question about the material properties of concrete

- November 29, 2019 at 7:40 pm
  
  sabrina2019
  Subscriber
  
  Hi
  
  i am working on the behavior of FRP confined concrete under axial monotonic compresssion load, i have to model the behavior of concrete so i introduce the stress strain curve for the compression behavior by the model available in anays apdl wich is named multi linear isotropic harding plasticity and i used also the model "concrete" to specify the uniaxial crushing and cracking stress and the shear transfert coefficients
  
  so my problem is ; the solution not converge and it show me error
  
  could anyone hepl me to find solution to my problem
  
  thank you
- December 2, 2019 at 9:11 am
  
  Aniket
  Ansys Employee
  
  ANSYS employees are not allowed to download files from the student community. Can you please attach inline images? Also, what errors do you get in solve.out file?
- December 3, 2019 at 7:13 pm
  
  sabrina2019
  Subscriber
  
  Hi
  
  i try to model only concrete core in order to define the parameters of the behavior of concrete
  
  when i introduce the value of uni axial crushing stress in the model CONCRETE aviable in ansys, the program stop at very early time step and show me an error message, it said that " rigid body motion can also occur when net section yielding has occurred resulting in large displacement for a small increment of load or when a buckling has occurred. you can plot the time history curve for node 97 in the UY direction to check for stiffness (slope of curve) approaching zero".
  
  and when i turrned off the value of crushing stress in concrete model, the solution is done but when i check the stress in Y direction for the inner node at mi hight of the specimen i find the value of the stress higher then the value introduced in ansys.
  
  at the outer node the stress is less than the uni axial crushing stress
  
  thank you
- December 3, 2019 at 9:10 pm
  
  peteroznewman
  Subscriber
- December 4, 2019 at 3:32 am
  
  sabrina2019
  Subscriber
  
  yes it is the error message that ansys show me thank you
- December 16, 2019 at 1:56 pm
  
  Rohith Patchigolla
  Ansys Employee
  
  Hello Sabrina,
  
  As Aniket suggested, we are not allowed to download files from Student Community.
  
  Is it possible to paste your APDL script here for understanding the reason for the error?
  
  Best regards,
  
  Rohith

Viewing 5 reply threads

You must be logged in to reply to this topic.

Ansys Innovation Space

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.

Trending discussions