How to model the contractive behavior of soil in a heating test
How to model the contractive behavior of soil in a heating test
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DOI：
10.1016/j.undsp.2016.05.001
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发表时间：
2016-09
影响因子：
6.4
通讯作者：
Feng Zhang;Yuhei Kurimoto
中科院分区：
文献类型：
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作者：
Feng Zhang;Yuhei Kurimoto
本文通过数值模拟方法对土壤的热力学行为进行了研究，将THM耦合有限元分析作为边值问题（BVP）。本文的主要目的是确定的必要性，模拟一种现象称为“体积收缩的软粘土由于加热”，通过引入一些额外的参数，在热弹塑性模型中进行THM分析。基于模拟，确定了加热试验只是一个边值问题，并且该现象仅仅是边值问题的平均行为，而不是土的固有特性。基于任何材料在加热时都会膨胀的普遍规律，没有必要在适当组织的热弹塑性模型中引入额外的参数来描述这种现象。研究结果可为有兴趣模拟土壤热力学行为的研究人员提供有用的见解。
In this paper, the thermodynamic behavior of soil was observed in well-known heating tests via a simulation, which included THM-coupled finite element analysis as the boundary value problem (BVP). The primary purpose of the paper was to identify the necessity to model a phenomenon called ‘the volumetric contraction of soft clay due to heating’ by introducing some extra parameters in the thermo-elastoplastic model in which the THM analyses were conducted. Based on the simulation, it was determined that the heating test is only a BVP, and the phenomenon is simply an average behavior of the BVP, not an inherent property of soil. Based on the universal rule that any material will expand when heated, it is not necessary to introduce an extra parameter into a properly organized thermo-elastoplastic model to describe the phenomenon. The results may provide a useful insight for researchers who are interested in modeling the thermodynamic behavior of soils.