# JM Desrosiers

Members

31

1. ## How to stop an RIGID impactor that was lauched by initial velocity

Hi, I'm new to hypermesh and I have a simple question. Can I stop a component (impactor in my case) that was lauched by an initial velocity. I really need to keep the initial velocity. The problem is that the impactor is a rigidbody. I don't want to use another component which would be deformable to stop the impactor. I just want to stop it at a certain distance from its original position. I'm looking in the BCs, but I don't find anything that suits me. Thanks!
2. ## 1D element spring as real springs

Hi, I'm new to hypermesh and I have a simple question for you guys. Can we use a spring element to act like a real coil spring? In fact, I got an impactor hitting a dummy and in the real experiment, the impactor is stopped at a certain distance from it's initial position by a coil spring. I wanted to use a imposed displacement, but I need to keep the initial velocity to allow the impactor to slow down by transferring its energy to the dummy. So, I thought that maybe I can stop the impactor (which is rigidbody) by a spring element like it is in real experiment. Can I do that? Or is there something else I could do? So far, I wasn't able to use the spring correctly. Thank you very much!
3. ## Time history node - Y intercept not equal to zero

Oh ok the dummy is not supposed to move before the actual impact (hit by an impactor) but i'll take a look! Thanks!
4. ## Time history node - Y intercept not equal to zero

Hi everybody, I have a problem while I'm using a time history node to obtain the agular velocity at a specific area in my model. The problem is that in hypergraph, the Y-Intercept (at time = 0) is not equal to zero as it should be. In fact, my model is a simple impact and at time = 0, the impact has not started yet, but my agular velocities in every plane is not equal to zero (1.57143). is it a filter that I need to use? or something like that? Thank you! CompletT01