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07-24-2013 02:02 AM

I know it is only possible to use linear elements in sol701, how "dependeable" are linear tetra elements in highly non-linear explicit problems such as drop test crash test etc.?

Thanks.

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07-25-2013 05:33 AM

In fact, Solution 701 only supports linear elements (4-node tetrahedron, 6-node wedge and 8-node brick elements). I strongly suggest to use HEX elements in crash/Drop test since the 4-node tetrahedron is a

Also please note that Tetrahedral elements are spatially isotropic with respect to integration point locations and interpolation functions. In SOL701 for the 4-node tetrahedral element, 1-point Gauss integration is used (for the 10-node tetrahedral element, 17-point Gauss integration is used in SOL601). The 8-node brick element uses 2×2×2 Gauss integration for the calculation of element matrices (the 20-node and 27-node elements use 3×3×3 Gauss integration).

Best regards,

Blas.

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08-04-2013 06:52 AM

Regarding fine mesh and runing time.

I am using the "mass scale factor" and "min T step for mass scale" and "min T scale to remove" in order to get reasonable calculation time (hours instead of weeks...).

But I dont really have a good starting point of how much I can have mass scaling (is 2 OK, maybe 5...? what exactly this factor does?) and which time time step I can remove (if the automatic calculation calculates min time scale to be 1E-12, is it OK to manually set a time scale of 1E-9?).

Any tips on this issue will be greatly appreciated.

Thanks.

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