Tensile Deformation and Progressive Failure Behavior of Woven-Fabric GFRP Laminates at Cryogenic Temperatures

Aerospace ◽  
2004 ◽  
Author(s):  
Satoru Takano ◽  
Tomo Takeda ◽  
Yasuhide Shindo ◽  
Fumio Narita
Keyword(s):  
Finite Element ◽  
Tensile Deformation ◽  
Progressive Failure ◽  
Woven Fabric ◽  
Failure Behavior ◽  
Cryogenic Temperatures ◽  
Scale Analysis ◽  
Damage Development ◽  
Fabric Composite ◽  
Macro Scale

This paper focuses on understanding the deformation and progressive failure behavior of glass/epoxy plain weave fabric-reinforced laminates subjected to uniaxial tension load at cryogenic temperatures. Cryogenic tensile tests were conducted on the woven-fabric laminates, and the damage development during loading was characterized by AE (acoustic emission) measurements. A finite element methodology for progressive failure analysis of woven-fabric composite panels was also developed, and applied to simulate “knee” behavior in the stress-strain responses and damage behavior in the tensile test specimens. The effect of strain concentrations due to the fabric architecture on the failure strain of the material was considered by incorporating the SVF (strain variation factor) from meso-scale analysis of a woven-fabric composite unit into the macro-scale analysis of the specimens. A comparison was made between the finite element predictions and the experimental data, and the agreement is good.

scholarly journals Homogenization of trabecular structures

2020 ◽  
Vol 310 ◽  
pp. 00041
Author(s):  
Tomáš Krejčí ◽  
Aleš Jíra ◽  
Luboš Řehounek ◽  
Michal Šejnoha ◽  
Jaroslav Kruis ◽  
...  
Keyword(s):  
Finite Element ◽  
Effective Properties ◽  
Macro Level ◽  
Truss Structures ◽  
Scale Analysis ◽  
Scale Problem ◽  
Meso Level ◽  
Multi Scale ◽  
Macro Scale ◽  
Multi Scale Analysis

Numerical modeling of implants and specimens made from trabecular structures can be difficult and time-consuming. Trabecular structures are characterized as spatial truss structures composed of beams. A detailed discretization using the finite element method usually leads to a large number of degrees of freedom. It is attributed to the effort of creating a very fine mesh to capture the geometry of beams of the structure as accurately as possible. This contribution presents a numerical homogenization as one of the possible methods of trabecular structures modeling. The proposed approach is based on a multi-scale analysis, where the whole specimen is assumed to be homogeneous at a macro-level with assigned effective properties derived from an independent homogenization problem at a meso-level. Therein, the trabecular structure is seen as a porous or two-component medium with the metal structure and voids filled with the air or bone tissue at the meso-level. This corresponds to a two-level finite element homogenization scheme. The specimen is discretized by a reasonable coarse mesh at the macro-level, called the macro-scale problem, while the actual microstructure represented by a periodic unit cell is discretized with sufficient accuracy, called the meso-scale problem. Such a procedure was already applied to modeling of composite materials or masonry structures. The application of this multi-scale analysis is illustrated by a numerical simulation of laboratory compression tests of trabecular specimens.

Lateral Collapse of Woven-Fabric Composite Tubes under Quasi-Static and Impact Loads

2011 ◽  
Vol 82 ◽  
pp. 296-301
Author(s):  
Sripad S. Tokekar ◽  
Maloy K. Singha ◽  
Narinder K. Gupta
Keyword(s):  
Progressive Failure ◽  
Woven Fabric ◽  
Collapse Mechanism ◽  
Impact Loads ◽  
Composite Tubes ◽  
Finite Element Software ◽  
Progressive Failure Analysis ◽  
Numerical Predictions ◽  
Fabric Composite ◽  
Good Agreement

An experimental investigation on the lateral collapse behaviour of woven fabric glass/epoxy composite tubes under quasi-static and impact loads are presented here. Composite tubes of different diameter to thickness ratios (D/t = 5.33 - 20.67) were compressed between two flat platens or by a short width square indenter. Impact tests were performed at the gravity drop hammer test setup. The fracture process and the energy absorption capability of the composite tubes under quasi-static and impact loads were studied. It was observed that, the lateral collapse mechanism of thick composite tubes (D/t < 10) was different from thinner tubes (D/t > 10). Finally, the progressive failure analysis of the composite tube was performed in finite element software ABAQUS. Good agreement was observed between the experimental results and numerical predictions.

scholarly journals Finite Element Analysis of Mezoscopic Damage Behaviors of Turkey Satin Woven Fabric Composite Materials

2006 ◽  
Vol 52 (2) ◽  
pp. 67-72
Author(s):  
Yasutomoa UETSUJI ◽  
Takehiro SHIMOYAMA ◽  
Toshio MATSUKA ◽  
Tetsusei KURASHIKI ◽  
Masaru ZAKO
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Composite Materials ◽  
Woven Fabric ◽  
Element Analysis ◽  
Fabric Composite

scholarly journals Investigation on tensile deformation and failure for 5052 aluminum alloy based on continuum damage model

2021 ◽  
Vol 2085 (1) ◽  
pp. 012039
Author(s):  
Pengjing Zhao ◽  
Jingpin Jiao ◽  
Gang Fang ◽  
Zhanghua Chen ◽  
Xiang Gao
Keyword(s):  
Finite Element ◽  
Aluminum Alloy ◽  
Damage Mechanics ◽  
Tensile Deformation ◽  
Damage Model ◽  
Inversion Method ◽  
Failure Behavior ◽  
Distribution Law ◽  
Deformation And Failure ◽  
Simulation Results

Abstract A VUMAT user material subroutine for the Lemaitre continuous damage mechanics model was developed based on the finite element solver ABAQUS/Explicit platform to investigate the deformation and failure behavior of 5052 aluminum alloy. The mechanical property parameters and damage parameters of 5052 aluminum alloy were identified by the inversion method combining tensile test and finite element simulation. The numerical simulation results showed that the force-displacement curves predicted by the established damage model were in good agreement with the experimental measurement, and the fracture location was close to the experimental results, which verified the accuracy and effectiveness of the damage parameters. The growth and distribution law of damage variable could be intuitively represented by the simulation results by the Lemaitre damage model.

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