LATPRM, POROSITY

Bulk Data Entry This parameter controls the amount of intermediate densities in the model in the first phase of the Lattice Structure Optimization run.

Definitions

Parameter	Values	Description
POROSITY	<HIGH, MED, or LOW>	For lattice cells the homogenized Young's modulus to density relationship is approximated as E = ρPE0, where E0 denotes Young's modulus of the dense material and P is the penalty value. Varying levels of lattice/porous domains in topology results are controlled by the parameter POROSITY which adjusts the penalty (P). HIGH (Default) Generates a relatively high number of intermediate density elements in the first stage of the optimization run. The penalty value (P) is set to 1.0 which is equivalent to no density penalization. MED Generates a relatively medium number of intermediate density elements in the first stage of the optimization run. This option is equivalent to a penalty value (P) of 1.25. LOW Generates a relatively low number of intermediate density elements in the first stage of the optimization run. This option is equivalent to a natural penalty value (P) of 1.8.