FrontISTR v5.7 Release Notes¶

FrontISTR v5.7 Has Been Released!¶

FrontISTR v5.7

• Release date: March 28, 2025
• Changes from v5.6
  • Improvements: 12 issues + 1 merge request
  • Specification changes: 5 issues + 3 merge requests
  • Bug fixes: 15 issues
  • Others: 4 issues

Improvements (1/2)¶

• #594 Changing and Adding Dirichlet Boundary Conditions During Analysis
  • In the existing implementation, the displacement increment at a given step became the Dirichlet boundary condition.
  • By using !BOUNDARY, GRPID=[n], TOTAL, the total displacement value from the initial configuration can be set as a Dirichlet boundary condition (it cannot be used for rotations).
  • Note that the behavior of the default !BOUNDARY remains as before (backward compatible).
• #679 Implementation of the Quasi-Newton Method
  • Nonlinear static analysis can now be solved by the quasi-Newton method.
  • It can be used by setting !NONLINEAR_SOLVER, METHOD=QUASINEWTON.

Improvements (2/2)¶

• #608 Output CONTACT_NFORCE,CONTACT_TFORCE also when !CONTACT, INTERACTION=TIED
• #612 Add OpenMP to the DIAG and SAINV preconditioners
• #581 I/O function for partitioner partitioning information

Elasto-plasticity-related (see !456 for reference)

• #624 Enable setting number of state variables for user defined yield type
• #227 Consistent tangent stiffness for elasto-plasticity (Drucker-Prager, Mohr-Coulomb)
• #623 Add dilatancy angle as input to Mohr-Coulomb and Drucker-Prager

CI-related

• #637 Automatically generate a deb supporting Ubuntu 24.04
• #675 End of support for Ubuntu 2004

(Merge requests without an issue)

• !462 Support for !AMPLITUDE in static analysis
  • !AMPLITUDE can now be applied to boundary conditions such as !BOUNDARY even in static analysis.

Specification Changes¶

• #613 Expand forall into nested do loops
• #626 Change directory structure under hecmw1/src/solver/precond

Build-related

• #652 Preparations for rewriting CMakeLists.txt
• #650 Remove ParMETIS-related parts from the installation script
• #604 Remove descriptions of ParMETIS

(Merge requests without an issue)

• !470 Unify dynamic analysis without contact and with contact
• !472 Minor changes for use as a dynamic library
• !475 Removal of the HECMW cmat structure

Bug Fixes¶

• #606 Argument error in matvec for MPC?
• #609 Fix for incorrect reaction forces being output when embedded constraints are set
• #610 No branching to degrees of freedom {1,2} in hecmw_matvec
• #595 Fixes and improvements to the user-defined elasto-plasticity function
• #619 NR no longer converges when a master element with all-point displacement constraints exists in the degree-of-freedom elimination for contact
• #620 Tests for embedded elements sometimes fail
• #625 Trilinos-15.1.1 cannot be used
• #621 Module defect in hecmw_estimate_condition.F90
• #639 Visualization of nodal temperature
• #647 Message output error when using STATICEIGEN
• #628 Fix "has not been explicitly declared" variables
• #668 !STEP's AMP no longer considered in static analysis

Elasto-plasticity-related (see !456 for reference)

• #593 Defect in Mohr-Coulomb
• #622 Fix input of multilinear hardening for Mohr-Coulomb and Drucker-Prager
• #592 Defect in Drucker-Prager

Others¶

• #614 SSOR_22 does not converge depending on the combination with the solver
• #618 Perform the nonzero check using only the profile in the degree-of-freedom elimination for contact
• #640 Handle incompatible-pointer-types under GCC14
• #602 The URL for inquiries to FrontISTR Commons is forcibly redirected

Acknowledgments¶

• Development cooperation

FrontISTR.git

FrontISTR_manual.git

• The number of commits merged into the release branch in the git repository was counted (Merge commits are not counted)
• Counting command: git log --no-merges [previous release branch]..[current release branch] | grep -e Author | sort | uniq –c | sort –nr
• Notational variations of author names were merged manually

Thank you very much for your cooperation in development