Mesoscale simulation of frost damage to rock material based on Rigid Body Spring Method
Mesoscale simulation of frost damage to rock material based on Rigid Body Spring Method
复制标题
基于刚体弹簧法的岩石材料冻害细观模拟
DOI：
10.1016/j.coldregions.2022.103621
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发表时间：
2022-06
影响因子：
4.1
通讯作者：
Tamon Ueda
中科院分区：
文献类型：
--
作者：
Fuyuan Gong;Zhao Wang;Yang Zhou;Jinyuan Wang;Liu Yang;Tamon Ueda
冻害是寒湿地区多孔材料性能劣化的重要因素之一。本文基于刚体弹簧法，对岩石材料的冻融损伤进行了细观数值模拟研究。结合岩石材料的成冰模型，提出了岩石材料的细观弹塑性本构关系。然后，在多次冻融循环（FTC）过程中，选定的大理岩的循环膨胀进行了模拟，导致不同的残余应变值。研究发现，利用残余应变作为冻结过程和力学退化之间的联系，可以成功地解释和再现不同次数FTC后的损伤压缩行为，包括裂纹恢复现象。考虑到岩石材料性质的大变异性，本文的研究结果有利于进一步模拟岩石的冻融破坏历史。
Frost damage is one of the most important deterioration factors for porous materials in cold and wet region. In this study, a mesoscale numerical study is conducted to estimate the frost damage of rock materials based on the Rigid Body Spring Method. The mesoscale elastoplastic constitutive law is presented cooperated with the ice formation model for the rock material. Then, the cyclic expansion of selected marble during multiple freeze-thaw cycles (FTC) is simulated, resulting in different values of residual strain. It is found that using the residual strain as a link between freezing process and mechanical degradation, the damaged compressive behaviors after different numbers of FTC can be successfully explained and reproduced, including the crack recovery phenomenon. The findings in this study are beneficial for the further simulation of frost deterioration history, considering the large variability in properties of rock material.