An automatic algorithm for mixed mode crack growth rate based on drop potential method

Tumanov, AV and Shlyannikov, VN and Kishen, Chandra JM (2015) An automatic algorithm for mixed mode crack growth rate based on drop potential method. In: INTERNATIONAL JOURNAL OF FATIGUE, 81 . pp. 227-237.

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Abstract

A new automatic algorithm for the assessment of mixed mode crack growth rate characteristics is presented based on the concept of an equivalent crack. The residual ligament size approach is introduced to implementation this algorithm for identifying the crack tip position on a curved path with respect to the drop potential signal. The automatic algorithm accounting for the curvilinear crack trajectory and employing an electrical potential difference was calibrated with respect to the optical measurements for the growing crack under cyclic mixed mode loading conditions. The effectiveness of the proposed algorithm is confirmed by fatigue tests performed on ST3 steel compact tension-shear specimens in the full range of mode mixities from pure mode Ito pure mode II. (C) 2015 Elsevier Ltd. All rights reserved.

Item Type:	Journal Article
Publication:	INTERNATIONAL JOURNAL OF FATIGUE
Publisher:	ELSEVIER SCI LTD
Additional Information:	Copy right for this article belongs to the ELSEVIER SCI LTD, THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, OXON, ENGLAND
Keywords:	Mixedmode cyclic fracture; Drop potential method; Crack growth rate; Test automation algorithm; Equivalent straightline crack
Department/Centre:	Division of Mechanical Sciences > Civil Engineering
Date Deposited:	12 Nov 2015 05:04
Last Modified:	12 Nov 2015 05:04
URI:	http://eprints.iisc.ac.in/id/eprint/52709

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