TAGGED: centerlines, geometryimporttxt, scdm


April 11, 2023 at 9:53 am

April 11, 2023 at 11:06 ampeteroznewmanSubscriber
I don't know of a way to deform a stent in SpaceClaim to so that a straight centerline deforms to the green curve.
I do know that after the stent is meshed and there are nodes that have coordinates, it is possible to deform the nodal coordinates to the green curve.

April 11, 2023 at 11:14 amAyeon HwangSubscriber
Thank you for your answer
Could you explain the way you know?


April 12, 2023 at 12:04 pmpeteroznewmanSubscriber
This a simple example, which is to take a straight stent and “bend” it into a circular arc in the XZ plane. The X axis is horizontal along the axis of the stent, and Z is vertical. Note that X=0, Z=0 at the center of the stent.
In the ds.dat file are all the XYZ coordinates for every node in the mesh. Bring them into a spreadsheet.
I used an equation of a circle of a given radius, tangent to the origin. Given an X coordinate, the equation computes the Z coordinate of the circle. This is called the Sag equation in Optics. I simply used that equation to add an offset to every nodal Z coordinate using that node’s X coordinate. Copy/Paste the new XYZ coodinates back into the ds.dat file and you have a curved stent.
Note that this lateral shift is not a true “bending” of the stent, it is actually a shearing of the shape, but for small values of the Z offset, it is close enough and is really simple. A more precise transformation would have computed the rotation of the crosssection, but that would be more complicated.
For your case of a general 3D spline, you could extend my simple lateral shearing, but in two directions: Y and Z for each axial coordinate X.

 You must be logged in to reply to this topic.
Boost Ansys Fluent Simulations with AWS
Computational Fluid Dynamics (CFD) helps engineers design products in which the flow of fluid components is a significant challenge. These different use cases often require large complex models to solve on a traditional workstation. Click here to join this event to learn how to leverage Ansys Fluids on the cloud, thanks to Ansys Gateway powered by AWS.
Earth Rescue – An Ansys Online Series
The climate crisis is here. But so is the human ingenuity to fight it. Earth Rescue reveals what visionary companies are doing today to engineer radical new ideas in the fight against climate change. Click here to watch the first episode.
Ansys Blog
Subscribe to the Ansys Blog to get great new content about the power of simulation delivered right to your email on a weekly basis. With content from Ansys experts, partners and customers you will learn about product development advances, thought leadership and trends and tips to better use Ansys tools. Sign up here.
 How to work with STL file?
 Rotate tool in ANSYS Design Modeler
 Using Symmetry in DesignModeler and Expanding the Results
 section plane
 ANSYS FLUENT – Operation would result in non manifold bodies
 material properties
 drawing a geometry by importing a table of points
 Geometry scaling
 Coordinates orientation
 “contact pair has no element in it.” how to resolve this problem

5162

3257

2443

1308

956
© 2023 Copyright ANSYS, Inc. All rights reserved.