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ushl_LS-Dyna_Fortran

Basics to implement user-defined shell elements (ushl, uel) in LS-Dyna with Fortran

Focus here is on 2D elements for plane strain and axisymmetry, not on actual shell elements

Generalised interface for use of separate element subroutines for 2D plane strain and axisymmetry

If you use a separate subroutine for the element formulation or e.g. AceGen to generate the element routine, I can recommend the general interface stated in "ushl_e101_generalInterface.f".

Numerical examples

The folder "numericalExamples_LS-Dyna" contains examples to test user-shell elements for plane strain and axisymmetry. The folder "userLoading_LS-Dyna" contains the modified subroutine loadud to apply constant pressure on an edge of a shell element to enable plane strain or axisymmetric pressure loading of user-shell elements.

todo

  • function "isNan(*)" is only avaible for ifort compiler, e.g. not for pgi. Maybe use ( a /= 1 ) or ( a == NaN )?

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