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FE-MODELING OF THE TOUGHENING MECHANISM IN WHISKER-REINFORCED CERAMIC-MATRIX COMPOSITES

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Title FE-MODELING OF THE TOUGHENING MECHANISM IN WHISKER-REINFORCED CERAMIC-MATRIX COMPOSITES
 
Creator MUKHERJEE, A
RAO, HS
 
Subject silicon-carbide
 
Description Ceramic-matrix-composites (CMCs) are fast replacing other materials in many applications where the higher production costs can be offset by significant improvement in performance. However, due to their lack of toughness they are prone to catastrophic failures. Hence, the important consideration in the design of CMCs is to achieve satisfactory toughening. Recent experimental studies of whisker-reinforced ceramics have shown that substantial improvements in fracture toughness can be achieved via the mechanisms of whisker bridging, whisker pull-out and crack deflection. This paper demonstrates the use of finite element method to model the whisker/matrix interface through isoparametric interface elements. A micro mechanical finite element model which uses isoparametricformulation has been presented. The micro mechanical finite element model is then validated by characterising the non-linear force-displacement response of alpha-SiC ceramic whisker embedded in Al2O3 ceramic matrix and comparing it with the simplified analytical solutions. The FE model is then used to demonstrate the effect of whisker/matrix interface shear strength on the toughening behaviour, and failure modes of SiC whisker reinforced Al2O3(matrix)/SiC (whisker) ceramic composite.
 
Publisher ELSEVIER SCIENCE BV
 
Date 2011-07-25T02:02:27Z
2011-12-26T12:49:13Z
2011-12-27T05:35:01Z
2011-07-25T02:02:27Z
2011-12-26T12:49:13Z
2011-12-27T05:35:01Z
1995
 
Type Article
 
Identifier COMPUTATIONAL MATERIALS SCIENCE, 4(3), 249-262
0927-0256
http://dx.doi.org/10.1016/0927-0256(95)00049-V
http://dspace.library.iitb.ac.in/xmlui/handle/10054/6602
http://hdl.handle.net/10054/6602
 
Language en