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PERMAS-LS Linear Statics

This module allows for linear elastic calculations, based upon the assumptions of small displacements, small strains and linear material behavior (isotropic or anisotropic). Therefore, this module often builds the first step in Finite Element analysis.

  • The following definitions of kinematic boundary conditions are available:
    • Suppressed degrees of freedom,
    • Prescribed degrees of freedom and
    • Linear constraints (MPCs).
  • For free or partially free structures a quasi-static analysis can be performed (Inertia Relief). There, on the basis of a rigid body decoupling the inertia forces are computed which are in equilibrium with the applied forces. Subsequently, a static analysis is performed unter the applied loads and these inertia forces.
  • Different kinds of static loading are available
  • The following primary results are calculated:
    • Displacements,
    • Mass and moments of inertia.
  • From that additional results are derived:
    • Reaction forces,
    • Stresses and stress resultants,
    • Strains,
    • Residual forces,
    • Strain energy density, i.e. mass- or volume-specific strain energy.