scholarly journals A homogenization-based damage model for stiffness loss in ductile metal-matrix composites

2020 ◽  
Vol 137 ◽  
pp. 103812
Author(s):  
Khaoula Dorhmi ◽  
Léo Morin ◽  
Katell Derrien ◽  
Zehoua Hadjem-Hamouche ◽  
Jean-Pierre Chevalier
Keyword(s):  
Metal Matrix Composites ◽  
Metal Matrix ◽  
Damage Model ◽  
Matrix Composites ◽  
Ductile Metal ◽  
Stiffness Loss

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.

Monte Carlo Simulation of Particle-Cracking Damage Evolution in Metal Matrix Composites

2005 ◽  
Vol 127 (3) ◽  
pp. 318-324 ◽  
Author(s):  
H. T. Liu ◽  
L. Z. Sun ◽  
H. C. Wu
Keyword(s):  
Monte Carlo Simulation ◽  
Monte Carlo ◽  
Metal Matrix Composites ◽  
Metal Matrix ◽  
Damage Evolution ◽  
Volume Fraction ◽  
Damage Model ◽  
Local Stress ◽  
Matrix Composites ◽  
Particle Cracking

In the modeling of microstructural damage mechanisms of composites, damage evolution plays an important role and has significant effects on the overall nonlinear behavior of composites. In this study, a microstructural Monte Carlo simulation method is proposed to predict the volume fraction evolution of damaged particles due to particle-cracking for metal matrix composites with randomly distributed spheroidal particles. The performance function is constructed using a stress-based damage criterion. A micromechanics-based elastoplastic and damage model is applied to compute the local stress field and to estimate the overall nonlinear response of the composites with particle-cracking damage mechanism. The factors that affect the damage evolution are investigated and the effects of particle shape and damage strength on damage evolution are discussed in detail. Simulation results are compared with experiments and good agreement is obtained.

Numerical Simulation of SHPB Experiment on Dynamic Behaviour of Ceramic Particle Reinforced MMCs

2006 ◽  
Vol 326-328 ◽  
pp. 1539-1542 ◽  
Author(s):  
Li Sheng Liu ◽  
Dong Feng Cao ◽  
Jiang Tao Zhang ◽  
Qing Jie Zhang
Keyword(s):  
Numerical Simulation ◽  
Numerical Experiment ◽  
Numerical Method ◽  
Metal Matrix Composites ◽  
Analytical Model ◽  
Metal Matrix ◽  
Dynamic Behaviour ◽  
Damage Model ◽  
Ceramic Particle ◽  
Matrix Composites

The dynamic behaviour of ceramic particle reinforced metal matrix composites (MMCs) is a key to its application. In this paper, the computational micro-mechanics method (CMM) is used to simulate SHPB experiment of MMCs. The numerical SHPB’s specimen of MMCs is firstly generated by CMM. Then, for verifying the correction of numerical experiment, the Al2O3/6061- T6Al composite is used to carry out numerical experiment, and the Johnson-Holmquist (JH-2) damage model is used to describe the ceramic mechanics behaviour, and a comparison between this numerical method and Unit Cell analytical model is carried out. Lastly, the dynamic behaviour of T6061Al/Al2O3 is investigated by this method.

Electron Microscopy of Metal-Matrix Composites

1970 ◽  
Vol 28 ◽  
pp. 404-405
Author(s):  
A. Lawley ◽  
M. R. Pinnel ◽  
A. Pattnaik
Keyword(s):  
Electron Microscopy ◽  
Metal Matrix Composites ◽  
Metal Matrix ◽  
Critical Evaluation ◽  
Elastic Behavior ◽  
Matrix Composites ◽  
Directionally Solidified ◽  
Fracture Characteristics ◽  
Broad Program

As part of a broad program on composite materials, the role of the interface on the micromechanics of deformation of metal-matrix composites is being studied. The approach is to correlate elastic behavior, micro and macroyielding, flow, and fracture behavior with associated structural detail (dislocation substructure, fracture characteristics) and stress-state. This provides an understanding of the mode of deformation from an atomistic viewpoint; a critical evaluation can then be made of existing models of composite behavior based on continuum mechanics. This paper covers the electron microscopy (transmission, fractography, scanning microscopy) of two distinct forms of composite material: conventional fiber-reinforced (aluminum-stainless steel) and directionally solidified eutectic alloys (aluminum-copper). In the former, the interface is in the form of a compound and/or solid solution whereas in directionally solidified alloys, the interface consists of a precise crystallographic boundary between the two constituents of the eutectic.

TEM examination of 2014-SiC metal matrix composite

1988 ◽  
Vol 46 ◽  
pp. 726-727
Author(s):  
M. G. Burke ◽  
M. N. Gungor ◽  
P. K. Liaw
Keyword(s):  
Metal Matrix Composite ◽  
Metal Matrix Composites ◽  
Matrix Composite ◽  
Metal Matrix ◽  
Tensile Deformation ◽  
Microstructural Characterization ◽  
Thin Foil ◽  
Matrix Alloy ◽  
Matrix Composites ◽  
Ion Milling

Aluminum-based metal matrix composites offer unique combinations of high specific strength and high stiffness. The improvement in strength and stiffness is related to the particulate reinforcement and the particular matrix alloy chosen. In this way, the metal matrix composite can be tailored for specific materials applications. The microstructural characterization of metal matrix composites is thus important in the development of these materials. In this study, the structure of a p/m 2014-SiC particulate metal matrix composite has been examined after extrusion and tensile deformation.Thin-foil specimens of the 2014-20 vol.% SiCp metal matrix composite were prepared by dimpling to approximately 35 μm prior to ion-milling using a Gatan Dual Ion Mill equipped with a cold stage. These samples were then examined in a Philips 400T TEM/STEM operated at 120 kV. Two material conditions were evaluated: after extrusion (80:1); and after tensile deformation at 250°C.

Sign in / Sign up

Export Citation Format

Share Document