期刊
EUROPEAN JOURNAL OF MECHANICS A-SOLIDS
卷 60, 期 -, 页码 52-57出版社
ELSEVIER
DOI: 10.1016/j.euromechsol.2016.06.002
关键词
Average circumferential stress; T-stress; Curved crack advance; Mode I stability
类别
资金
- V Plan Propio de Investigacion de la Universidad de Sevilla (Modalidad I.6C)
- Spanish Ministry of Economy and Competitiveness
- European Regional Development Fund [MAT2012-37387, MAT2015-71036-P]
- Junta de Andalucia
- European Social Fund [P08-TEP-04051]
T-stress effects on crack deflection in notched brittle materials are investigated by means of an average stress approach. It is shown that the crack advance always reveals to be straight if the T contribution is negligible. On the contrary, if T is different from zero, the trajectory tends to curve: the higher is vertical bar T vertical bar,the larger is the curvature parameter, its value being either positive or negative depending on the sign of T. Analogies and differences with respect to straight crack propagation are quantified in terms of the fracture loci and of the critical kinking angle. The investigation on the stability of crack deflection under mode I loading conditions concludes the paper, together with a discussion on experimental observations. (C) 2016 Elsevier Masson SAS. All rights reserved.
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