April 6, 2020 at 10:35 amvagraw13Subscriber
I am not able to implement exact boundary conditions in my analysis of a honeycomb cell which is represented as a representative volume element. I tried using periodic boundary conditions using the concept of remote points and constraint equations, but I'm not sure how correct are those. The results are not making any sense and I'm also getting a warning message regarding the boundary conditions. I also used displacement rather than remote displacement. The simulation was looking good but it gave me around 2000 MPa stress with just an applied displacement of 0.2mm (the material used was Aluminum alloy from ANSYS Engineering Data). Can someone please help me understand the exact/actual boundary conditions which I should implement so that I can complete my analysis soon?
April 6, 2020 at 3:24 pmSaiDAnsys Employee
What are you trying to simulate? Are you trying to simulate a uniaxial tensile test on this honeycomb RVE? If yes, then in what direction? If you are simulating a uniaxial tensile test in x-direction, then the x-displacements of the corresponding nodes on top and bottom edges will be equal to each other. But their y-displacements will probably differ due to lateral contractions.
Please provide additional information about your simulations.
April 6, 2020 at 8:26 pmvagraw13Subscriber
I'm applying displacement (please see the yellow arrow) to compress the HC RVE in the x-direction. Through this, I need to take out the reaction force in the members and equivalent young's modulus (a few more properties). As you mentioned about displacements in the top and bottom edges, I used the constraint equations in which the x-displacement is the same (+1 and -1 coefficient). I'll change the coefficient in y-displacement to be +1 for both the edges so that the amount of top edge displace in +ve y-direction will be the same for the bottom edge in the negative y-direction. But, my question is more about if my applied boundary conditions are correct or not for this scenario because the results are very different from remote displacement then the displacement on the right edge. Or should I apply remote displacement/displacement on the left and right edges? If so, then where should I fix my HC cell? Please help!
- 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?
- Saving & sharing of Working project files in .wbpz format
- An Unknown error occurred during solution. Check the Solver Output…..
- 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.
- What is the difference between bonded contact region and fixed joint
- Massive amount of memory (RAM) required for solve
© 2022 Copyright ANSYS, Inc. All rights reserved.