收稿日期: 2015-09-08
修回日期: 2015-12-29
网络出版日期: 2016-05-15
基金资助
国家自然科学基金重大项目(41590865)和国家自然科学基金面上项目(41174067)资助
Calculation of thermal stress during the cooling of lava tubes
Received date: 2015-09-08
Revised date: 2015-12-29
Online published: 2016-05-15
李镇村 , 石耀霖 , 张泽阳 , 董培育 , 杨少华 . 熔岩管冷却过程中的热应力计算[J]. 中国科学院大学学报, 2016 , 33(3) : 412 -420 . DOI: 10.7523/j.issn.2095-6134.2016.03.019
In addition to the direct disasters during the volcano eruption, some lava tubes often form in the course of the flow of basic magma. The existence of underground empty caves near the lava tubes reduces the stability of the earth's surface, and then secondary disasters may happen. The lava tubes found on the Moon and Mars not only can be used for further research, but also have been proved to be the best places to build detection base in future. Using the finite element method and based on the formation of the lava tubes, we establish the temperature evolution and the corresponding displacement and thermal stress field conditions. Furthermore, we determine the effects, on the stability of the lava tubes, of different physical parameters (the lava tube size, depth, and shape) by means of analyzing the evolution course of the principal stress.
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