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      Please click here for a short but important announcement   03/26/17

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Found 4 results

  1. Large rigid wall force problem

    Hi all, I'm doing a dropping simulation and I find the rigid wall force is strange. So I design a simple dropping model for checking. The rigid wall reaction force is also so strange similar to my problem. In the early stage of dropping contact, the rigid wall reaction force is very large, I suspect this large force result. Is it real or due to the rigid wall formulation? Or how to solve this problem? At beginning, the distance between the Box model and the rigid wall is about 4mm, which means there is no initial penetration I think. I have attached my model. The model is very small, it can be solved in minutes. Please help me find out the reason. Thank you. Roy FaceRigidWallPenetration_Example_0000.rad FaceRigidWallPenetration_Example_0001.rad FaceRigidWallPenetration_ExampleT01
  2. Hi all, /RWALL was used for edge drop simulation. However, the penetration was found. The edge had a small initial distance to the rigid wall and a distance was used to define the slave nodes. How to solve the penetration? Roy
  3. Rigid wall (RWALL) in radios

    Hi everyone, I'm new to radioss. I'm trying to solve an drop test analysis in radios.I have solved this by making a 0.1 mm thickness pad as rigid wall. Nut i could not get reaction force or impact load as result. somewhere in this forum i have read that creating rigidwall using RWALL gives reaction forces on the wall. So i want to ask 2 questions listed them below. Kindly answer them in any way you can. Any help is appreciated 1) Is there some way that i can get reaction forces for the current setup ( pad 0.1 mm as rigidwall) ? if yes, please be kind and let me know how i can do that. 2) If rigidwall (RWALL) is good option, hoiw do I create it? if any of you have any study material or link that you can share, please do. I'm in trouble with this one.
  4. Rigid Wall question

    In an impact simulation, when we use a moving rigid wall with a velocity, does the mass of rigid wall affect your results? I saw in a rupture plate ball example that we should use a non zero mass for the R wall to avoid the 99% energy error so the example used 5g mass. If they used say 500 kg mass or 1 g mass , will the stress results differ? Thanks,
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