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A FreeCAD module that uses Generative Design to design optimally for Additive Manufacturing

License: GNU Lesser General Public License v2.1

Python 100.00%

fembygen's Introduction

FEMbyGEN

A FreeCAD module that uses Generative Design to calculate and show structural analysis results

Background

This project was devoloped based on Rahul Master's thesis and Ogeday Yavuz Graduation Thesis.
František Löffelmann's calculix/beso topology optimization script was added as a feature recently.
The following process image is taken from Master Thesis Poster of Rahul Jhuree:

For more information about Rahul's thesis please view the dissertation.

Requirements

scipy => 1.10.1
FreeCAD => 0.20.0

Installation

Recommended installation of the workbench is via the FreeCAD Addon Manager.
A restart of FreeCAD is required after installation.

Usage

A starter guide exist in forum post

Create a FEM simulation in FreeCAD by using the classical procedure. This file will be your master simulation.
Open FEMbyGEN workbench. Press first toolbar icon for initialization. It will create a spreadsheet which name is Parameters. Open it and write your parameters for different generations.
Click the second toolbar icon to automatically alias parameter names and dimensions all at once.
Assign your aliased dimensions to sketch constraints or any other property fields using the expressions editor.
Click the Generate toolbar icon and then the Generate button to create new generations. Check the generation files by using the provided GUI or simply by clicking its table cell.
Use FEA Generations toolbar icon to generate FEM simulations of all created generations.
Check all results by clicking Show Results toolbar icon. Note: open the generated files by clicking table rows of results GUI. In addition, all results will append to the master file, check tree view for that.

Notes

The addon can also suggest optimum geometry for boundary conditions.

By clicking Create Geo Generations toolbar icon, the ability to choose boundaries such as supports, pressures, forces and the function will create an optimum body.
By clicking the Topology toolbar icon a topology optimization analysis will be executed.

Feedback

Bug reports are greatly appreciated. Please open a ticket in this repository. Please remember to always add your full About info when opening a ticket (and make sure you're using the latest version of the addon). Feature requests can also be requested in this repository. Please consider logging into the FreeCAD forum thread dedicated to the FEMbyGEN addon to discuss your ideas with the devs.

License

LGPLv2.1 (LICENSE)

fembygen's People

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luzpaz omer1911 v-ulkan ahmetozkancanli hidding-dev mvpvipliu s-quirin ibrabdk pakrad1

fembygen's Issues

Add an example file for users to demonstrate aspects of the addon

Add an example file to the repo that users can execute and quickly see a live demo. This is also useful for testing the functionality of the addon to test for potential regressions ?

Update README to reflect auto-installation via Addon manager

Since #39 is already implemented, it would be helpful to notify users that the auto-install method is recommended rather than manual in the README

License file missing in repo

LGPLv2 (as mentioned in the package.xml file) is missing in the repository

Please also add a section in the README called 'License' and link to the file under it. TIA!

package.xml is missing scipy dependency

needs a <depend>scipy</depend> tag
Per https://wiki.freecad.org/Package_Metadata#.3Cdepend.3E

Move top level `icon.svg` in to `fembygen/icons`

declutter the top level directory

Add Prerequisite section to README

What prereqs are needed to run this ? What FreeCAD versions has this been tested on ?

Sample section in README:

Prerequisites

FreeCAD >= x.y.z
scipy >= x.y.z

FEMvtGEN has been tested on etc...etc...

OpenDark / Dark UI visibility problems

On dark user interfaces, e.g. OpenDark by @obelisk some parts are not readable or hard to see:
Icons on the toolbar:

Spreadsheet editor:

Add to FreeCAD Addon Manager

https://github.com/FreeCAD/FreeCAD-addons/issues/new?assignees=&labels=New+WB%2FAddon+%3Apackage%3A&projects=&template=add-a-new-workbench-addon-to-this-repo.md&title=%5BNew+Addon%2FWorkbench%5D

file missing during topology optimization

Windows 11 Pro
FreeCAD 0.21.2
Scipy 1.4.? (anaconda)

(works on Ubuntu 22.04, FreeCAD 0.21.2)

18:52:17  Traceback (most recent call last):
18:52:17    File "C:\Users\...\AppData\Roaming\FreeCAD\Mod\FEMbyGEN\.\fembygen\topology\beso_lib.py", line 654, in import_FI_int_pt
18:52:17      f = open(file_nameW + ".dat", "r")
18:52:17  FileNotFoundError: [Errno 2] No such file or directory: 'C:/Users/../TopologyCase_1\\topology_iterations\\file000.dat'
18:52:17  
During handling of the above exception, another exception occurred:

Note that run optimization creates the other workfiles correctly

Can't change width of bending beam

Hi,

To familiarize myself with this addon I simply tried to change the width of a bending beam, but when I'm at the point 'Generate' -> 'Generate' FreeCAD crashes. If I change the length instead of the width, everything goes fine. I have attached the example.

bending beam.zip

README: Add links to tutorial clips on how to use addon

It would be awesome to have a selection of clips linked to the README for users wanting to 'hit the ground running' with this addon.