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Modeling the Friction Drilling Process Using a Thermo-Mechanical Coupled Smoothed Particle Galerkin Method

机译:使用热机械耦合的光滑粒子Galerkin方法对摩擦钻削过程进行建模

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This paper presents an up-to-date Lagrangian particle method for the analysis of a coupled thermo-mechanical problem in the friction drilling simulation. The method is obtained by a modification of variational equations using the penalized approach to avoid onerous stability problems in conventional Lagrangian particle methods and to obtain semi-discrete equations that are amenable to temporal and spatial integration using the staggered explicit time marching scheme. To deal with the critical numerical limitation associated with large deformation and material separation at the bushing forming stage, the method is furnished with an adaptive anisotropic Lagrangian kernel and a bond-based failure criterion. Representative simulation of a thermal-mechanical coupled friction drilling process is studied, and results are compared with the experimental data to examine the validity of this study.
机译:本文提出了一种最新的拉格朗日粒子法,用于分析摩擦钻削仿真中的热力耦合问题。该方法是通过使用罚分方法对变分方程进行修改来避免常规拉格朗日粒子方法中的繁琐稳定性问题,并使用交错显式时间行进方案获得适合时间和空间积分的半离散方程。为了解决与衬套成形阶段的大变形和材料分离有关的临界数值限制,该方法配备了自适应各向异性拉格朗日核和基于键的破坏准则。研究了热力耦合摩擦钻削过程的代表性模拟,并将结果与​​实验数据进行了比较,以验证该研究的有效性。

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