Journal ArticleDOI
Critical stress criteria for interfacial cavitation in MMCs
A.F. Whitehouse,T.W. Clyne +1 more
Reads0
Chats0
TLDR
In this article, the formation, growth and coalescence of cavities during tensile loading of metal matrix composites (MMCs) was investigated. And it was concluded that cavities form when a critical hydrostatic stress is reached.Abstract:
Density measurements and microstructural examinations have been used to follow the formation, growth and coalescence of cavities during tensile loading of metal matrix composites (MMCs). Finite element modelling has been used to predict the stress states around reinforcements of various shapes. The positions of peak hydrostatic and normal stress components at the interface have been compared with the microstructural sites where voids were found to form experimentally in aluminium reinforced with alumina particles or fibres. It is concluded that cavities form when a critical hydrostatic stress is reached.read more
Citations
More filters
Journal ArticleDOI
Scale dependent crystal plasticity framework with dislocation density and grain boundary effects
TL;DR: In this paper, the geometrically nonlinear scale dependent response of polycrystal FCC metals is modelled by an enhanced crystal plasticity framework based on the evolution of several dislocation density types and their distinct physical influence on the mechanical behaviour.
Journal ArticleDOI
Crystal plasticity model with enhanced hardening by geometrically necessary dislocation accumulation
TL;DR: In this paper, a strain gradient dependent crystal plasticity approach is used to model the constitutive behavior of polycrystal FCC metals under large plastic deformation, where material points are considered as aggregates of grains, subdivided into several fictitious grain fractions: a single crystal volume element stands for the grain interior whereas grain boundaries are represented by bi-crystal volume elements.
Journal ArticleDOI
Damage initiation in model metallic materials: X-ray tomography and modelling
TL;DR: In this paper, the effects of matrix elastoplastic properties and reinforcement volume fraction on damage initiation in model heterogeneous metals have been studied using in situ tensile tests coupled with high resolution X-ray tomography.
Journal ArticleDOI
Structural performance of discontinuous metal matrix composites
I. Sinclair,P. J. Gregson +1 more
TL;DR: In this article, a review of structural properties of discontininuous metal matrix composites is presented, with an emphasis on the need for an improved understanding of damage tolerance characteristics in these materials and the associated potential for development offracture resistant discontinuous metal composite materials highlighted.
Journal ArticleDOI
A micromechanical damage model for effective elastoplastic behavior of partially debonded ductile matrix composites
J.W. Ju,Haeng-Ki Lee +1 more
TL;DR: In this paper, a micromechanical damage model considering progressive partial debonding is presented to investigate the effective elastoplastic-damage behavior of partially debonded particle reinforced ductile matrix composites (PRDMCs).
References
More filters
Book
An introduction to metal matrix composites
T.W. Clyne,Philip J. Withers +1 more
TL;DR: In this article, the Eshelby approach is used to model composites and a program for calculating the S-tensors of a composite model is presented, along with a list of programs for an Eshelbys calculation.
Journal ArticleDOI
Crack deflection at an interface between dissimilar elastic-materials
M.Y. He,John W. Hutchinson +1 more
TL;DR: In this paper, the authors examined the competition between deflection and penetration when the materials on either side of the interface are elastic and isotropic and determined the range of interface toughness relative to bulk material toughness which ensures that cracks will be deflected into the interface.
Journal ArticleDOI
An experimental and numerical study of deformation in metal-ceramic composites
TL;DR: In this article, the deformation characteristics of ceramic whisker- and particulate-reinforced metal-matrix composites were studied experimentally and numerically with the objective of investigating the dependence of tensile properties on the matrix microstructure and on the size, shape, and distribution of the reinforcement phase.
Journal ArticleDOI
Failure Mechanisms in Ceramic‐Fiber/Ceramic‐Matrix Composites
TL;DR: In this paper, the authors used in situ observations during tensile and flexural loading to investigate the mechanisms of failure in a unidirectional Sic-fibe/glass-ceramic composite and showed that failure in tension occurs in several stages (similar to certain other brittle fiber composites): multiple matrix cracking, followed by fiber fracture and pullout.
Journal ArticleDOI
Measurement of Interfacial Mechanical Properties in Fiber‐Reinforced Ceramic Composites
TL;DR: In this paper, a methode d'indentation dans laquelle un indenteur pyramidal est utilise for pousser les fibres and provoquer un glissement a l'interface fibre/matrice.
Related Papers (5)
Cavity formation during tensile straining of particulate and short fibre metal matrix composites
A.F. Whitehouse,T.W. Clyne +1 more