scholarly journals A MODEL OF THE WOVEN FABRIC ELONGATION AND BREAKING WITH INFLUENCE OF WARP AND WEFT THREADS UNEVENNESS AND INTERACTION

2021 ◽  
Vol 53 (3) ◽  
pp. 41-47
Author(s):  
Petr A. Sevostyanov ◽  
Vladimir I. Monakhov ◽  
Tatiana A. Samoilova ◽  
Ekaterina N. Vakhromeeva ◽  
Julia B. Zenzinova
Keyword(s):  
Finite Element Method ◽  
Strain Distribution ◽  
Breaking Strength ◽  
Woven Fabric ◽  
Stress And Strain ◽  
Computer Simulation Model ◽  
The Finite Element Method ◽  
Deformation Dynamics ◽  
Simulation Results ◽  
Detailed Picture

The article presents the results of development of the woven fabric rectangular sample stretching and tearing computer simulation model. The model allows to set the sample size, elastic modulus and tensile breaking strength of the threads, random variations of these indicators for the warp and weft threads along their length. The modelling algorithm provides for the breakage of the warp threads, the redistribution of stress and strain between the sections of the threads and allows to get a detailed picture of the fabric sample deformation dynamics before it breaks. Examples of modelling results, the influence of the interaction degree between two systems of threads on the features of the strain distribution over the sections of the warp threads are given. The similarity of the simulation results according to the developed algorithm and the finite element method is shown, and the advantages of the proposed algorithm are noted.

A Study on Application of the Honeycomb Structure in the Large-Scaled Parts

2010 ◽  
Vol 426-427 ◽  
pp. 525-528
Author(s):  
F.H. Yin ◽  
H. Guo
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
Strain Distribution ◽  
Large Scale ◽  
Honeycomb Structure ◽  
Theoretical Research ◽  
Stress And Strain ◽  
The Finite Element Method ◽  
Simulation Results ◽  
Stress And Strain Distribution

The Application of honeycomb structure was studied for the large-scaled structures in the paper. Stress and strain distribution of different nephogram structure is gained by the finite element method (FEM), the simulation results are discussed. Based on above-mentioned analysis, the evaluation of distortion is accomplished. The research provides a useful reference for the design of large-scale structure; it has had a certain project practical value and theoretical research value academically.

A Two Step Damage Prognosis Method for Beam-Like Truss Structures

2014 ◽  
Vol 578-579 ◽  
pp. 1092-1095
Author(s):  
Hao Kai Jia ◽  
Ling Yu
Keyword(s):  
Finite Element Method ◽  
Strain Energy ◽  
Truss Structure ◽  
Truss Structures ◽  
Second Step ◽  
The Finite Element Method ◽  
Modal Strain Energy ◽  
Damage Prognosis ◽  
Modal Curvature ◽  
Simulation Results

In this study, a two step damage prognosis method is proposed for beam-like truss structures via combining modal curvature change (MCC) with modal strain energy change ratio (MSECR). Changes in the modal curvature and the elemental strain energy are selected as the indicator of damage prognosis. Different damage elements with different damage degrees are simulated. In the first step, the finite element method is used to model a beam-like truss structure and the displacement modes are got. The damage region is estimated by the MCC of top and bottom chords of a beam-like truss structure. In the second step, the elemental MSECR in the damage region is calculated and the maximum MSECR element is deemed as the damage element. The simulation results show that this method can accurately locate the damage in the beam-like truss structure.

The Numerical Simulation of Effective Elastic Response for WC-Co Cemented Carbide

2015 ◽  
Vol 1096 ◽  
pp. 417-421
Author(s):  
Pei Luan Li ◽  
Zi Qian Huang
Keyword(s):  
Numerical Simulation ◽  
Finite Element Method ◽  
Finite Element ◽  
Theoretical Model ◽  
Material Properties ◽  
Cemented Carbide ◽  
Elastic Response ◽  
The Finite Element Method ◽  
Simulation Results ◽  
Element Method

By the use of finite element method, this paper predicts the effects of the shapes of reinforcements with different ductility (Co) on the effective elastic response for WC-Co cemented carbide. This paper conducts a comparative study on the material properties obtained through theoretical model, numerical simulation and experimental observations. Simulation results indicate that the finite element method is more sophisticated than the theoretical prediction.

scholarly journals Experiment and Simulation Investigation on the Tensile Behavior of Composite Laminate with Stitching Reinforcement

2011 ◽  
Vol 2011 ◽  
pp. 1-10
Author(s):  
Yi Wang ◽  
Nai Xian Hou ◽  
Zhu Feng Yue
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
Significant Influence ◽  
Composite Structures ◽  
Composite Laminate ◽  
Tensile Load ◽  
Tensile Behavior ◽  
The Finite Element Method ◽  
Tensile Process ◽  
Simulation Results

The experiments and finite element simulations of composite laminate with stitching are carried out. Firstly, the monotonous tensile experiments with and without stitching are conducted to investigate the influence of stitch reinforcement on the composite laminate. Secondly, the finite element method (FEM) is employed to simulate the tensile process of specimens, and the link element is introduced to simulate the stitching. The experiment results shows that the stitching has little influence on the damage load under monotonous tensile load, while there is a significant influence on the changing of strain. The FEM results are consistent with the experiment results, which means that the link element can be used to study the stitching of the composite laminate. The simulation results also show that the distributions of strain are changed obviously due to the existence of the stitching. Research results have a significant role on the design of the composite structures with and without stitching.

Analytic Calculation About the Strain Distribution of Any-Shaped Self-Organized Quantum Dot

2007 ◽  
Author(s):  
Yumin Liu ◽  
Zhongyuan Yu
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
Quantum Dot ◽  
Function Approximation ◽  
Strain Distribution ◽  
Function Technique ◽  
Plane Wave Expansion ◽  
The Finite Element Method ◽  
Self Organized ◽  
Element Method

The strain distribution of quantum dots is analytically calculated using the Green’s function technique; the general expressions for any shaped quantum dot are derived. As examples, this method is applied to cube, pyramid column, and taper-shaped quantum dot. Our expressions are correct comparing with the calculated results by finite element method and finite difference. This approach is very powerful and can be applied to any-shaped quantum dot, especially this method can directly used in the calculation of electronic structure of quantum dot by the envelop function approximation or plane wave expansion methods, because the analytic expression can exactly calculate the strain at any position. In the paper, we give the strain distribution of four types of shaped quantum dot, and some comparisons are given with the results calculated by the finite element method.

Effect of Interference on Stress and Strain Distribution on the Spherical Sealing Cup of a PIG in Dented Pipeline

2019 ◽  
Author(s):  
Hang Zhang ◽  
Jinhui Dong ◽  
Can Cui ◽  
Ningsheng Liao
Keyword(s):  
Strain Distribution ◽  
Optimization Design ◽  
Oil And Gas ◽  
Model Simulation ◽  
Outer Edge ◽  
Stress And Strain ◽  
Pipeline Transportation ◽  
Pipeline Inspection ◽  
Simulation Results ◽  
Stress And Strain Distribution

Abstract Regular pigging operation of the pipeline inspection gauges (PIGs) is crucial for pipeline transportation. However, the PIG is often stuck when it runs in the oil and gas pipeline due to the interaction between spherical sealing cup and dent inside the pipe. The stress and strain distribution of the outer edge of the spherical sealing cup can provide a reference to the problem of understanding the blockage. In this study, numerical simulation of a PIG with spherical sealing cups runs through a pipe with dented wall is presented using MSC Marc 2016. Effects of the interference (δ) of the spherical sealing cup on the stress and strain distribution on the outer edge of the cup were discussed based on the model. Simulation results indicate that the smaller the thickness of the spherical sealing cup, the greater the effect of the interference of the cup on the stress. And the thickness of the cup should not be too small, an example of the failure of pigging due to the small thickness of the cup and the increase in the interference is given. The conclusions obtained in this study can contribute to the optimization design of the PIGs.

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