Stress Wave propagation

[loyal979]

Hi all,

I have simulated a tension test of plate using ABAQUS explicit and the stress strain curve, that I got, has oscillation (stress wave propagation along the plate). I am just wondering how can I get rid or reduce the oscillation?

Curve:
[URL unfurl="true"]https://res.cloudinary.com/engineering-com/image/upload/v1562766804/tips/SSCurve_h8uc5e.pdf[/url]

Thanks

 

[FEA way]

If you can use implicit solver instead of explicit it should solve the problem. Or use increased damping.

 

[loyal979]

Thank you. I won't be able to use implicit for this analysis.
for increasing damping. Do you mean the Viscous damping in the step module?

 

[FEA way]

Not really, I’ve actually meant material damping specified together with other material properties.

 

[Erik Panos Kostson]

Rayleigh damping, so alpha and beta coefficients is what you need.

So: *Damping, alpha=...value, beta=....value
You can do this in the property module also in CAE and in Mechanical/Damping

 

[loyal979]

Thank you both for your help. it did work with defining material damping.

 

[Erik Panos Kostson]

No worries - good that it worked.