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FrontISTR v5.5 Release Notes

FrontISTR v5.5 Has Been Released!

FrontISTR v5.5

  • Release date: February 24, 2023
  • Changes from v5.4
    • Improvements: 11 issues
    • Specification changes: 3 issues
    • Bug fixes: 14 issues

Improvements

  • #513 A new solver algorithm: SUP-GMRESR and GMRESR-EN
    • It can be used by specifying GMRESR or GMRESREN in the !SOLVER,METHOD option
  • #495 Implementation of smoothed elements
    • The analysis accuracy of tetrahedral first-order elements improves to a level equivalent to hexahedral first-order Fbar elements with the same number of nodes
    • It can be used by specifying the element formulation with !SECTION, FORM341=SELECTIVE_ESNS
    • Sample model: FrontISTR/tests/lib/static_LIB_C3D4_selectiveESNS
  • #92 Addition of TIE contact constraints
    • By internally generating an MPC constraint (TIE constraint) that joins two element faces from !CONTACT_PAIR, the creation of assembly models is simplified
    • It can be used by specifying !CONTACT, INTERACTION=TIED
    • Sample model: FrontISTR/tests/analysis/static/contact_slag_tied_iter
  • #273 Output the eigenvalue values together when doing vtk output of eigenvalue analysis
  • CI-related
    • #473 Create Ubuntu deb files in CI/CD
    • #224 Make the PDF manual be created by CI.
  • Tests added
    • #528 Add a restart test for transient heat conduction analysis
    • #527 Add a restart test for linear dynamic analysis
    • #524 Add a framework for restart tests
    • #509 Add tests for Bbar, Fbar, and IC elements
    • #485 Reorganization of the tests directory

Specification Changes

  • #496 Refactoring of element functions and material functions
  • #267 Issue an error when density is not defined in modal analysis
  • #60 Replace functions that depend on unistd.h and dirent.h (Windows support)

Bug Fixes

  • #526 Stress does not match when using 361 incompatible elements in the restart of dynamic analysis
  • #525 The step time is reset to zero when restarting transient heat conduction analysis
  • #523 Fix for a defect in the duplicate node removal processing of distributed parallel contact analysis
  • #508 Error in incompatible elements
  • #507 Fix for an out-of-range array reference error in 2D modal analysis
  • #502 total_mass computation in the mass matrix computation mass_Shell for shell elements
  • #489 Defect where stress becomes zero in the restart function of dynamic analysis
  • #488 Fix for a defect where division by zero occurs when a debug build is run without specifying restart
  • #481 Fix for a defect where computation does not proceed normally when a thermal stress analysis is run using an anisotropic elastic material and isotropic thermal expansion coefficient
  • #480 Fix typos in the hecmw1 subdirectory
  • #468 Fix for CMAKE FindScalapack
  • #447 make test partially fails with MPICH
  • #435 The number of BEAM_NQM outputs differs between element type "641" and "611"
  • #34 Regarding the output of visualization files for shell elements

Acknowledgments

  • Development cooperation

FrontISTR.git

Author commits
inagaki 60
Kazuya Goto 9
Noriyuki Kushida 8
Naoki MORITA 7
luz paz 6
Yu IHARA 3
hillyuan 2

FrontISTR_manual.git

Author commits
inagaki 3
Michio Ogawa 2
Tetsuo Koyama 2
Naoki MORITA 1

Bug Reports

Author commits
I-sama
T-sama
  • 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