Step Time

[ShayanNamazi]

HI, everyone. I am a new member here and also a new user for abaqus. Hope that everyone can help me and I also will try my best to help everyone within my knowledge. Thank you very much

I try to analyse a flow forming model and when I submit a job, after 10 min it says:

"The ratio of deformation speed to wave speed exceeds 1.0000 in at least one element"

I try to decrees step time but noting happen.what should I do to solve this problem?

 

[IceBreakerSours]

You are dealing with an advanced tool (i.e., FEM). You must learn the basics first (static, dynamic etc. analyses using the implicit and the explicit solver). Read the Analysis User's Manual and try as many examples as humanly possible.

Coming to your problem, reducing the increment size is almost always never the answer to your problems. As the message says, the deformation is traveling faster than the wave speed (of sound), which is non-physical and that is why the solver decides to stop the analysis. In all probability, one or more elements are heavily distorted and causing this.

Are you new to this forum? If so, please read these FAQ:

http://www.eng-tips.com/faqs.cfm?fid=376

http://www.eng-tips.com/faqs.cfm?fid=1083