I am new to Houdini and rigid bodies. I have a wheel(Torus)colliding a wall . I want the impact of the wall to start only after the Wheel(Torus) hits the wall, but the wall starts to collapse from the frame 1.

Need the impact only at the affected area of the wall.

I am attaching the scene file and sequence for Solution.

Thanks in advance.

Regards
Raaghav

I can't really look at your file right now, but the concept is this. Pre-fracture your wall then glue it back together and add it in as a packed primitive RBD object. When your wheel strikes the wall, the glue bonds will break. This way you are not hard coding in any frame # when the fracture occurs because it is already pre-fractured.

There are many tutorials on how to time fracturing with impact data. You can check out this one [vimeo.com] for now or search for more.