Continuous chip formation in metal cutting processes using the Particle Finite Element Method (PFEM)
Continuous chip formation in metal cutting processes using the Particle Finite Element Method (PFEM)
复制标题
金属切削过程中连续切屑形成的粒子有限元方法
DOI：
10.1016/j.ijsolstr.2017.04.030
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发表时间：
2017-08-01
影响因子：
3.6
通讯作者：
Oliver, J.
中科院分区：
文献类型：
--
作者：
Rodriguez, J. M.;Carbonell, J. M.;Oliver, J.
本文介绍了一种特殊的数值技术，粒子有限元法（PFEM）与一个新的修改的时间积分算法，并结合接触算法的能力，金属切削仿真的研究。目标是再现正交加工中连续切屑的形成。本文介绍了如何用PFEM对金属切削过程进行建模，以及开发了哪些新工具来提供成功建模的适当功能。所开发的方法允许处理大变形和热传导，工件-工具接触，包括摩擦效应以及接触的完全热-机械耦合。与变形的网格在高变形区域的变形相关联的困难得到解决，引入新的改进，在连续Delaunay三角剖分的颗粒。在每个新的更新配置处采用自适应插入和移除粒子提高了网格质量，从而允许解决方案的更精细尺度特征的分辨率。该方法的性能进行了研究，一组不同的正交加工的二维试验。从最简单的情况到最复杂的情况，这些例子考虑了对切削条件和不同材料特性的不同假设。实验测试结果进行了比较，显示出良好的竞争力的PFEM与其他可用的仿真工具相比。(C)2017作者由爱思唯尔有限公司发布
This paper presents a study on the metal cutting simulation with a particular numerical technique, the Particle Finite Element Method (PFEM) with a new modified time integration algorithm and incorporating a contact algorithm capability. The goal is to reproduce the formation of continuous chip in orthogonal machining. The paper tells how metal cutting processes can be modelled with the PFEM and which new tools have been developed to provide the proper capabilities for a successful modelling. The developed method allows for the treatment of large deformations and heat conduction, workpiece-tool contact including friction effects as well as the full thermo-mechanical coupling for contact. The difficulties associated with the distortion of the mesh in areas with high deformation are solved introducing new improvements in the continuous Delaunay triangulation of the particles. The employment of adaptative insertion and removal of particles at every new updated configuration improves the mesh quality allowing for resolution of finer-scale features of the solution. The performance of the method is studied with a set of different two-dimensional tests of orthogonal machining. The examples consider, from the most simple case to the most complex case, different assumptions for the cutting conditions and different material properties. The results have been compared with experimental tests showing a good competitiveness of the PFEM in comparison with other available simulation tools. (C) 2017 The Authors. Published by Elsevier Ltd.