attributes of the proposed model.

Factors determining the flow erosion/part deformation of film insert molded thermoplastic products

Abstract Flow erosion and part deformation are unsolved molding problems that restrict the overall success of film insert molding. This work investigated, both experimentally and numerically, the factors that affect flow erosion and part deformation in film inset molded products. Three plate-with-thickness-variation geometries, namely flat, thin-to-thick, and thick-to thin, were molded for the products. Polystyrene films and polyethylene terephthalate (PET) resins were employed in the experiments. It was found that the thin-to-thick specimens exhibited the most severe flow erosion. Increasing the injection pressure or melt temperature worsened flow erosion. Meanwhile, for the processing parameters adopted in the experiments, part deformation generally increased with melt temperature and hold time, while it decreased with injection pressure and hold pressure. Additionally, a numerical software (Moldex® 3-D) was employed to simulate the temperature and shear stress distributions in molded products. The calculated results suggested that part deformation in insert molded products results mainly from the non-uniform temperature profile during the cooling stage, owing to the product configuration and the insert film, while flow erosion is induced by the high shear stress of the polymer melt in the filling stage.

An Analytical Model for Cure-Induced Deformation of Composite Laminates.

Curing deformation prediction plays an important role in guiding the tools, curing process design, etc. Analytical methods can provide a rapid prediction and in-depth understanding of the curing deformation mechanism. In this paper, an analytical model is presented to study the cure-induced deformation of composite laminates. Based on the classical laminate theory, the thermal stress and deformation of composites during the curing process are calculated by considering the evolution of the mechanical properties of resin. Additionally, the coupling stiffness of the laminate is taken into consideration in the analytical model. An interface layer between the tool and the part is developed to simulate the variation of the tool–part interaction with the degree of resin cure. The maximum curing deformations and deformation profiles of different lay-up composite parts predicted by the proposed model are compared with the results of the finite element method and previous literature reports. Then, a comprehensive parametric study is carried out to investigate the influence of curing cycle, geometry, tool thermal expansion, and resin characteristics on the curing deformation of composite parts. The results reveal that geometry has a significant influence on the curing deformation of composite parts, but for dimensionally determined parts, curing deformation is mainly attributable to their own anisotropy in macro and micro aspects, as well as the stretching effect of the tool on the part. The percentage contribution of different factors to curing deformation composites with different lay-ups and geometries is also discussed.

Sequence stratigraphy and paleoenvironmental significance of the Neoproterozoic Bambui Group, Central Brazil

The Bambui Group is a ca. 2,000 m-thick mixed biochemical-siliciclastic sedimentary succession that accumulated in the Sao Francisco Basin, central Brazil. Its age is contentious, but deposition during the Cryogenian-Ediacaran (ca. 635–550 Ma) is consistent with a new sequence stratigraphic model presented herein and previously published geochemical and structural data. Six stratigraphic sequences are recognized that record depositional evolution from an epeiric sea to foreland basin during the Marinoan snowball glaciation (ca. 635 Ma) to shortly after the Gaskiers (ca. 580 Ma) glaciation. Although this stratigraphic architecture differs from the classic lithostratigraphic and more recent chemostratigraphic and sequence stratigraphic interpretations of the Bambui Group, it is supported by correlation to other Cryogenian-Ediacaran successions globally. Collectively, these six sequences preserve a robust record of seawater redox structure leading up to the oxygenation threshold that triggered the evolution of multicellular animals in the Ediacaran.Sequence 1 is composed of Marinoan glacial deposits and an overlying cap carbonate with aragonite fan pseudomorphs and barite. Sequence 2 is composed of lime-mudstone that changes laterally into loess-rich peritidal phosphorites, suggesting oxygen stratification in shallow paleoenvironments. Sequence 3 is a carbonate succession with abundant stromatolites implying widespread oxygen production. The top of Sequence 3 is marked by a regional subaerial unconformity developed during uplift associated with the onset of the Brasiliano-Pan African Orogeny. Sequence 4 signals a return to loess derived sedimentation. Distal deposits contain abundant organic matter with framboidal pyrite reflecting bacterial sulfate reduction in low sulfate Ediacaran seawater. Sequence 5 is composed of well-developed aggradational parasequences composed of alternating deep subtidal organic-rich siltstones and shallow-water carbonate grainstones. Their well-defined cyclicity is interpreted to record extreme sea level fluctuations during the onset of the Gaskiers glaciation. Stromatolites suggest an oxygen-stratified water column. Sequence 6 marks the change from an epeiric sea to a foreland basin. Interbedded basinal glauconitic siltstone and shale loess-rich are correlative with shoreface sandstones. Authigenic glauconite requires suboxic bottom waters to precipitate and thus reflects oxygenation of distal settings. Most of the deposition ended by ca. 560–550 Ma when the entire Bambui Group was deformed during the assembly of West Gondwana.In sequences 1, 2, 3, 4, 5, and the lower portion of 6, the lateral continuity of lithofacies, predictable layer-cake stratigraphy, and lack of fluvial coarse siliciclastic deposits are characteristics of epeiric sea successions. The appearance of immature sandstone, poorly sorted conglomerate, braided fluvial deposits, and synsedimentary deformation in the upper part of Sequence 6 are interpreted as the onset of foreland basin development. Stacking relationships of redox sensitive, authigenic lithofacies in both the epeiric sea and foreland phases support recent research suggesting seawater redox conditions were in a state of flux during the apex of the purported Neoproterozoic Oxygenation Event. Organic matter and authigenic pyrite in Sequences 4 and 5 reflect increased primary productivity in surface waters fertilized by nutrients such as P and Fe adsorbed on loess particles. This mechanism could be expanded to a global scale and have contributed to the increase in atmospheric and oceanic oxygen levels. These findings redefine and highlight the significance of the Bambui Group for Neoproterozoic Earth history.

Microrobotic Leg With Expanded Planar Workspace

A microrobotic leg actuated with amplifying mechanisms is developed in this letter to mimic the motion of legs in natural organisms on the small scale. The leg device has a planar structure and is fabricated with bulk micromachining. Two electrothermal actuators are used to drive the leg back and forth in the planar workspace. The actuator motion is transmitted elastically to the leg using flexible arms. The leg mechanism has a symmetrical structure similar to standard parallel planar manipulators but with deformable parts instead of joints. The motion of the leg at the tip side is further amplified by blocking its motion at the other side using stoppers, resulting in an extended range of motion at the leg tip. Finite element simulations and experimental tests on fabricated prototypes demonstrated the efficient operation of the proposed design. The unique characteristics of the proposed leg mechanism, including large force and displacement, multiple degrees of freedom, and compatibility with micromachining, enhance the power, control, and mobility autonomy of legged microbots.

자동차 혼 시스템 설계

Automobile horn system makes sound by vibration of an assembly in the system. The sound quality of the horn system is dominated by distance between two assemblies, which is named air gap. The two- vibration and body- assembly are made by processes of caulking and riveting respectively. In curling process, the two assemblies are put together to make a complete horn system before it undergo aging process in order to adapt to temperature changes. Horn system designer should consider the deformation of parts during the assembly processes which greatly affect the final air gap value. This paper investigate the deformation of parts of the horn system by experiment on assembly process. With the deformation data, a new horn system design is made to make more assembly product fit into the range of air gap. Monte carlo simulation is used to predict dimension of parts and deformation, which is proved to be good statistical method in the design of precise product such as horn system.

Updating the Coordinates of the Cadastral Sites After the Earthquake: Example of the 20.07.2017 Bodrum-Kos Earthquake

Bu araştırmada, 20.07.2017 (Mw:6.6) Bodrum-Kos depremi sonrası bölgede bulunan nirengi ve poligonlardaki koordinat değişimleri hesaplanmıştır. Beş sürekli GNSS istasyonu ile sekiz nirengi noktasında deprem sonrası GNSS oturumları yapılmıştır. Elde edilen koordinatlar ile deprem öncesi koordinatlar karşılaştırılarak jeodezik altyapıda meydana gelen deformasyon belirlenerek deformasyon haritaları oluşturulmuştur. Elde edilen deformasyon haritalarını kontrol etmek için 44 nirengi ve poligon noktasında 300 epok CORS-TR ağına bağlı olarak ölçü yapılmıştır. Bu ölçüler sonucunda hesaplanan deformasyonlarla Bodrum yarımadasının batı bölümünde, üretilen deformasyon haritaları ile uyum içinde olduğu görülmüştür. Yarımadanın doğusunda meydana gelen deformasyonun üretilen haritalarla uyum içinde olmadığı ve bu bölgelerde jeodezik altyapı yenileme çalışmalarının yapılabileceği değerlendirilmiştir.

Field-Scale Experiment on Deformation Characteristics and Bearing Capacity of Tunnel-Type Anchorage of Suspension Bridge

The suspension pipe bridge has become the main span type due to its large span, light structure, and other characteristics, playing an important role in the construction of the oil and gas backbone network and energy layout. Tunnel-type anchorage (TTA) is a special underground structure that provides anchorage tension for the suspension bridge. Since its form and bearing mechanism are complex, there is no general design method for tunnel-type anchorage so far, and the theoretical and normative research is not mature. In this paper, a field-scale experiment was carried out to study the north side tunnel of Wujiagang Bridge in Yichang, China. According to the similarity principle, the 1:12 tunnel anchor scale model was established. The tunnel anchor scale model is selected in the area adjacent to the actual project site to ensure the similarity of stratigraphic conditions. Through the use of a displacement meter, inclinometer hole, strain gauge, micrometers, and other comprehensive monitoring methods, the design load test, overload test, overload rheological test, and ultimate bearing capacity failure test were carried out. Through the structural deformation observation and stress observation of the anchorage body and surrounding rock, the stress deformation characteristics and rheological characteristics of the anchorage body and surrounding rock in the field-scale experiment were analyzed. The deformation failure mechanism, deformation failure process, potential failure mode, and overload capacity of solid tunnel anchor were studied. The control indexes such as deformation and stress values of key parts of the solid tunnel anchor at different stages are predicted. Based on the limit equilibrium analysis results of the model, the safety and rationality of the tunnel anchorage structure design of the actual suspension bridge were evaluated.

Interaction of printing speed and temperature settings on the build plate adhesion of 3D-printed polylactide acid parts

ABSTRACT Fused filament fabrication, also called material extrusion, is a widespread used 3D-printing process which allows to manufacture parts with a high freedom of design at low costs. A common issue is the deformation of parts during the printing process caused by thermal stress and an insufficient adhesion. Despite the widespread usage of material extrusion only few publications dealing with this topic and it is yet nearly unknown, which process parameters have an influence onto the part adhesion nor how they interact among each other. This publication investigates how the adhesion between part and build surface is affected by the most important process parameters. The influence of the first layer’s height, printing speed, nozzle temperature, and build surface temperature was determined for three different build surface materials. Furthermore, the interactions of these parameters among each other were investigated. It was found that the first layer’s height has a strong influence onto the adhesion, which can be increased up to 0.56 MPa. Also, a strong dependence of printing speed, build surface temperature and nozzle temperature among each other was found.