Design and analysis of novel compression fracture specimen with constant form factor: Edge cracked semicircular disk (ECSD)

Surendra, KVN and Simha, KRY (2013) Design and analysis of novel compression fracture specimen with constant form factor: Edge cracked semicircular disk (ECSD). In: Engineering Fracture Mechanics, 102 . pp. 235-248.

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Abstract

Inspired by the Brazilian disk geometry we examine the utility of an edge cracked semicircular disk (ECSD) specimen for rapid assessment of fracture toughness of brittle materials using compressive loading. It is desirable to optimize the geometry towards a constant form factor F for evaluating K-I. In this investigation photoelastic and finite element results for K-I evaluation highlight the effect of loading modeled using a Hertzian. A Hertzian loading subtending 4 degrees at the center leads to a surprisingly constant form factor of 1.36. This special case is further analyzed by applying uniform pressure over a chord for facilitating testing.

Item Type:	Journal Article
Publication:	Engineering Fracture Mechanics
Publisher:	Elsevier Science
Additional Information:	Copyright of this article belongs to Elsevier Science.
Keywords:	Cracked Brazilian Disk; Semicircular Disk (SD); Photoelasticity; Zeroth Order Fringe (ZOF); Stress Intensity Factor (SIF); Form Factor
Department/Centre:	Division of Mechanical Sciences > Mechanical Engineering
Date Deposited:	18 Jun 2013 11:42
Last Modified:	18 Jun 2013 11:42
URI:	http://eprints.iisc.ac.in/id/eprint/46700

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