Fatigue analysis of composite material

- March 7, 2019 at 4:53 pm
  
  1KarthiKEYAN
  Subscriber
  
  I am currently doing a Flexural & Fatigue analysis of E-Glass/epoxy composite leaf spring. I want to know how to use the fatigue tool for composite curved structure. The results for steel came in fatigue tool but the problem in composite...?
- March 8, 2019 at 4:59 am
  
  Sandeep Medikonda
  Ansys Employee
  
  Hi, You might have to use ANSYS nCode to do this. Please see here.
- March 8, 2019 at 5:31 am
  
  1KarthiKEYAN
  Subscriber
  
  sir, we have only workbench 16.0, while solving fatigue tool we encountered the problem like this image , and the error message is "You have chosen an invalid result for the current analysis'. what's the problem?
- March 8, 2019 at 2:25 pm
  
  Sandeep Medikonda
  Ansys Employee
  
  Karthikeyan,
  
  The Mechanical Fatigue Tool only does SN and EN fatigue, which is typically applied to ductile materials. It does not have any "special" tools for composite materials.
  
  I have seen SN applied to some composites. It can be used if a valid S-N curve can be developed. That approach does not look at fatigue at the micro level. It just assumes that the composite fatigue behavior can be represented by a S-N curve at the macro level.
  
  In your case, click on the Show Errors button in the Mechanical GUI and it will tell the reason why.
  
  Regards,
  Sandeep
  Guidelines on the Student Community
- March 8, 2019 at 4:30 pm
  
  1KarthiKEYAN
  Subscriber
  
  I have also tried the workflow as follows:
  
  ACP -> Static Structural -> ACP post -> and now the model of acp post connected to another static structural. Now when i provide the fatigue tool in solution, the solution is solved...but the acp post results give error..
  
  any comments on this this workflow sir?