Numerical Analysis of Three-Dimensional Semi-Elliptical Interfacial Cracks Subjected to Indentation Load

N. Kurihara; Masayuki Arai

doi:10.4028/www.scientific.net/KEM.627.289

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HomeKey Engineering MaterialsKey Engineering Materials Vol. 627Numerical Analysis of Three-Dimensional...

Numerical Analysis of Three-Dimensional Semi-Elliptical Interfacial Cracks Subjected to Indentation Load

Abstract:

The aim of this study is to show elastic J-integral needed to evaluate the interfacial fracture toughness of bi-material in indentation test. Three dimensional J-integrals along the crack front tip in semi-elliptical crack lying on the interface were analyzed using domain integral technique installed in commercialized finite element code MARC. The J-integral was calculated under several kind of aspect ratio of semi-elliptical cracks. In order to have to evaluate the interfacial fracture toughness from interfacial crack length and indentation load obtained in indentation tests, the analytical formula for two dimensional interfacial crack J-integral under plane stress, which had been introduced by J. R. Rice and G. C. Sih, was modified in reflecting upon the three dimensional effect. Finally, the indentation test was conducted for Aluminum alloy/ PMMA combination sample, and the associated fracture toughness was evaluated.Fig.1 Schematic illustration of indentation testFig.2 Schematic illustration of analysis mode

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Periodical:

Key Engineering Materials (Volume 627)

Pages:

289-292

DOI:

https://doi.org/10.4028/www.scientific.net/KEM.627.289

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Online since:

September 2014

Authors:

N. Kurihara*, Masayuki Arai

Keywords:

Indentation Test, Interfacial Fracture Toughness, Test Standardization, Thermal Barrier Coatings

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References

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