PETRIFY
Solution control and techniques
Beta command
This command is in the beta stage and the format may change over time.
"Optional title"
coid
entype, enid, $t_{on}$, $t_{off}$, multiple
Parameter definition
Description
This command is used to temporarily or permanently turn deformable parts into rigid bodies. Elements in rigid bodies will not affect the critical time step size and the command is typically used to cut the computational cost.
The petrification is activated/deactivated at pre-defined times or on FUNCTION signals (positive value).
Example
Pre-fragmented IED
A pre-fragmented IED is detonated and some of its fragments strike an aluminium planel. All elements are turned rigid after the initial acceleration phase. They are kept rigid until the first fragment approaches the target. The rigid flight time can be significantly reduced by temporarily treating all fragments and the target plate as rigid bodies.
