Learning Forum

[tinsaegbehaga]

Hi,
I’m running simulation on Static Structural and seeing unrealistic deformation. The model is a stack of thin-film layers with different thicknesses and material properties. I ran a thermal analysis on Thermal–Electric tool and imported those results into Static Structural to study thermal-expansion mismatch effects.
However, I’m getting a warning: “The maximum contact stiffness is too big.” and also the result I saw is not realistic. I tried adjusting the normal stiffness control from Programmable to Factor in specific contacts and tested different values, but the issue still persists.
Could anyone help me on this?

Thanks

[Subhash Tadala]

This warning occurs when normal contact stiffness (FKN) is higher than 10^16.
Can you check if changing the unit system is helping to avoid this issue ?

 

 

[tinsaegbehaga]

Thank you for the response. I have created the geometry again in meters when I do the thermal anlysis in thermal electric and use Pa when I insert youngs modulus values in my stress analysis in static structural. But the issue still persists. Is there any other thing I need to check?