How to solve the penetration of rigid body's contact?

At the optistruct I do the rigid body and elastic material's contact.

And my rigid body just modify the young's modulus from 210 GPa to 210*10^15 Pa.

But why I set contact between rigid and elastic material the elastic material will penetrate the rigid body?

like the photo

# Original Model

<?xml version="1.0" encoding="UTF-8"?>

# After a step

<?xml version="1.0" encoding="UTF-8"?>

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OptiStruct

HI,

Which one is the rigid body among them?

Can you interchange the master and slave and try again?

@Prakash Pagadala thanks to your apply.

the green part is elastic material and the red is rigid body.

But here I set the master for the rigid body's surface, at before I have seen the manual told that more stiffness body need to set master.

I will change later. But do you have other suggestion because it will run about an hour for 1 step.

Hi,

Try with PCONT and provide AUTO contact stffness on PCONT. Check if this helps...

@Prakash Pagadala thanks to your apply.

I have already set the PCONT of this analysis. Now my optistruct is analyzing the situation of changing master and slave surface.

image.png.a9f8681c3fdf24ad6e9441bd0551c100.png

@Prakash Pagadala I have changed the contact surface.

It divergent, I will think my problem.

Really thanks for your help.