January 22, 2021 at 4:31 amjli562SubscriberHi,nGood afternoon! I have a question and I really appreciate your help.nI want to simulate a CFRP-reinforced steel plate (a 90mm*500mm steel plate reinforced by 90mm*250mm CFRP sheets both sides), which has a initial small debonding in the middle of the front bonded area. nThere is a fatigue load (vary from 10KN to 100KN in each cycle), the load cycle should be more than 10000. However I don't know how to simulate the 10000-cycles load.nI want to see the debonding condition of the structure when applying this load.nIs it possible to achieve the simulation in Ansys? I know there is a function called cohesive zone material (CZM), which is used to simulate contact debonding condition. Should I use it?.Thanks a lot.nnKind regards,nJingrongn
January 28, 2021 at 5:23 pmSean HarveyAnsys EmployeeHello Jingrong, nThanks for your patience. So if we were to take out the fatigue aspect, then we could model this using either VCCT (has initial damage) or CZM (no initial damage). Right now the material models we have seem to be limited to static cases. In which case, we can model the delamination growth. So if your loads produce sufficient energy to cause strain energy release through delamination, we can account for that. So, if your loading was high enough that produces damage, or exceed the GiC or GiiC, etc. then growth will occur, but if you fatigue loading is very small and you don't get to any appreciable strain energy to cause damage, we would not see the fatigue growth with the models I have used. I am going to discuss further with colleagues and see if we have any suggestions and get back to you shortly. Thank you.nnRegards,nSeann
January 28, 2021 at 5:25 pmSean HarveyAnsys EmployeeHi Jingrong, (). I just @ mentioned you above so you would get notification on this update. Thank you.nnRegards,nSeann
February 3, 2021 at 5:28 amjli562SubscriberHi Sharvey,nnThanks a lot for your reply.nDo you mean you have a static case model of delamination growth? If yes, can I have a look at it? nI'm really interested because my model failed to generate the debonding even under a static load.nThank you!Kind regards,nJingrongn
February 4, 2021 at 4:56 pmSean HarveyAnsys EmployeeHello Jingrong nUnfortunately I am unable to share a model. Some tips to try for czm based contact debonding. n1) Make sure the contact is bondedn2)Make sure analysis settings has large deflection in on with sufficient initial, max, min tip steps using auto time stepping onn3) Have a material with a valid czm model such as separation-distance based debondingn4) Make sure the load is sufficient to introduce damagen5)Use a user defined result expression of CONTNMISC70, CONTNMISC71, CONTNMISC72, CONTNMISC73 ( there is one for each node of the contact element) to plot the damage. (0 undamaged, 1 damaged) To get these results you need to go to analysis settings> output controls>Turn on contact miscellaneous This will help you to visualize if damage is occuringn6) Start with simple model and use displacement based loading to avoid convergence issues that will occur when parts separatenSee if these can help and circle back. Thank you.nRegards,nSeann
- 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.
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.
- Solver Pivot Warning in Beam Element Model
- Saving & sharing of Working project files in .wbpz format
- Understanding Force Convergence Solution Output
- An Unknown error occurred during solution. Check the Solver Output…..
- What is the difference between bonded contact region and fixed joint
- User manual
- The solver engine was unable to converge on a solution for the nonlinear problem as constrained.
- whether have the difference between using contact and target bodies
- material damping and modal analysis
- Colors and Mesh Display
© 2023 Copyright ANSYS, Inc. All rights reserved.