Reducing hour glass in blast
Reducing hour glass in blast
(OP)
Hello everyone,
I'm trying to model a concrete member subjected to a blast load. When the model is analysed is shows very high hourglass energy, But when I try to reduce hourglass by using ELFORM 2, -1, -2 some nodes get negative volumes. How could this be resolved
Thank you
I'm trying to model a concrete member subjected to a blast load. When the model is analysed is shows very high hourglass energy, But when I try to reduce hourglass by using ELFORM 2, -1, -2 some nodes get negative volumes. How could this be resolved
Thank you





RE: Reducing hour glass in blast
Have you tried:
1) refining your mesh around the region showing hourglassing (keep an eye on your time step though).
2) checking whether the blast is creating a point or edge load, and if so try and alleviate this.
3) using fully or selectively integrated elements (keep an eye out for shear locking) - although sounds like you might be using these already if you have an issues with negative vols.
http://www.dynasupport.com/howtos/element/hourglas...
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