Effective elastoplastic behavior of ductile matrix composites containing randomly located aligned circular fibers

2001 ◽  
Vol 38 (22-23) ◽  
pp. 4045-4069 ◽  
Author(s):  
J.W. Ju ◽  
X.D. Zhang
Keyword(s):  
Matrix Composites ◽  
Elastoplastic Behavior

A Computational Approach for the Constitutive Modeling of Elastoplastic Behavior of Metal Matrix Composites

2016 ◽  
Vol 14 (05) ◽  
pp. 1750058 ◽  
Author(s):  
M. U. Siddiqui ◽  
Abul Fazal M. Arif
Keyword(s):  
Composite Materials ◽  
Metal Matrix Composites ◽  
Metal Matrix ◽  
Three Dimensional ◽  
Constitutive Models ◽  
Computational Approach ◽  
Matrix Composites ◽  
Elastoplastic Behavior ◽  
Alumina Composite

Computational homogenization provides an excellent tool for the design of composite materials. In the current work, a computational approach is presented that is capable of estimating the elastic and rate-independent plastic constitutive behavior of metal matrix composites using finite element models of representative volume elements (RVEs) of the composite material. For this purpose, methodologies for the generation of three-dimensional computational microstructures, size determination of RVEs and the homogenization techniques are presented. Validation of the approach is carried out using aluminum–alumina composite samples prepared using sintering technique. Using the homogenized material response, effective constitutive models of the composite materials have been determined.

A Variational Asymptotic Model for Predicting Initial Yielding Surface and Elastoplastic Behavior of Metal Matrix Composite Materials

2007 ◽  
Author(s):  
Tian Tang ◽  
Wenbin Yu
Keyword(s):  
Metal Matrix ◽  
Energy Functional ◽  
Unit Cell ◽  
Asymptotic Model ◽  
Matrix Composites ◽  
The Finite Element Method ◽  
Elastoplastic Behavior ◽  
Variational Asymptotic ◽  
Variational Asymptotic Method ◽  
Variational Statement

The focus of this paper is to develop a micromechanics model based on the variational asymptotic method for unit cell homogenization (VAMUCH) for predicting of the initial yielding surface, overall instantaneous moduli, and elastoplastic behavior of metal matrix composites. Considering the size of the microstructure as a small parameter, we can formulate a variational statement of the unit cell through an asymptotic expansion of the energy functional. To handle realistic microstructures, we implement this new model using the finite element method. For model validation, we used a few examples to demonstrate the application and accuracy of this theory and the companion code.

Micromechanical Evolutionary Elastoplastic Damage Model for Fiber-Reinforced Metal Matrix Composites With Fiber Debonding

2004 ◽  
Author(s):  
J. W. Ju ◽  
H. N. Ruan ◽  
Y. F. Ko
Keyword(s):  
Metal Matrix Composites ◽  
Metal Matrix ◽  
Yield Criterion ◽  
Damage Model ◽  
Order Effects ◽  
Matrix Composites ◽  
Fiber Reinforced ◽  
Interfacial Damage ◽  
Elastoplastic Behavior ◽  
Three Phase

A micromechanical evolutionary damage model is proposed to predict the overall elastoplastic behavior and interfacial damage evolution of fiber-reinforced metal matrix composites. Progressive debonded fibers are replaced by equivalent voids. The effective elastic moduli of three-phase composites, composed of a ductile matrix, randomly located yet unidirectionally aligned circular fibers, and voids, are derived by using a rigorous micromechanical formulation. In order to characterize the overall elastoplastic behavior, an effective yield criterion is derived based on the ensemble-area averaging process and the first-order effects of eigenstrains.

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