Mechanical Engineering Journal
Online ISSN : 2187-9745
ISSN-L : 2187-9745
Solid Mechanics and Materials Engineering
Interfacial elastic J  integral for indentation test
Masayuki ARAI
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2018 Volume 5 Issue 6 Pages 18-00360


Recently, the indentation test has drawn attention as a new method for evaluating the interfacial fracture toughness, since its application enables the in-situ measurement using a Vickers hardness tester. An empirical formula for the stress intensity factor or J  integral has been utilized to evaluate the interfacial fracture toughness from the indentation test. However, the method's applicability was restricted to a certain range of material combinations, which motivated this study. The object of this study is to find a general form of the interfacial J  integral that can be applied to a wide range of material combinations. To accomplish this, the J  integral was formulated by solving the interfacial fracture problem of the dissimilar material plate-shaped model with semi-elliptical crack located at the interface that is subjected to an indentation load modeled by point loads. Arbitrary material combinations and crack geometries were considered here. The validity of the J  integral introduced here was confirmed by comparing to the numerical J  integral evaluated by three-dimensional finite element analysis.

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© 2018 The Japan Society of Mechanical Engineers
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