当前位置: X-MOL 学术Mech. Mach. Theory › 论文详情
Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)
Dynamic computation of 2D segment-to-segment frictional contact for a flexible multibody system subject to large deformations
Mechanism and Machine Theory ( IF 5.2 ) Pub Date : 2021-01-07 , DOI: 10.1016/j.mechmachtheory.2020.104197
Dewei Sun , Cheng Liu , Haiyan Hu

A new formulation is presented to simulate the segment-to-segment frictional contact dynamics of planar multibody systems that are subjected to large deformations and large motions. The contact bodies are meshed via planar elements of the absolute nodal coordinate formulation, which offers a C1-continuous surface representation for contact regions. To maintain the optimal convergence, the mortar method is used to discretize the contact constraints, which are established in an integral form on the nonconforming contact surface. By using Coulomb's friction law, the switch between stick and slip status can be realized. The penalty approach and return mapping algorithm are adopted to enforce contact constraints. The rescale and reconstruction strategy proposed in the previous study of authors is improved to recover the gap functions and the tangential friction force. In the mortar space, the magnitudes of the normal contact force and tangential friction force are discretized via the third-order Hermite interpolation, while their directions are along the normal vector and tangential vector of the contact surface, respectively. Several numerical examples are presented to demonstrate the effectiveness of the formulation.



中文翻译:

变形较大的柔性多体系统的二维段间摩擦接触的动态计算

提出了一种新的公式来模拟承受大变形和大运动的平面多体系统的段到段摩擦接触动力学。接触体通过绝对节点坐标公式的平面元素进行网格划分,提供C 1-接触区域的连续表面表示。为了保持最佳收敛性,使用研钵法离散化接触约束,这些约束以整体形式建立在不合格的接触表面上。通过使用库仑摩擦定律,可以实现粘状态和打滑状态之间的切换。采用惩罚方法和返回映射算法来强制接触约束。作者的先前研究中提出的重新缩放和重建策略得到了改进,以恢复间隙函数和切向摩擦力。在砂浆空间中,法向接触力和切向摩擦力的大小通过三阶Hermite插值离散化,而它们的方向分别沿着接触面的法向矢量和切向矢量。

更新日期:2021-01-07
down
wechat
bug