Journal
PROCESSES
Volume 7, Issue 2, Pages -Publisher
MDPI
DOI: 10.3390/pr7020070
Keywords
water-rock interaction; degradation mechanism; mixed mode fracture resistance; fracture criteria; T-stress
Categories
Funding
- National Natural Science Foundation of China [11872042]
- Sichuan Science and Technology Program [2018JY0024, 2019YJ0156]
- Postdoctoral Research Foundation of Sichuan University
Ask authors/readers for more resources
Water-rock interactions can significantly deteriorate the physical and mechanical properties of rocks, and it has been identified as one of the significant factors influencing the stability and safety of structures in rock-soil engineering. In this study, the fracture mechanical properties of sandstone under periodic water-rock interactions and long-term immersion have been studied with central cracked Brazilian disk specimens. The degradation mechanism of water-rock interactions was also studied using a scanning electron microscope (SEM). Finally, the generalized maximum tangential stress and generalized maximum tangential strain criteria were adopted to evaluate the experimental results. The results show that periodic water-rock interactions can remarkably affect the fracture resistance of sandstone. With the increase in the number of cycles, the pure mode I, pure mode II, and mixed mode fracture toughness decreases greatly, however, the values of K-If/K-IC and K-IIf/K-IC decrease slightly. Furthermore, the fracture resistance of sandstone influenced by cyclic wetting-drying is more significant than long-term immersion. Moreover, the fracture criteria, which considers the effect of T-stress, can reproduce the test results very well.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available