[知识分享]RADIOSS block - 焊点的建模
RADIOSS block - 焊点的建模RADIOSS block提供了一些焊点建模的方法，这里介绍由简单建模到复杂建模
1.最简单的我想应该是完全固结，用/RBODY.
2.还可以 用 /PROP/SPR_BEAM来 模拟 焊点。可以 通过定义 拉，剪，弯，扭的参数定义焊点的 各个力学性能。
2. 用/INTER/TYPE2，这里有Spotflag=25 是专门定义焊点的参数，用Spotflag=20，21，22还可以定义焊点的失效
= 0: set to 5; set to 4 if /CAA is activated
= 1: formulation is optimized for spotwelds or rivets
= 2: same formulation as standard formulation. Required when using hierarchy levels. Not compatible with nodal time step /DT/NODA/CST.
= 4: rotational DOF are not transmitted (if shells are used)
= 5: standard formulation
= 20, 21, 22: formulation with failure. Not compatible with nodal time step /DT/NODA/CST. The stress is computed for each slave node according to the "equivalent" surface around the node. The equivalent surface is defined accordingly
= 20: surface computed using shell and brick faces attached to the node.
= 21: surface computed using only the shell attached to the node.
= 22: surface computed using only the brick faces attached to the node.
= 25: penalty formulation
= 30: formulation with cubic curvature of master segment. Not compatible with nodal time step /DT/NODA/CST
3. 用/MAT/LAW59+/FAIL/CONNECT来模拟焊点，他的优点是多于可以用实体单元来模拟每一个焊点，这样能更好的模拟实际受力，焊点的尺寸很小，但是用law59来模拟焊点会避免因为焊点尺寸小而带来的计算步长过小。
工具书 上 Example 48 - Solid Spotweld有 介绍 如何 用 /MAT/LAW59+/FAIL/CONNECT来 模拟 焊点 。
4. 从 V13.0后 还有 用/MAT/LAW83+/FAIL/SNCONNECT来模拟 焊点 ，这个 实际上 是 /MAT/LAW59+/FAIL/CONNECT的 升级版。它可以模拟normal和shear的 耦合。 最后两条，是目前欧美OEM用到的高级功能哦。
牛！ 学习一下！ 谢谢分享
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