This option is used to either increase or decrease uniformly the mass of the elements in an element set so that the total mass for that set matches a specified value. It can also be used to redistribute the mass among the elements in the element set to raise the minimum stable time increment for that set to a specified target value. Mass can be adjusted for multiple element sets; the mass is adjusted in the order in which the element sets are specified. This behavior influences the final outcome for element sets that share elements. This option can appear only once in an analysis.
Product: Abaqus/Explicit
Type: Model data
Level: Assembly
Set this parameter equal to a default minimum element stable time increment for all of the mass-adjusted element sets. Individualized target time increments can be specified for selected sets, if needed. A nonzero target value causes redistribution of mass within the element sets. If this parameter is omitted, mass redistribution occurs only for element sets for which a minimum element stable time increment value is specified on the data lines.
First line:
Element set label.
Total mass of the element set. If mass is to be redistributed to achieve a target time increment without altering the total mass, enter the “word” CURRENT instead of a mass value.
Minimum element stable time increment for the element set. The default value is 0.0 or the value of the TARGET DT parameter if it is used. When both the TARGET DT parameter and a value for the element set are specified, the value for the element set is used for that set. If neither the TARGET DT parameter nor a value for the element set are specified, no mass redistribution occurs for that set.
Repeat this data line as often as necessary to adjust the mass for different element sets. The same element set label cannot be entered more than once. The mass is adjusted in the order the element sets are specified on the data lines.