In this paper, the nodal-based continuous-discontinuous deformation analysis method (NCDDAM) is enriched to simulate the thermo-mechanical coupling effects in rock masses. A distance-based contact potential algorithm is first incorporated into NCDDAM to avoid the dependency of element shape and size on the calculation of contact force between different blocks. Then, three types of heat conduction models, which can deal with heat conduction in continuum and discontinuum, are incorporated into NCDDAM to simulate the heat conduction effects of rock masses. Finally, a two-way staggered algorithm is adopted in the context of NCDDAM to simulate the thermo-mechanical coupling effects in rock masses. Several benchmark examples are used to verify the correctness of the enriched NCDDAM in handling contact problems, heat conduction problems and thermo-mechanical coupling problems. The effects of time step size on the accuracy of NCDDAM for both thermal simulation and mechanical simulation are investigated detailly. In addition, the thermal cracking processes of rock masses for both experiment and engineering scales are simulated by the enriched NCDDAM. The numerical results indicate that the enriched NCDDAM is a powerful tool to simulate the thermo-mechanical coupling processes of rock masses.

中文翻译：

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使用基于丰富节点的连续-非连续变形分析方法对岩体中的热机械耦合效应进行建模


本文丰富了基于节点的连续-非连续变形分析方法 （NCDDAM） 来模拟岩体中的热机械耦合效应。首先将基于距离的接触电位算法纳入 NCDDAM，以避免单元形状和尺寸对不同块之间接触力计算的依赖性。然后，将三种类型的热传导模型（可以处理连续和非连续的热传导）引入 NCDDAM 中，以模拟岩体的热传导效应。最后，在 NCDDAM 上下文中采用双向交错算法来模拟岩体中的热机械耦合效应。几个基准示例用于验证丰富的 NCDDAM 在处理接触问题、热传导问题和热机械耦合问题方面的正确性。详细研究了时间步长对热仿真和机械仿真 NCDDAM 精度的影响。此外，通过富集的 NCDDAM 模拟了实验和工程尺度的岩体热裂解过程。数值结果表明，富集的 NCDDAM 是模拟岩体热机械耦合过程的有力工具。