Integration Rules

Integration Rule entities specify user-defined integration points for beam and shell elements.

IRID refers to the integration rule identification number on *SECTION_BEAM and *SECTION_SHELL cards respectively. Quadrature rules in these cards need to be specified as a negative number. The absolute value of the negative number refers to the user-defined integration rule number. Positive rule numbers refer to the built-in quadrature rules within LS-DYNA.

Integration Rules entities have a display state, on or off, which controls the display of the entity in the graphics area.

LS-DYNA Cards

Card Description
*INTEGRATION_BEAM Define user-defined through the thickness integration rules for the beam element.
*INTEGRATION_SHELL Define user-defined through the thickness integration rules for the shell element.