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FrontISTR v5.6 Release Notes¶

FrontISTR v5.6 Has Been Released!¶

FrontISTR v5.6

Release date: May 24, 2024
Changes from v5.5
- Improvements: 9 issues
- Specification changes: 5 issues
- Bug fixes: 14 issues
- Others: 10 issues

#579 Make the direct method usable with the explicit DOF method for contact
- The MPC treatment by the explicit DOF elimination method can now be used even when the direct method is specified for the solver
#599 Added the embedding function for element-composing nodes
- Creates an "Embedding (EMBED) element" that embeds additional elements (a node group) inside the shape of the analysis target
- It can be used by specifying !EMBED PAIR in the mesh file and !EMBED in the analysis control file
- Sample model: FrontISTR/tests/analysis/static/embed_slag_iter
Visualization of the element equivalent plastic strain PL_ESTRAIN
- By specifying PL_ESTRAIN,ON in !OUTPUT_VIS, the equivalent plastic strain at element centers can be visualized
- The content described in Issue #583 is planned to be implemented going forward

#582 Specification change for centrifugal force (allowing negative values)
- By making the angular velocity of the centrifugal force negative, a body force that compresses in the radial direction can be applied
#243 Result output when surface-to-surface contact / MPC is present
- For elements not in the mesh that are generated internally in the case of surface-to-surface contact / MPC, they are no longer output to the result file

CI-related

#564 Creation of a manual regarding CI/CD
#535 Improvements to the automatic generation of the debian package from the perspective of CI/CD

Tests added

#294 Make it easier to change wrapper commands and command-line options when running test cases
#35 Readability of hecmw_result_add
#433 Resolve the problem of large numbers of time-history data files (BOUNDARY, DLOAD) and domain partitioning
#540 Refactoring of solve_LINEQ_iter_contact
#515 Make AMPLITUDE definable in the analysis control file as well

#510 The sign of the trace term of the stress integral in the Updated Lagrangian method
#321 Fixes for geometrically linear elasto-plastic analysis
#560 The download link for the Ubuntu deb is wrong
#576 Problem with DOF-elimination MPC in MPI parallel
#577 Problem when DOF elimination is used for both in a model with contact and MPC coexisting in MPI parallel
#588 Intent errors in the subroutines for smoothed 341
#226 Restart file reading error for ver.5 in the Windows version
#558 Error that hecmw_result_io_{bin|txt}.h is not found at build time
#537 The standard output message of the executable published in Ver.5.5 is still the one from Ver.5.4
#462 rmerge stops with signal 11 when contact and MPC coexist

CI-related

Questions resolved

Duplicate handling and problems from past versions

#569 The Version number of FrontISTR v5.5 is still 5.4
#598 Plastic strain increases abnormally in small-deformation elasto-plasticity
#575 Contact pair names containing lowercase letters are not recognized correctly
#492 Investigation of unifying the time-increment control of dynamic and static analysis

Judged as not needed

FrontISTR.git

FrontISTR_manual.git

Author	commits
Michio Ogawa	3

Bug Reports

Author	commits
K-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