ISSN: 1945-7553
CODEN: JTEVAB
Published Online: 1 September 2012
Page Count: 11

Multiple-method CTOA Stable Tearing Characterization of Three Metallic Alloys

Frink, Elizabeth
Kansas State Univ., Manhattan, KS

Lease, Kevin
Kansas State Univ., Manhattan, KS

(Received 24 October 2011; accepted 15 May 2012)

Abstract

Over the past several years, the crack tip opening angle (CTOA) has been identified as one of the most promising fracture parameters with which to characterize low constraint stable tearing and instability in structural metallic alloys. This study presents the results of experimental stable tearing characterizations performed on three typical structural metallic alloys, two aerospace grade aluminums and a titanium alloy. Specific attention is given to the measurement methods used and the correlation between CTOA and δ₅. The effects of the material and the measurement method on CTOA are observed, and a clear relationship is seen.

Keywords:
crack tip opening angle, crack opening displacement δ5, stable tearing

Paper ID: JTE104463
DOI: 10.1520/JTE104463
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