Localization of deformation and formation of residual stresses in metal-matrix composites

2020 ◽  
Author(s):  
Eugene Evtushenko ◽  
Alexander Zemlianov
Keyword(s):  
Residual Stresses ◽  
Metal Matrix Composites ◽  
Metal Matrix ◽  
Matrix Composites ◽  
Localization Of Deformation

Finite Element Modeling for Prediction of Residual Stresses in Fiber Reinforced Metal Matrix Composites

1993 ◽  
Author(s):  
Partha Rangaswamy ◽  
N. Jayaraman
Keyword(s):  
Residual Stress ◽  
Finite Element ◽  
Residual Stresses ◽  
Metal Matrix Composites ◽  
Metal Matrix ◽  
Matrix Material ◽  
Unit Cell ◽  
Experimental Results ◽  
Matrix Composites ◽  
Layer Removal

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.

S102 Residual Stresses in Metal Matrix Composites for Heat Sink Applications During Thermal Cycling

2008 ◽  
Vol 23 (2) ◽  
pp. 188-188
Author(s):  
M. Schöbel ◽  
H. P. Degischer ◽  
T. Buslaps ◽  
M. di Michiel ◽  
T. Poeste ◽  
...  
Keyword(s):  
Residual Stresses ◽  
Thermal Cycling ◽  
Metal Matrix Composites ◽  
Heat Sink ◽  
Metal Matrix ◽  
Matrix Composites
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