A model for the prediction of debond onset in spherical-particle-reinforced composites under tension. Application of a coupled stress and energy criterion

2015 ◽  
Vol 106 ◽  
pp. 60-67 ◽  
Author(s):  
I.G. García ◽  
V. Mantič ◽  
E. Graciani
Keyword(s):  
Spherical Particle ◽  
Energy Criterion ◽  
Reinforced Composites ◽  
Particle Reinforced Composites ◽  
Coupled Stress

Effective Elastic Moduli of Spherical Particle Reinforced Composites Containing Imperfect Interfaces

2011 ◽  
Vol 21 (1) ◽  
pp. 97-127 ◽  
Author(s):  
K. Yanase ◽  
J. W. Ju
Keyword(s):  
Spherical Particle ◽  
Elastic Moduli ◽  
Elastic Stiffness ◽  
Inclusion Problem ◽  
Effective Elastic Moduli ◽  
Reinforced Composites ◽  
Approximate Methods ◽  
Imperfect Interfaces ◽  
Eshelby Inclusion ◽  
Particle Reinforced Composites

The effective elastic moduli of composite materials are investigated in the presence of imperfect interfaces between the inclusions and the matrix. The primary focus is on the spherical particle reinforced composites. By admitting the displacement jumps at the particle–matrix interface, the modified Eshelby inclusion problem is studied anew. To derive the modified Eshelby tensor, three approximate methods are presented and compared by emphasizing the existence of a unique solution and computational efficiency. Subsequently, the effective elastic stiffness tensor of the composite is formulated based on the proposed micromechanical framework and homogenization. Specifically, by incorporating imperfect interface, the modified versions of the Mori–Tanaka method, the self-consistent method, and the differential scheme are presented. By comparing these three methods, the effects of interfacial sliding and separation on the degradation (damage) of the effective elastic moduli of composites are analyzed and assessed. Finally, a critical aspect of the presented formulations is specifically addressed.

Manufacture and Microstructures of Fe-Cr-C Hypereutectic In Situ Composites

2007 ◽  
Vol 336-338 ◽  
pp. 1406-1408 ◽  
Author(s):  
Xiao Hui Zhi ◽  
Jian Dong Xing ◽  
Yi Min Gao ◽  
Xiao Jun Wu ◽  
Xiao Le Cheng
Keyword(s):  
Hypereutectic Alloy ◽  
Reinforced Composites ◽  
In Situ Composites ◽  
In Situ Composite ◽  
Particle Reinforced Composites ◽  
Primary Carbides

In the present study, a Fe-Cr-C hypereutectic alloy was prepared from industry-grade materials and subjected to modification and fluctuation, through which new types of particle reinforced composites, hypereutectic in-situ composite, was generated. The structures of the composite modified or not with the range of fluctuation addition from 0% to 2.8wt.%, were investigated. The primary carbides were refined with the addition of modifying agents and fluctuations. Increasing the amount of fluctuation resulted in finer primary carbides. At 1380oC, with the addition of modifying agents and 2.8wt.% fluctuation addition, the structure was well modified.

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