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Hourglass coefficient

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The hourglass coefficient for type 6 HG control will typically range from 0.1 (default) to 1.0. For elastic material, use 1.0. For other materials, the choice of HG coefficient is not obvious. Even looking at results, it may be difficult to quantify the 'goodness' of the hourglass coefficient used.
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For materials which soften, an hourglass coefficient of 0.1 or less is suggested. ▫ Interesting fact: When used with elastic material and a hourglass.
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For plasticity-based materials, an hourglass coefficient of 0.1 or less is suggested. ▫ Interesting fact: When used with an elastic material and a hourglass ...
The friction contact coefficient is set to 0.3. From impact experiments by Pärnänen et al. [8], the total impact contact time is about 3.5 ms, and the total ...
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by T BELYTSCHKO1984Cited by 669techniques for controlling the hourglass modes in under-integrated hexahedral and quadrilateral ... The nonzero hourglass control coefficients are given by ...
test unit cube for the applicable six forms of hourglass control in LS-DYNA. Note: default values of the hourglass coefficient (QM) were used for each of ...
12 pages·344 KB
Properties ; Control Type (IHQ), ihq, integer ; Coefficient (QM), qm, double ; Bulk Velocity Type (IBQ), ibq, integer ; Quadratic Bulk Viscosity Coefficient (Q1) ...
Hourglass modes are element distortions that have zero strain energy. The 4 node shell element has 12 ... Shell out of plane hourglass coefficient ...

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