Hourglass

Hourglass entities define hourglass and bulk viscosity properties which are referenced via HGID in the *PART command.

LS-DYNA Cards

Card Description
*HOURGLS Define hourglass and bulk viscosity properties which are referenced via HGID in the *PART command

OptiStruct Cards

Defines hourglass control parameters to reduce spurious zero-energy modes in elements with reduced integration.