Interpret results

- July 5, 2019 at 2:51 pm
  
  mekafime
  Subscriber
  
  Hi everybody ,
  
  How could I interpret Ansys' results in von mises stress? For when I calculate the structure and the union according to the formulas indicated in the standard I get everything "OK", however the resulting as appreciated stress exceeds the permissible stress of the material.
- July 5, 2019 at 6:01 pm
  
  peteroznewman
  Subscriber
  
  Just because the surface stress has exceeded the material yield point does not mean the joint has failed. Maybe the standard looks at the average stress in a section, I don't know which standard you are talking about. The average stress through the wall thickness at the point you have labelled is much lower than the surface stress value shown on the label.
- July 5, 2019 at 8:14 pm
  
  mekafime
  Subscriber
  
  Hi Peter,
  
  I use Cidect, for the lower element:
- July 5, 2019 at 8:19 pm
  
  peteroznewman
  Subscriber
  
  I don't know what Cidect is.
- July 5, 2019 at 8:51 pm
  
  jj77
  Subscriber
  
  Not sure about cidect, but typically EC3 for ultimate limit states are governed by equations giving say N1.Rd (or Nc,Rd for axial force in beams or Mc,Rd for bending and so on) which is the maximum force or moments (they are not based on VM stresses).
  
  Thus to kind of compare, one could look at the ultimate load of these welded joint. So including plasticity, push the joint and obtain the load displacement curve.
  
  See here for an example (codes tend to be more conservative than the full NL FEA):
  
  http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-78252015001102143
- July 5, 2019 at 9:01 pm
  
  mekafime
  Subscriber
  
  Hi,
  
  Cidect is similar to EC3. Thanks,

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