ANSYS Environment Research Articles

Plasma-jet hard-facing modeling

The problem of automating the process of parts restoration by means of plasma welding in the environment of ANSYS.

Static and dynamic characteristic analysis of high-speed press bed based on virtual simulation

This paper establishes a three-dimensional solid model of J76-125 Straight Side High-speed Double-crack Precision Press using CATIA, and then the model is imported into an ANSYS environment to form the static and dynamic finite element simulation model. Based on the finite element analysis method, the static stress, deformation, vibration mode and transient response of the press bed are developed under preload conditions, as well as under the combination of the preload and nominal pressure conditions. Besides, the static loading experiment, the mode experiment and the pile-driving experiment are conducted to revise the simulation model. Finally, the simulation model and analysis procedure are verified through the comparison of the experiment results and the simulation ones.

The Vibration Features Analysis on Special Computer

A certain type of special computer was studied as the institute in this paper. Through researching on the structure of the special computer box, use the Pro/E software to create the simplified model of the case, including computer cabinet, PCB, power and fan etc. Model analysis is conducted in the FEA environment ANSYS, attains ten order natural frequency and vibration mode. Dynamic load in the model is applied with half sine impact acceleration, and the resistance performance of the PCB which is the important components of the model is researched by the acceleration, speed and displacement response results obtained. Verify the installation method of vibration isolator can effectively improve the shock resistance of special computer.

Finite Element Prediction for the Internal Stresses of (Ti,Al)N Coatings

The general topic of this paper is the computer simulation with use of finite element method (FEM) for determining the internal stresses of selected gradient and single-layer PVD coatings deposited on the sintered tool materials, including cemented carbides, cermets and Al2O3+TiC type oxide tool ceramics by cathodic arc evaporation CAE-PVD method. Developing an appropriate model allows the prediction of properties of PVD coatings, which are also the criterion of their selection for specific items, based on the parameters of technological processes. In addition, developed model can to a large extent eliminate the need for expensive and time-consuming experimental studies for the computer simulation. Developed models of internal stresses were performed with use of finite element method in ANSYS environment. The experimental values of stresses were calculated using the X-ray sin2ψ technique. The computer simulation results were compared with the experimental results. Microhardness and adhesion as well as wear range were measured to investigate the influence of stress distribution on the mechanical and functional properties of coatings. It was stated that occurrence of compressive stresses on the surface of gradient coating has advantageous influence on their mechanical properties, especially on microhardness. Absolute value reduction of internal stresses in the connection zone in case of the gradient coatings takes profitably effects on improvement the adhesion of coatings. It can be one of the most important reasons of increase the wear resistance of gradient coatings in comparison to single-layer coatings.

Analysis of the maximum friction condition for green body forming in an ANSYS environment

Axisymmetric extrusion of an elasto-plastic material with the maximal shear stress condition between the material and the forming tool is considered. The elastic component of deformation is assumed negligible in comparison with its plastic part. Challenges related to the numerical modeling of such a problem with the commercial software ANSYS are identified. In conclusions, recommendations for treating the problem are proposed.

Effect of delamination on vibration behaviour of woven Glass/Epoxy composite plate-An experimental study

We have analysed the free vibration responses of the laminated composite plate with delamination numerically and validated with subsequent experiment. In order to compute the numerical frequencies, the delaminated composite plate is modelled with two sub-laminate approaches in the commercial finite element package (ANSYS) using ANSYS parametric design language code in ANSYS environment. For the experimental analysis, the woven Glass/Epoxy composite plate is fabricated using hand layup method with the desired delamination. The natural frequencies of the delaminated plate are also computed experimentally with the help of the vibration analyser (NI-CDAQ) and validated by comparing with the simulation result. Further, the simulation model is extended for various design parameter and discussed in detail.

Prediction of the properties of PVD/CVD coatings with the use of FEM analysis

The aim of this paper is to present the results of the prediction of the properties of PVD/CVD coatings with the use of finite element method (FEM) analysis. The possibility of employing the FEM in the evaluation of stress distribution in multilayer Ti/Ti(C,N)/CrN, Ti/Ti(C,N)/(Ti,Al)N, Ti/(Ti,Si)N/(Ti,Si)N, and Ti/DLC/DLC coatings by taking into account their deposition conditions on magnesium alloys has been discussed in the paper. The difference in internal stresses in the zone between the coating and the substrate is caused by, first of all, the difference between the mechanical and thermal properties of the substrate and the coating, and also by the structural changes that occur in these materials during the fabrication process, especially during the cooling process following PVD and CVD treatment.The experimental values of stresses were determined based on X-ray diffraction patterns that correspond to the modelled values, which in turn can be used to confirm the correctness of the accepted mathematical model for testing the problem.An FEM model was established for the purpose of building a computer simulation of the internal stresses in the coatings. The accuracy of the FEM model was verified by comparing the results of the computer simulation of the stresses with experimental results. A computer simulation of the stresses was carried out in the ANSYS environment using the FEM method.Structure observations, chemical composition measurements, and mechanical property characterisations of the investigated materials has been carried out to give a background for the discussion of the results that were recorded during the modelling process.

The Analysis of ANSYS Package Applicability for Calculating the Elements of the Heat Losses Recuperation System in the Power Unit of the Mobile Compressor Unit

The article analyses the issues of the calculation technique applicability for the fuel heating process in the channels of the elements comprising the heat losses recuperation system for the internal combustion engines (ICE). The technique on the basis of ANSYS package is presented. The technique was used to calculate fuel heating in the channels with complex configuration that can be implemented in a heat losses recuperation system in ICE. The comparison of the integral computation results obtained in the ANSYS environment with the calculation results received by the standard engineering techniques has shown their satisfactory convergence. Also the results of calculating the length of a kerosene heating channel with round and triangular cross section are compared and analyzed. It is shown that the heating area in the channel with round cross section, with the heating leading to the kerosene boiling, is longer than in the channel with triangular cross section.

FLEXIBLE DYNAMIC MODEL OF ATTITUDE MANEUVERING OF RAZAKSAT® SATELLITE

In this paper, a dynamic model equation of the RazakSAT® class satellite three flexible solar panels for three-dimensional dynamic studies is developed based on the coupling deformation field. In the model, each solar panel is flexible and attached to the satellite body via a fixed joint where the assumption of Euler-Bernoulli beam is applied for the solar panels. Lagrange and assumed mode method are used to develop the dynamic model of the RazakSAT® multi-body system. A comprehensive model of flexible satellite has been provided in ANSYS environment as a reference when simulating the theoretical response generated by MATLAB to show that the coupling effect on the characteristics of the flexible sub system while undergoing rigid-body rotational motion.

Forming a Structured Surface of a New Type of Solar Absorber with Hydroforming

One of the ways to increase efficiency of the solar absorber is modification of absorption area in the system of pyramidal cavities, where the incident radiation is absorbed by multiple reflections. The paper deals with the technology of production of the flow solar absorber with a structured surface in a single technological operation using hydroforming. Two laser-welded sheets are inserted into the forming chamber. Then the space between them is pressurized with hydraulic fluid which causes their form to the desired shape. The first part of this article describes hydroforming device. The second section deals with theoretical simulation of forming a different structured surface in the programming environment of ANSYS. As follows practical test of hydroforming is performed. Austenitic stainless steel X5CrNi18-10 was used as a material for the production of samples.

Method of Determining the Strain Hardening of Carburized Elements in Ansys Environment

The paper presents a method based on FEM analysis of determining the strain hardening of elements after the thermochemical treatment. A computational algorithm, which takes into account two factors, has been suggested. Firstly, the gradient of material properties resulting from the changes in the carbon content in the surface layer after the carburizing process. Secondly, the phase transformations occurring during the hardening of the material. The proposed flowchart did not include the flow effect, which greatly reduced the computation time by eliminating tedious CFD calculations. Thanks to an original program Converter coupled with a commercial software's SimHard, SimCarb J Math Pro and Ansys the carburizing process followed by quenching in gases was modeled. In parallel to the numerical calculations the results were verified experimentally. The results of FEM analysis for the tube made of stainless EN 16CrMn5 subjected to three processes of thermochemical treatment have also been presented in the paper. The experimental results were compared with the numerical simulations and a satisfactory convergence has been achieved.

Experimental and numerical analysis of aluminum-aluminum bolted joints subject to an indentation process

The increasing interest of the industry (especially automotive, aviation and marine) in the fastener joints (riveted, bolted, etc.) between metallic materials, has re-opened the study on the possibility to improve the performance of the drilled structure using plastic deformation processes.Indentation process, performed before the drilling operation, creates circumferential compression stresses around the hole which increase significantly the mechanical performance of the drilled structures.In this paper, static and the fatigue performances of aluminum–aluminum (AW 6082-T6) single-lap bolted joints are studied. In particular, the study compares the mechanical strength of only drilled single-lap bolted joints (OD specimens) and single-lap bolted joints subject to an indentation process (IP specimens). In order to determine the cycles to failure and the corresponding Wöhler diagram, several fatigue tests are performed. The analyses allow to determine the mechanical performance and the failure mode of the analyzed joints.Several numerical analysis, conducted in ANSYS environment on three-dimensional models of the single-lap joint, are focused on the evaluation of the residual stress on the indented plate and, in particular, to compare the stress distribution on both type of analyzed joints.

Large deformation bending analysis of functionally graded spherical shell using FEM

In this article, nonlinear finite element solutions of bending responses of functionally graded spherical panels are presented. The material properties of functionally graded material are graded in thickness direction according to a power-law distribution of volume fractions. A general nonlinear mathematical shallow shell model has been developed based on higher order shear deformation theory by taking the geometric nonlinearity in Green-Lagrange sense. The model is discretised using finite element steps and the governing equations are obtained through variational principle. The nonlinear responses are evaluated through a direct iterative method. The model is validated by comparing the responses with the available published literatures. The efficacy of present model has also been established by demonstrating a simulation based nonlinear model developed in ANSYS environment. The effects of power-law indices, support conditions and different geometrical parameters on bending behaviour of functionally graded shells are obtained and discussed in detail.

Stability and Free Vibration Behaviour of Laminated Composite Panels Under Thermo-mechanical Loading

In this article, the free vibration and the buckling (mechanical and/or thermal) behaviour of laminated composite flat and curved panels are analysed numerically. Simulation model has been developed using ANSYS Parametric design language code in the ANSYS environment. The convergence behaviour of present finite element results have been checked and comprehensiveness of the model is revealed by comparing the results with those available published literature. Wide variety of numerical examples is solved for different parameters such as lamination schemes, support conditions and material properties under the thermo-mechanical load to highlight the applicability of the present simulation model. It is finally understood that the proposed model is capable of solving the mechanical responses (free vibration and buckling) of orthotropic materials accurately with very less computational cost under the combined action of loading.

Optymalizacja wybranych parametrów geometrycznych belki suportowej frezarki HSM 180 CNC w środowisku ANSYS

Optymalizacja wybranych parametrów geometrycznych belki suportowej frezarki HSM 180 CNC w środowisku ANSYS

Design of the gas turbine engine rotor wheel with ceramic blades

The use of ceramic parts in the hot section of a gas turbine engine will make it possible to increase theengine efficiency due to the increased operating gas temperature at the combustion chamber outlet and reducedair consumption for blade cooling, as well as significantly reduce the weight of the parts due to the low densityof ceramics. The main disadvantage of ceramic parts is the brittleness of the material. Mechanical properties ofadvanced ceramic materials are insufficient for making a whole wheel, however, they are sufficient for makingblades. The main problem in making a structure of this kind is ensuring the strength of the interlock between ametal disk and ceramic blades. Previous works of the authors presented analysis of various types of interlocksbetween ceramic blades and a metal disk. This paper is devoted to the design of an aero engine gas turbine rotorwheel using a high-strength silicon nitride ceramic material. A software code in the APDL Ansys environment iscreated that makes three-dimensional design definition possible. A rotor wheel with ceramic blades is designedon the basis of a typical aircraft high-pressure gas turbine engine. A commercial heat-resistant nickel alloy isconsidered as the disk material, while silicon nitride is used for the production of blades. Evaluation of thestress-strain state and strength analysis are conducted, the properties of the ceramic material are analyzed. Theresults of the research show that it is necessary to make a special cooling system for a metal disk and that theproperties of the ceramics presented are to be improved. It is reasonable to apply similar constructions on stationarygas turbine plants.

Elastic buckling of a sandwich beam with variable mechanical properties of the core

This paper deals with the analytical and numerical studies of elastic buckling of a three-layered beam with metal foam core. Mechanical properties of the core are variable along the z-axis. There are two schemes of displacement of the faces and core of the beam: a broken line hypothesis and a non-linear hypothesis. The mathematical models for both types of displacements are presented. The governing differential equations of the sandwich beam are derived. Numerical analysis of sandwich beams is conducted in ANSYS environment. The finite elements analysis has been performed using a linear elastic buckling model. The analysis with constant and variable Young׳s modulus of the core of the beam is carried out. The values of the critical load obtained by the analytical and numerical (FEM) methods are compared.

Calculation Method of Pure Resistance and Inductance of Ore-Thermal Furnaces Electrode Holder Tubes

While designing an ore-thermal furnace it is necessary to minimize and balance its secondary current contact jaw electrical parameters. The study deals with the method of calculating pure resistance and inductance of ore-thermal furnace electrode holder tubes. It is significant because the tubes have complicated wires configuration and their resistance is noticeable in current contact jaw total impedance because of the same half-phase currents flow in tube bundles and absence of magnetic flux compensation. Real bent wires are suggested to be approximated by broken lines. After that both existing and proposed by the authors formulas can be used for calculating inductance and mutual inductance of two straight-line wires arbitrary placed in space. Current distribution non-uniformity along separate tubes is taken into account in an iterative algorithm. Currents in wires are assumed to be equal at the first iteration. Then they are corrected at following steps of the iteration algorithm with respect to wires resistances calculation results. Skin effect and closure effect between wires segments are taken into account when pure resistance is calculated. The proposed method has been applied in the development of the software for calculating ore-thermal furnace secondary current-contact jaw electrical parameters. The method has been approbated in the design of the 60 MVA ore-thermal furnace made by ZAO “Electroterm”, Novosibirsk, Russia. The results obtained have been tested with numeric 3D models created in ANSYS environment. Inductance calculation error is 10%, pure resistance error is 25%.

Three-Dimensional Finite Element Analysis of Lower Molar Tooth Restored with Fully Milled and Layered Zirconia Crowns

Comparing the principle stresses distributions for both fully milled zirconia (FMZ) crown made of yattria-stabilized zirconia (Y-TZP) and layered crowns made Y-TZP core and feldspathic porcelain veneer using finite element analysis, was shot in this study. A three dimensional finite element model was constructed under ANSYS environment. The natural prepared tooth or titanium (Ti) abutment/implant complex were modeled in 3D on commercial general purpose CAD/CAM software. Crown geometry was acquired by using 3D contact scanner, which goes through successive graphical modification before assembled in a 3D finite element model. Crown made from single material (FMZ) is stiffer than layered one. The crown outer layer (Porcelain) receives more energy and stresses (of order 3.8%) than if it was made from Zirconia. While the crown core (inner part) will receive less stresses (about 38%) and energy if it was coated by Porcelain.

Optimal Structure Design of Mobile Phone Packing Box Based on Dynamic Analysis

By using the finite element analysis method, this paper firstly conducted simulation test for phone packing boxes under ANSYS environment. As a result, the force distributiones of packing boxes under different loading conditions were calculated, the reliability of cushion packing box is obtained. Finally, structural optimization is conductedwas carried out to the location where may undertake bigger force. Then, experiments and tests were conducted to the optimized packing box. In the meantime, the theoretical simulation result and the measured result from test are compared. Repeated comparisons have been carried out to draw the final decision.