CM2 FEM® Engines /release 4.2.2

by | Apr 10, 2017

  • 4.2.2
  • April, 2017
  • All CM2 FEM® Engines
  • Minor release of the CM2 FEM® Engines
  • Bug-fix update. Client applications need not to be recompiled against this update.



/new features



rigid_body_lin, rigid_body_gNL

  • Reduced memory usage with numerous slave nodes.



  • Crash with mass_matrix_only_flag = true (regression in 4.2.1).

solver_modal, solver_modal_gyroscopic, solver_buckling_Euler

  • Convergence issues (regression in 4.2.1).

contact_cylinder<, contact_sphere

  • Geometric stiffness no longer disabled in case radius < 0.
    For stability reasons, still disabled in case radius > 0.
  • Convergence issues in case of prescribed displacements (with solver_static_Newton).

rigid_body_lin, rigid_body_gNL

  • The penalty factor used in these elements could be too high and cause noticeable numeric errors and convergence issues.
    They are now more adapted and numeric errors are reduced.


  • Convergence issues in case of prescribed displacements (with solver_static_Newton).
  • Convergence issues with solver_static_Newton (the geometric stiffness was disabled).

/breaking changes


  • Initial solution data_type::initial is no longer considered as periodic.
    It’s used only now in the computation of the tangent stiffness matrix with non-linear models.
  • Dirichlet conditions (prescribed values), thermal loads and pre-strains are no longer not considered in RHS.

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