Elastic modulus evolution of rocks under heating-cooling cycles

被引：16
|
作者：
Liu, Weidong [1 ]
Zhang, Liangchi [2 ]
Luo, Ning [1 ,3 ]
机构：
[1] Univ New South Wales, Sch Mech & Mfg Engn, Lab Precis & Nano Proc Technol, Sydney, NSW 2052, Australia
[2] Southern Univ Sci & Technol, Dept Mech & Aerosp Engn, Shenzhen 518055, Guangdong, Peoples R China
[3] China Univ Min & Technol, Sch Mech & Civil Engn, State Key Lab Geomech & Deep Underground Engn, Xuzhou 221116, Jiangsu, Peoples R China
来源：
SCIENTIFIC REPORTS | 2020年 / 10卷 / 01期
基金：
澳大利亚研究理事会;
关键词：
MECHANICAL-PROPERTIES; YOUNGS MODULUS; TEMPERATURE-DEPENDENCE; SANDSTONE; BEHAVIOR; QUARTZ; TRANSITION; CONSTANTS; PRESSURE; GRANITES;
D O I：
10.1038/s41598-020-70920-3
中图分类号：
O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];
学科分类号：
07 ; 0710 ; 09 ;
摘要：
Rocks decay significantly during or after heating-cooling cycles, which can in turn lead to hazards such as landslide and stone building collapse. Nevertheless, the deterioration mechanisms are unclear. This paper presents a simple and reliable method to explore the mechanical property evolutions of representative sandstones during heating-cooling cycles. It was found that rock decay takes place in both heating and cooling processes, and dramatic modulus changes occurred near the alpha - beta phase transition temperature of quartz. Our analysis also revealed that the rock decay is mainly attributed to the internal cracking. The underlying mechanism is the heterogeneous thermal deformation of mineral grains and the alpha - beta phase transition of quartz.
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收藏
页数：9
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