# Read the content of the f3d binary file

**URL:** <https://calculix.discourse.group/t/read-the-content-of-the-f3d-binary-file/1970>\
**Category:** Uncategorized\
**Created:** [December 12, 2023, 8:09pm UTC](https://calculix.discourse.group/t/read-the-content-of-the-f3d-binary-file/1970 "2023-12-12T20:09:23Z")\
**Posts on this page:** 7\
**Page:** 1

<div class="post-metadata">

**Author:** ![loghin](https://avatars.discourse-cdn.com/v4/letter/l/9de0a6/32.png) [@loghin](https://calculix.discourse.group/u/loghin)\
**Post date:** [December 12, 2023, 8:09pm UTC](https://calculix.discourse.group/t/read-the-content-of-the-f3d-binary-file/1970/1 "2023-12-12T20:09:23Z")

</div>

I would like to read the content of the f3d binary file. Is there a description of its format?  
Thanks,  
Adrian

---

<div class="post-metadata">

**Author:** ![Calc\_em](https://avatars.discourse-cdn.com/v4/letter/c/43a26b/32.png) [@Calc\_em](https://calculix.discourse.group/u/Calc_em)\
**Post date:** [December 12, 2023, 8:22pm UTC](https://calculix.discourse.group/t/read-the-content-of-the-f3d-binary-file/1970/2 "2023-12-12T20:22:23Z")

</div>

Don’t you mean frd which is results file in CalculiX ? f3d is Fusion 360 format.

---

<div class="post-metadata">

**Author:** ![loghin](https://avatars.discourse-cdn.com/v4/letter/l/9de0a6/32.png) [@loghin](https://calculix.discourse.group/u/loghin)\
**Post date:** [December 12, 2023, 8:56pm UTC](https://calculix.discourse.group/t/read-the-content-of-the-f3d-binary-file/1970/3 "2023-12-12T20:56:07Z")

</div>

Thanks for the reply. I did not expect that CalculiX uses the Autodesk Fusion 360 binary format to write out the finite element solution (displacement, strain, stress components) in the f3d file. Do you know the extension of the Autodesk Fusion 360 results file? I never used Fusion 360. Thank you.

---

<div class="post-metadata">

**Author:** ![Calc\_em](https://avatars.discourse-cdn.com/v4/letter/c/43a26b/32.png) [@Calc\_em](https://calculix.discourse.group/u/Calc_em)\
**Post date:** [December 12, 2023, 9:19pm UTC](https://calculix.discourse.group/t/read-the-content-of-the-f3d-binary-file/1970/4 "2023-12-12T21:19:22Z")

</div>

No, I said that CalculiX uses FRD, not F3D.

---

<div class="post-metadata">

**Author:** ![loghin](https://avatars.discourse-cdn.com/v4/letter/l/9de0a6/32.png) [@loghin](https://calculix.discourse.group/u/loghin)\
**Post date:** [December 12, 2023, 9:44pm UTC](https://calculix.discourse.group/t/read-the-content-of-the-f3d-binary-file/1970/6 "2023-12-12T21:44:34Z")

</div>

I messed up my post. Yes, frd not f3d. That was an unfortunate typo.  
The correct post is: “I would like to read the content of the frd binary file. Is there a description of its format?”

---

<div class="post-metadata">

**Author:** ![Calc\_em](https://avatars.discourse-cdn.com/v4/letter/c/43a26b/32.png) [@Calc\_em](https://calculix.discourse.group/u/Calc_em)\
**Post date:** [December 12, 2023, 10:00pm UTC](https://calculix.discourse.group/t/read-the-content-of-the-f3d-binary-file/1970/7 "2023-12-12T22:00:41Z")

</div>

I see. You can find the description of this format in the CalculiX GraphiX User’s Manual (chapter 11. Result Format): [http://www.dhondt.de/cgx\_2.21.pdf](http://www.dhondt.de/cgx_2.21.pdf)

---

<div class="post-metadata">

**Author:** ![loghin](https://avatars.discourse-cdn.com/v4/letter/l/9de0a6/32.png) [@loghin](https://calculix.discourse.group/u/loghin)\
**Post date:** [December 14, 2023, 1:03pm UTC](https://calculix.discourse.group/t/read-the-content-of-the-f3d-binary-file/1970/8 "2023-12-14T13:03:47Z")

</div>

Thank you. I am all set.