期刊
FATIGUE & FRACTURE OF ENGINEERING MATERIALS & STRUCTURES
卷 39, 期 10, 页码 1193-1203出版社
WILEY
DOI: 10.1111/ffe.12422
关键词
four-point bend; granite; stress intensity factor; T-stress; GMTS-criterion
资金
- Open Fund of State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation [PLN1505]
- Science and Technology of Sichuan province [2014JY0002]
- National Natural Science Foundation of China [51074109]
Four-point bend experiments on black granite are conducted. The fracture behaviours of granite under pure mode I, pure mode II and I-II mixed mode are investigated, and the corresponding stress intensity factors K-I , K-II and the non-singular term T-stress are obtained through numerical-experimental method. The results are compared with the theoretical predictions of generalized maximum tangential stress criterion and other conventional criteria. It shows that generalized maximum tangential stress criterion fits the experimental results better for considering the effect of T-stress. Contrasting with other loading configurations, the values of T-stress for asymmetric four-point bend specimens are much smaller, especially for pure mode II specimens, which provide an asymmetric deformation field where the T-stress is approaching zero.
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