考虑连接失效的装配体拓扑和紧固件布局同时优化
Simultaneous topology and fastener layout optimization of assemblies considering joint failure
摘要：
本文提出了一种同时对装配体中的零件及其对应的联接位置进行拓扑优化的方法。其中，接头位置不是离散的和预定义的，而是连续可移动的。底层耦合方程允许连接不同的网格，并避免在关节位置改变时重新划分网格的需要。所提出的方法不仅通过使用单个弹簧元件，而且考虑了关节的大小和类型，对关节位置处的力传递进行建模。考虑铆接或螺栓联接时，联接位置处的局部零件几何由材料包围的孔组成。对于点焊，接头位置填充有材料，并且可能小于螺栓。所提出的方法将这些材料和间隙区到同时运行的零件的拓扑优化。此外，在优化阶段可以考虑接头的故障，从而产生以故障安全方式连接的组件。
英文摘要：
This paper provides a method for the simultaneous topology optimization of parts and their corresponding joint locations in an assembly. Therein, the joint locations are not discrete and predefined, but continuously movable. The underlying coupling equations allow for connecting dissimilar meshes and avoid the need for remeshing when joint locations change. The presented method models the force transfer at a joint location not only by using single spring elements but accounts for the size and type of the joints. When considering riveted or bolted joints, the local part geometry at the joint location consists of holes that are surrounded by material. For spot welds, the joint locations are filled with material and may be smaller than for bolts. The presented method incorporates these material and clearance zones into the simultaneously running topology optimization of the parts. Furthermore, failure of joints may be taken into account at the optimization stage, yielding assemblies connected in a fail-safe manner.
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