Evaluation of Fracture Toughness of Ceramic-Metal Functionally Graded Materials

Abstract:

The main objective of this study is to examine the two dimensional surface crack problems in a system with an interface between two elastic-plastic solids of different yield strength subjected to mode I mechanical loading. The surface cracks growth is considered to occure along the interface direction of bimaterials which is perfectly bonded to each others. A two dimensional finite elementmethod is used to solve the structural problem. Solid 183-node elements are utilized to simulate the strain singularity around the crack front. The crack surface is subjected to a compressive load by three point bending. The stress intesity factors are computed by using the displacement correlation technique. The primary goal is to develop a model crack tip stresses and strains in a manner that is useful for crack growth initiation and propagation in a FGM.

• Periodical: Advanced Materials Research (Volumes 123-125)
• Pages: 971-974
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.123-125.971
• Online since: August 2010
• Authors: Sheikh Md. Rasel, Foisal Ahmed Mirza, Ali Md. Afsar, Jung Il Song
• Keywords: Ceramic, Fracture Toughness, Functionally Graded Material (FGM), Metal, Preceack, Stress Intensity Factor (SIF)

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