Bi-Material Interface Opening Strain Energy/Displacement

  • Last Post 15 December 2018
chmaricle posted this 07 December 2018

Hello, I'm attempting to simulate a steel pressure vessel with a notched defect and composite wrap repair. See the picture below.

I've meshed the assembly in using hex elements with shared topology between the parts. See the mesh below.

I'm trying to get the opening strain energy between the two materials at the notch interface. Basically, I'd like to see if there's a way to simulate the repair separating from the pressure vessel at this notched area. See below.

Right now, since the mesh has shared topology, I suspect there's only one node where the meshes of the two parts meet, which means they won't separate at all and will strain together no matter how much load is put in. Any thoughts on how to best simulate this problem are much appreciated!


apwang posted this 15 December 2018

Hi Craig,


You are right that since shared topology, they share same nodes. There's no interface between the two geometry.

To simulation the separation of the two part, you might consider contact debonding.

Please have a look of this ANSYS video

Hope this could be helpful for you.