scholarly journals An MMF3 Criterion Based Multi-Scale Strategy for the Failure Analysis of Plain-Woven Fabric Composites and Its Validation in the Open-Hole Compression Tests

Materials ◽  
2021 ◽  
Vol 14 (16) ◽  
pp. 4393
Author(s):  
Rui Zhou ◽  
Weicheng Gao ◽  
Wei Liu
Keyword(s):  
Woven Fabric ◽  
Scale Analysis ◽  
Micro Scale ◽  
Multi Scale ◽  
Woven Fabric Composites ◽  
Numerical Predictions ◽  
Fabric Composites ◽  
Open Hole ◽  
Meso Scale ◽  
Multi Scale Analysis

A modified micromechanics failure criterion (MMF3) based multi-scale analysis strategy was proposed in this article to analyze the failure behaviors of the plain-woven fabric composites. The finite-element (FE) representative unit cell (RUC) models of different scales were first established, and the RUC based stress transformation methods were developed. The micro-scale strengths of the constituents in the unidirectional laminate were achieved based on the tested macro-scale strengths. Under the micro-scale strength invariance hypothesis, the meso-scale strengths of the fiber tows from the plain-woven fabric composites were back-calculated first and were then validated and corrected with the assistance of tested strengths of the fabric laminates. With the micro-scale RUC and the calculated meso-scale strengths of the fiber tows, the micro-scale strengths of the constituents suitable for the plain-woven fabric composites were determined. The multi-scale analysis procedure for the plain-woven fabric composites was then established in providing a more direct failure observation at the constituent level. Open-hole compression specimens were tested according to the ASTM standard D6484, and the failure of the open-hole fabric laminate was simulated with the proposed multi-scale strategy. The numerical predictions were in good agreement with the experimental results, and the feasibility of the multi-scale strategy was validated.

A Multi-Scale Analysis for an Evaluation of the Mechanical Properties of Composite Materials

2007 ◽  
Vol 334-335 ◽  
pp. 585-588
Author(s):  
Makoto Imura ◽  
Tetsusei Kurashiki ◽  
Hiroaki Nakai ◽  
Masaru Zako
Keyword(s):  
Mechanical Properties ◽  
Finite Element ◽  
Composite Materials ◽  
Material Properties ◽  
Woven Fabric ◽  
Scale Analysis ◽  
Multi Scale ◽  
Woven Fabric Composites ◽  
Fabric Composites ◽  
Multi Scale Analysis

Fiber reinforced composite materials have been applied widely to many structures, because they have some advantages like easy handling, high specific strength, etc. The numerical method like finite element method has been applied to design and to evaluate the material properties and behavior as the development of Computer Aided Engineering. It is very difficult to calculate with accuracy not only in structural scale but also in detail material scale (for example, the order of fiber diameter) by the traditional FEM, becausecompositematerials like woven fabric composites have the geometrical complexityand the large difference between above mentioned scales. The development of multi-scale analysis method is one of the major topics in computational mechanics. Mesh superpositionis one of multi-scale analysis methods and is an effective method to solve the problems which have the large difference between the structure scale and the reinforcement scale. We have expanded the finite element mesh superposition method with 3 scales and have defined as M3 (Macro-Meso-Micro) method. In this paper, we have proposed a new approach method combined with M3 method and homogenized method to obtain the mechanical properties and to simulate the behavior of woven fabric composites. In addition, the elastic-plastic mechanics and the damage mechanics have been introduced into M3 method to investigate the effects of matrix-crack on the structural and material properties. From the numerical results, it is revealed that it is very useful for the evaluation of mechanical properties of composite materials.

Progressive failure prediction of woven fabric composites using a multi-scale approach

2016 ◽  
Vol 27 (1) ◽  
pp. 97-119 ◽  
Author(s):  
Lei Xu ◽  
YuanChen Huang ◽  
Chao Zhao ◽  
Sung Kyu Ha
Keyword(s):  
Progressive Failure ◽  
Woven Fabrics ◽  
Unit Cell ◽  
Woven Fabric ◽  
Micro Scale ◽  
Multi Scale ◽  
Woven Fabric Composites ◽  
Representative Unit Cell ◽  
Fabric Composites ◽  
Meso Scale

Finite element representative unit cell models are established for the study of progressive failure of woven fabrics: plain weave, twill weave, and satin weave. A multi-scale approach ranging from the meso-scale to micro-scale regime is used, providing the failure observation inside the constituents. The constituent stresses of the fiber and matrix in the warp and fill tows of the woven fabric unit cell are calculated using micromechanics. Correlations between meso-scale tow stresses and micro-scale constituent stresses are established by using stress amplification factors. After calculating micro-scale stresses, the micromechanics of failure damage model is employed to determine the progressive damage statuses in each constituent of woven fabric composites. For the matrix of tows, a volume-averaging homogenization method is utilized to eliminate damage localization by smearing local damages over the whole matrix region of the unit cell. Subsequently, the ultimate strength is predicted for woven composites with different tow architectures. The prediction results are compared with the experimental values, and good agreement is observed.

Multi-Scale Analysis of Viscoelastic Behavior of Laminated Composite Structures

2010 ◽  
Vol 430 ◽  
pp. 115-132
Author(s):  
Y. Shibuya ◽  
Hideki Sekine
Keyword(s):  
Viscoelastic Properties ◽  
Composite Structures ◽  
Viscoelastic Behavior ◽  
Laminated Composite ◽  
Scale Analysis ◽  
Scale Level ◽  
Micro Scale ◽  
Multi Scale ◽  
Laminated Composite Structures ◽  
Multi Scale Analysis

For high temperature applications of laminated composite structures, viscoelastic behavior of laminated composite structures is investigated by multi-scale analysis based on a homogenization theory. Effective viscoelastic properties of the laminas are evaluated by a boundary integral method at a micro-scale level, and viscoelastic analysis for laminated composite structures is performed by a finite element method at a macro-scale level using the effective viscoelastic properties of lamina obtained by the micro-scale analysis. In the multi-scale analysis, the Laplace transformation is adopted and the correspondence principle between elastic and viscoelastic solutions in the Laplace domain is applied. The inverse Laplace transform is formulated by the Duhamel integral, and is calculated numerically. As a numerical example, a laminated composite plate with a hole is treated and the viscoelastic behavior of the laminated composite structure is elucidated.

Multi-scale modeling of refractory woven fabric composites

2006 ◽  
Vol 41 (20) ◽  
pp. 6647-6654 ◽  
Author(s):  
Y. W. Kwon ◽  
D. H. Kim ◽  
T. Chu
Keyword(s):  
Woven Fabric ◽  
Multi Scale ◽  
Scale Modeling ◽  
Woven Fabric Composites ◽  
Fabric Composites ◽  
Multi Scale Modeling

scholarly journals Multi-scale analysis of neural activity in humans: Implications for micro-scale electrocorticography

2016 ◽  
Vol 127 (1) ◽  
pp. 591-601 ◽  
Author(s):  
Spencer Kellis ◽  
Larry Sorensen ◽  
Felix Darvas ◽  
Conor Sayres ◽  
Kevin O’Neill ◽  
...  
Keyword(s):  
Neural Activity ◽  
Scale Analysis ◽  
Micro Scale ◽  
Multi Scale ◽  
Multi Scale Analysis
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