# Interface to Frontistr **URL:** \ **Category:** Feature Requests\ **Created:** [July 26, 2026, 10:18pm UTC](https://prepomax.discourse.group/t/interface-to-frontistr/3585 "2026-07-26T22:18:51Z")\ **Posts on this page:** 6\ **Page:** 1
**Author:** ![vitluc](https://avatars.discourse-cdn.com/v4/letter/v/a88e4f/32.png) [@vitluc](https://prepomax.discourse.group/u/vitluc)\ **Post date:** [July 26, 2026, 10:18pm UTC](https://prepomax.discourse.group/t/interface-to-frontistr/3585/1 "2026-07-26T22:18:51Z")
Frontistr is an open source parallel solver developed in Japan. Its input format is abaqus-like and can be use in add-on to Freecad, like calculix. I found a presentation (in Japanese) developed by structia LLC (structia.jp) and it seems promising. Anyone has more information? > **[20250711\_FrontISTR%E7%A0%94%E7%A9%B6%E4%BC%9A\_PrePoMax%E6%B4%BB%E7%94%A8.pdf](https://structia.jp/download/20250711_FrontISTR%E7%A0%94%E7%A9%B6%E4%BC%9A_PrePoMax%E6%B4%BB%E7%94%A8.pdf)** > > 6.95 MB ---
**Author:** ![FEAnalyst](https://yyz2.discourse-cdn.com/free1/user_avatar/prepomax.discourse.group/feanalyst/32/688_2.png) [@FEAnalyst](https://prepomax.discourse.group/u/FEAnalyst)\ **Post date:** [July 26, 2026, 10:47pm UTC](https://prepomax.discourse.group/t/interface-to-frontistr/3585/2 "2026-07-26T22:47:16Z")
Yeah, FreeCAD has add-on workbench for this solver: [https://wiki.freecad.org/FEM\_FrontISTR\_Workbench](https://wiki.freecad.org/FEM_FrontISTR_Workbench) ---
**Author:** ![synt](https://yyz2.discourse-cdn.com/free1/user_avatar/prepomax.discourse.group/synt/32/4658_2.png) [@synt](https://prepomax.discourse.group/u/synt)\ **Post date:** [July 27, 2026, 4:09am UTC](https://prepomax.discourse.group/t/interface-to-frontistr/3585/3 "2026-07-27T04:09:36Z")
hi, thank you for share link of presentation and interface too PrePoSTR to download Distributed publicly as opensource in [GitHub](https://github.com/mitsumega-working/PrePoSTR) and hopefully the integration with PrePoMax become feasible. Indeed, FrontISTR look promising as promoted to be fast solver like it shown in presentation to cut almost half in time of contact analysis. ---
**Author:** ![FEAnalyst](https://yyz2.discourse-cdn.com/free1/user_avatar/prepomax.discourse.group/feanalyst/32/688_2.png) [@FEAnalyst](https://prepomax.discourse.group/u/FEAnalyst)\ **Post date:** [July 27, 2026, 8:45am UTC](https://prepomax.discourse.group/t/interface-to-frontistr/3585/4 "2026-07-27T08:45:09Z")
In [this thread](https://forum.freecad.org/viewtopic.php?t=58019), there are some interesting benchmarks comparing CalculiX and FrontISTR. For example: ![image](https://global.discourse-cdn.com/free1/uploads/prepomax/original/2X/9/9b39b1cc188b1d8a85f7bab8239838c6d4cd24ce.png) ---
**Author:** ![synt](https://yyz2.discourse-cdn.com/free1/user_avatar/prepomax.discourse.group/synt/32/4658_2.png) [@synt](https://prepomax.discourse.group/u/synt)\ **Post date:** [July 27, 2026, 11:42am UTC](https://prepomax.discourse.group/t/interface-to-frontistr/3585/5 "2026-07-27T11:42:21Z")
the treads link of chart benchmark seems inactive, but i guess it’s a simple linear elastic analysis since original FC treads lack of benchmark in contact analysis i’m interested. ---
**Author:** ![FEAnalyst](https://yyz2.discourse-cdn.com/free1/user_avatar/prepomax.discourse.group/feanalyst/32/688_2.png) [@FEAnalyst](https://prepomax.discourse.group/u/FEAnalyst)\ **Post date:** [July 27, 2026, 11:49am UTC](https://prepomax.discourse.group/t/interface-to-frontistr/3585/6 "2026-07-27T11:49:39Z")
Old links to FreeCAD forum just need removing “web” from the address (now it’s [forum.freecad.org](http://forum.freecad.org) instead of [forum.freecadweb.org](http://forum.freecadweb.org)): [https://forum.freecad.org/viewtopic.php?f=3&t=58671&p=504665](https://forum.freecad.org/viewtopic.php?f=3&t=58671&p=504665) The FreeCAD file is also provided.