April 18, 2018 at 1:23 pmtrayCSubscriber
I am trying to squeeze a hyperelastic mooney rivlin material sphere through a cylinder which gets slightly narrower, I was wondering if anyone had any tips that could my results converge?
At the moment my results are unable to converge.
April 18, 2018 at 2:46 pmpeteroznewmanSubscriber
I ran your model in 18.2 and it ran without problems and finished in 108 increments.
I have some other suggestions for changing the boundary conditions, and possibly using symmetry. It would help if you could describe the results you want to obtain from the model. I don't currently have 18.0 but I have an old machine that I will install it on.
April 21, 2018 at 2:07 am
April 21, 2018 at 2:35 ampeteroznewmanSubscriber
A plane intersecting a sphere constructs a circle. A part of a circle is an arc. The arc has an arc length and end points. If the plane is through the center, and the arc has 180 degrees of span, then the distance between the end points is the diameter. When a sphere is compressed, the arc length is shortened and the diameter is reduced.
When you say you want to "measure the change in length across an edge on the sphere", I don't know if you mean the change in arc length or the change in diameter. Please clarify.
April 25, 2018 at 2:27 amtrayCSubscriber
I meant the change in diameter. This is because i want to compare the deformation in finite element analysis to an experiment that was conducted in real life, where a photographic method was used to measure 6 different diameters of a newborns head after passing through the vaginal canal.
April 25, 2018 at 6:17 ampeteroznewmanSubscriber
Okay, just create two deformation probes on two points on opposite sides of the head. The points should have about the same Y and Z coordinates, but opposite X coordinates. The difference in X coordinate is the initial diameter. Then during the solution, you can plot the X deformation of each point. The difference in X deformation of the two points is the change in the diameter.
- You must be logged in to reply to this topic.
Simulation World 2022
Check out more than 70 different sessions now available on demand. Get inspired as you hear from visionary companies, leading researchers and educators from around the globe on a variety of topics from life-saving improvements in healthcare, to bold new realities of space travel. Take a leap of certainty and check out a session today here.
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.
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 calculate the residual stress on a coating by Vickers indentation?
- An Unknown error occurred during solution. Check the Solver Output…..
- Saving & sharing of Working project files in .wbpz format
- Solver Pivot Warning in Beam Element Model
- Understanding Force Convergence Solution Output
- Colors and Mesh Display
- whether have the difference between using contact and target bodies
- The solver engine was unable to converge on a solution for the nonlinear problem as constrained.
- Massive amount of memory (RAM) required for solve
- What is the difference between bonded contact region and fixed joint
© 2022 Copyright ANSYS, Inc. All rights reserved.