How to make my destructible mesh split into debris

I have a destructible mesh(a tank),I want to destruct it by using node"set simulate physics",but it just shook and fly to the sky,and no debris come out.How can I do to let it be destructed and go into debris?Thank you.
TIPS:Event hit is not working either.

First you need to go to the content browser and find that mesh. Then right click and choose create destructible mesh. Then since I guess you are trying to make it fall, then open the destructible mesh and click a box that says enable impact damage. Change impact damage and default to 1 and then click fracture mesh. I hope I answered your question, and that I didn’t mistake it.