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- Title
On the decay of fracture toughness of sandstone subjected to freeze–thaw cycles.
- Authors
Wei, Mengxi; Qiao, Lan; Li, Qingwen; Deng, Naifu
- Abstract
In cold regions, progressive cracking, caused by freeze–thaw cycles, plays an important role in deteriorating engineering rock mass. Employing central cracked Brazilian disks (CCBDs) of sandstone, this paper aims at investigating the variations of falling rate among different modes of fracture toughness exposed to freeze–thaw cycles and the applicability of fracture criterion in predictions. Results revealed that different modes of fracture toughness exhibited comparable descending trends after varied freeze–thaw cycles. There was an agreement between the predictions via the generalized maximum tangential stress criterion (GMTS) and the test results. In specified conditions, the GMTS criterion incorporating fracture process zone of 0 freeze–thaw cycle can be applied to estimations for different freeze–thaw cycles. With increasing freeze–thaw cycles the fractal dimensions of mode I and mixed‐mode I–II fracture surfaces displayed a growing trend, indicating that the fracture surfaces became rougher and more complicated. Highlights: Falling rates of fracture toughness of sandstone after freeze–thaw cycles were studied.The generalized maximum tangential stress criterion offered viable predictions.Fracture process zone had limited effects on fracture locus in specified conditions.Mode I and mixed‐mode I–II surfaces became rougher with growing freeze–thaw cycles.
- Subjects
FREEZE-thaw cycles; FRACTURE toughness; SANDSTONE; FRACTAL dimensions; COLD regions
- Publication
Fatigue & Fracture of Engineering Materials & Structures, 2023, Vol 46, Issue 12, p4465
- ISSN
8756-758X
- Publication type
Article
- DOI
10.1111/ffe.14144