ISSN: 1945-7553
CODEN: JTEVAB
Page Count: 7

A Compact Specimen for Plane Strain Crack Arrest Toughness Testing

Crosley, PB
Associate research director and presidentMembers of ASTM, Materials Research Laboratory, Glenwood, Ill.,

Ripling, EJ
Associate research director and presidentMembers of ASTM, Materials Research Laboratory, Glenwood, Ill.,

Abstract

A test method is described for measuring plane strain crack arrest toughness K_Ia with a compact shaped specimen. The method has a number of advantages over those previously used. Rather than a fatigue crack for initiation, a machine-notched, brittle weld is used, which reduces testing costs. A very stiff loading system consisting of a wedge and bushing assembly allows for much higher ratios of initiation to arrest toughness than those allowed with pin-loaded double-cantilever specimens. The use of large initiation values is expected to allow for larger K_Ia measurements with modest-sized specimens.

Keywords:
crack propagation, strains, stresses, crack arrest toughness, compact specimen, crack line wedge loaded specimen

Paper ID: JTE10589J
DOI: 10.1520/JTE10589J
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