Variation Simulation of Sheet Metal Assemblies Using the Method of Influence Coefficients With Contact Modeling
Variation Simulation of Sheet Metal Assemblies Using the Method of Influence Coefficients With Contact Modeling
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DOI：
10.1115/1.2714570
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发表时间：
2007-06
影响因子：
4
通讯作者：
Stefan Dahlström;L. Lindkvist
中科院分区：
文献类型：
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作者：
Stefan Dahlström;L. Lindkvist
金属板材装配是汽车、飞机等多种产品常用的装配工艺。由于所有制造过程都会受到变化的影响，并且产品需要具有较高的几何质量，因此必须在设计的早期阶段对与几何相关的生产问题进行分析。本文讨论了执行此分析的两种方法。一种相对快速地执行模拟的方法是使用影响系数(MIC)方法在零件偏差和装配回弹偏差之间建立线性关系。但是，此方法不考虑零件之间的接触。这意味着允许部件相互穿透，这可能会影响模拟结果的准确性。本文提出了一种简单的接触建模技术，可以在TO MIC中实现，以避免穿透。接触建模由接触检测和接触平衡搜索算法组成。在实施时，MIC仍然只需要两次有限元分析(FEA)计算。文中描述了接触算法的步骤以及如何将其应用于MIC中，最后通过与商业有限元软件ABAQUS接触算法的比较验证了所提出的接触建模的正确性。
Sheet metal assembly is a common assembly process for several products such as automobiles and airplanes. Since all manufacturing processes are affected by variation, and products need to have a high geometric quality, geometry-related production problems must be analyzed during early design phases. This paper discusses two methods of performing this analysis. One way of performing the simulations relatively fast is to establish linear relationships between part deviation and assembly springback deviation by using the method of influence coefficient (MIC). However, this method does not consider contact between the parts. This means that the parts are allowed to penetrate each other which can affect the accuracy of the simulation result. This paper presents a simple contact modeling technique that can be implemented in to MIC to avoid penetrations. The contact modeling consists of a contact detection and a contact equilibrium search algorithm. When implemented, MIC still only requires two finite element analysis (FEA) calculations. This paper describes the steps in the contact algorithm and how it can be used in MIC and finally the proposed contact modeling is verified by comparing the simulation result with commercial FEA software ABAQUS contact algorithm.