Effect of residual stresses on the interfacial fracture behavior of metal-matrix composites

Abstract In metal matrix composites residual stresses developing during the cool-down process after consolidation due to mismatch in thermal expansion coefficients between the ceramic fibers and metal matrix have been predicted using finite element analysis. Conventionally, unit cell models consisting of a quarter fiber surrounded by the matrix material have been developed for analyzing this problem. Such models have successfully predicted the stresses at the fiber-matrix interface. However, experimental work to measure residual stresses have always been on surfaces far away from the interface region. In this paper, models based on the conventional unit cell (one quarter fiber), one fiber, two fibers have been analyzed. In addition, using the element birth/death options available in the FEM code, the surface layer removal process that is conventionally used in the residual stress measuring technique has been simulated in the model. Such layer removal technique allows us to determine the average surface residual stress after each layer is removed and a direct comparison with experimental results are therefore possible. The predictions are compared with experimental results of an eight-ply unidirectional composite with Ti-24Al-11 Nb as matrix material reinforced with SCS-6 fibers.

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Residual Stresses In and Around a Short Fiber in Metal Matrix Composites Due To Temperature Change

Recent Advances in Composites in the United States and Japan ◽

10.1520/stp32790s ◽

2008 ◽

pp. 209-209-16 ◽

Cited By ~ 8

Author(s):

T Mura ◽

M Taya

Keyword(s):

Residual Stresses ◽

Metal Matrix Composites ◽

Temperature Change ◽

Metal Matrix ◽

Short Fiber ◽

Matrix Composites

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Residual stresses in metal matrix composites

Residual Stresses in Composite Materials ◽

10.1016/b978-0-12-818817-0.00010-x ◽

2021 ◽

pp. 247-278

Author(s):

M.M. Aghdam ◽

S.R. Morsali

Keyword(s):

Residual Stresses ◽

Metal Matrix Composites ◽

Metal Matrix ◽

Matrix Composites

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The Deformation Characteristics, Fracture Behavior and Strengthening-Toughening Mechanisms of Laminated Metal Composites: A Review

Metals ◽

10.3390/met10010004 ◽

2019 ◽

Vol 10 (1) ◽

pp. 4 ◽

Cited By ~ 1

Author(s):

Kuan Gao ◽

Xin Zhang ◽

Baoxi Liu ◽

Jining He ◽

Jianhang Feng ◽

...

Keyword(s):

Mechanical Properties ◽

Metal Matrix Composites ◽

Metal Matrix ◽

Fracture Behavior ◽

Tensile Fracture ◽

Matrix Composites ◽

Deformation Characteristics ◽

Toughening Mechanisms ◽

Metal Composites ◽

Fracture Elongation

Multilayer metal composites have great application prospects in automobiles, ships, aircraft and other manufacturing industries, which reveal their superior strength, toughness, ductility, fatigue lifetime, superplasticity and formability. This paper presents the various mechanical properties, deformation characteristics and strengthening–toughening mechanisms of laminated metal matrix composites during the loading and deformation process, and that super-high mechanical properties can be obtained by adjusting the fabrication process and structure parameters. In the macroscale, the interface bonding status and layer thickness can effectively affect the fracture, impact toughness and tensile fracture elongation of laminated metal matrix composites, and the ductility and toughness cannot be fitting to the rule of mixture (ROM). However, the elastic properties, yield strength and ultimate strength basically follow the rule of mixture. In the microscale, the mechanical properties, deformation characteristics, fracture behavior and toughening mechanisms of laminated composites reveal the obvious size effect.

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