ISSN: 1945-7553
CODEN: JTEVAB
Page Count: 4

Proposed Standard Arc-Bend Chord-Support Fracture Toughness Specimens and K Expressions

Underwood, JH
Research Engineer, Army Armament Research, Development, and Engineering Center, Benet Laboratories, Watervliet, NY

(Received 6 June 1988; accepted 9 December 1988)

Abstract

Collocation and finite element calculations and limit solutions were used to propose standard geometries and K expressions for measuring fracture toughness with arc-bend chord-support specimens. Polynomial expressions for K were determined for a wide range of crack lengths and for two span-to-depth ratios. The fracture toughnesses of steel and aluminum alloys were measured using the proposed methods and compared with results from existing standard methods.

Keywords:
fracture toughness, test methods, collocation, cylindrical shape

Paper ID: JTE11119J
DOI: 10.1520/JTE11119J
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