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3D Printing of an imperfect cylindrical shell

Submitted by Nan Hu on

Hi, all.

We are working on 3D printing of an imperfect cylindrical shell and run into couple of issues. Hopefully some of you had seen similar issues before and help us moving on our problem.

How to export Abaqus part and import to CAD or Solidworks?

We build our shell geometry via an odb file of Abaqus, which is a perfect cylindrical shell with superposition of simulated buckling shapes. The reason is because it is not easy to draw directly in the AutoCAD or Solideworks for the geometry we are interested. Thus, we import the odb file directly to the Abaqus model and obtain a orphan mesh model. We tried to export abaqus model from Abaqus but such orphan mesh model did not have geometry. We refer to a python file: 

http://portal.tugraz.at/portal/page/portal/TU_Graz/Einrichtungen/Instit…

and looks promising but running slow.

The other approach we did is to read input file and save XYZ coordinate into a txt file or csv file. In Solidworks, I tried read those XYZ data with the function of curve reading. It actually gives me a similar shape as the connection of all the dots. I'm running into a problem that how to use XYZ data to create a 3D surface in Solidworks? Same question in AutoCAD? 

By the way, our effort is talioring postbuckling behavior with seeded geometry. See our journal paper for a quick look:

http://www.sciencedirect.com/science/article/pii/S0263823114001670#

Thanks!

NH

This problemlooks like surface reconstruction problem. I have heard of plugin in solid works "Scanto3D". See

https://www.youtube.com/watch?v=GrVZR1cldu4

This plugin can be activated if it does not exists.

 

There are other packages which can generate surface from point cloud:

1. Resurf plugin in Rhinoceros : fits NURBS surface to point clouds.

2. Mesh lab :  using "voronoi filtering" algorithm generates facets on the given point cloud.

 

 

Fri, 10/17/2014 - 07:24 Permalink

Thanks for your help! A follow up question is that when import a model to Solidworks or AutoCAD, Abaqus can export multiple file extension, such as ACIS (.sat), IGES (.igs)and STEP (.stp). Do you know which is better from 3D reconstruction. By the way, our model is a cylindrical shell. 

Fri, 10/17/2014 - 11:30 Permalink