June 4, 2023 at 8:09 amZhenhao QianSubscriber
When I fitting the shear relaxation curve, I found I must define the elastic modulus, but I don't know which modulus should I define, Instantaneous modulus or equilibrium modulus?
June 5, 2023 at 3:48 pmJohn DoyleAnsys Employee
Assuming this is a small strain application, the base material can be defined with the instantaneous linear elastic modulus and Poisson's ratio.
If this is a large strain application for a polymer type material, consider defining base material as a hyperelastic strain energy density function.
July 2, 2023 at 8:40 amZhenhao QianSubscriber
Thank you for your reply! And I’ m sorry about my late reply.
I also have some questions
- Would I interpret small strain as the part before plastic stage?
- Before I do stress relaxation test about my material, I do uniaxial compression test to confirm its linear elastic stage. Because as far as I know, the stress relaxation test must ensure that it is within the linear elastic stage of material. Due to limitations, I can only apply load at a low speed (about 10mm/min to 60mm/min), I ‘m not sure how to confirm the linear elastic stage, because before 0.2 strain, the uniaxial curves don’ t seem to be completely ‘ linear‘ . I’ m not sure whether my understanding is correct.
The figure shows the uniaxial compression curves. Red line = 10mm/min, Blue line = 60mm/min.
- 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
- User manual
- An Unknown error occurred during solution. Check the Solver Output…..
- What is the difference between bonded contact region and fixed joint
- 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
- Defining rigid body and contact
- Colors and Mesh Display
© 2023 Copyright ANSYS, Inc. All rights reserved.