Article Number: 98 | VC6 | VC5 | VC4 | VC3 | Post Date: August 17, 2020 | Updated: August 17, 2020
I have a t-bone impact simulation where there’s too much interpenetration in the secondary impact phase. How can I improve my model of this impact?
Occasionally, with t-bone collisions, as the vehicles rotate into one another after the initial impulse exchange, the automatic placement of the secondary impulse centroids can be placed in the middle of the overlapping lateral volumes. In such cases, you may want to simply enforce a single secondary impulse exchange occur toward the rear corners of the vehicles, which can then guarantee vehicle separation. Before proceeding, we recommend you familiarize yourself with collision impact modeling in Virtual CRASH by reading the various post at this link.
Perhaps the easiest way to reduce inter-penetration is to reduce the depth of penetration value in the ees object. If this doesn’t help, then customizing the impulse exchanges during the secondary contact is the next best option. Secondary impulse exchanges can be customized by either modifying the time and position of one or more of the secondary impulses in the auto-ees menu, or by using the EES Impulse tool. In the video below, we demonstration how to use the EES Impulse tool to create a secondary impulse exchange toward the rear of the vehicles, thereby enforcing post-impact separation. Note, in the video below, the EES Impulse tool could have been used for the first primary impulse exchange as well.
The final simulation is shown in the video below.
Tags: EES Impulse, secondary contact, too much overlap, overlapping, second slap, secondary slap.
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