Study on dynamic response characteristics of impact of freeze-thaw saturated marble in plateau area

Wuhu Huang, Jiandong Yin, Xianglong Li, Defeng Hou, Jianguo Wang, Zhiping Zhang, Ting Zuo, Ximing Jian, Wendong Li and Yang Yang

PLOS ONE, 2023, vol. 18, issue 9, 1-18

Abstract: To study the effects that the perennial freeze–thaw environment exerts on the dynamic mechanical properties of marble, which characterizes the Qinghai-Tibet Plateau, impact tests were conducted, and saturated marble was utilized; thus, we analyzed the effect of different loading rates on its dynamic compressive strength, fragmentation pattern, and energy-absorbing density. The results indicate the following: (1) When 42.02s-1 ≤ε˙≤ 49.20s-1, the degree of fragmentation and the fractal dimension of saturated state marble is greater than that of the dry state marble; when ε˙ 49.20s-1, the dry state marble exhibits greater fragmentation than the saturated marble; (2) When the saturated state marble is subjected to a specific fractal dimension, the energy-absorbing density of the marble that characterizes the saturated state is great compared with the dry state, and when the fractal dimension increases, the energy-absorbing densities that characterize the two states gradually converge. (3) The effect of water on the mechanical properties of marble has an obvious rate dependence, showing a weakening effect at low strain rates and a strengthening effect at high strain rates. In regard to the analysis pertaining to the dynamic fracture mechanism of marble under the influence of the freeze-thaw environment that characterizes the plateau, the aforementioned experimental results exhibit considerable significance.

Date: 2023
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Persistent link: https://EconPapers.repec.org/RePEc:plo:pone00:0290628

DOI: 10.1371/journal.pone.0290628

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