Fatigue SN Legend explanation

Altair Forum User
Altair Forum User
Altair Employee
edited October 2020 in Community Q&A

Hello @ all,

 

I did a Fatigue SN analysis using Optistruct and got the Results which look quite realistic. The only problem i have ist that i don't really get the conclusion of the Contour Plot Damage Legend.

I think the Scale describes the number of steps until an Element breaks down, please correct me if i got this wrong. Normally a crack starts from an Edge of a geometry, but as the Legend in combination with the model results tell me the elements which are colored yellow break down before the red ones do. This seems quite unrealistic to me because the load translation starts at the edge elements. It would be nice if someone could explain that to me, did i understand the legend wrong or maybe the model has some issues.

 

Greetings 

Christian

<?xml version="1.0" encoding="UTF-8"?>fatigue legend1.PNG

<?xml version="1.0" encoding="UTF-8"?>fatigue legend.PNG

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Answers

  • Rahul Rajan_21763
    Rahul Rajan_21763 New Altair Community Member
    edited November 2016

    Please find some relevant information in attached screenshot.The output of Fatigue analysis one would get in to terms of Damage or no of cycles.Means how long part will survive if it is subjected to repetitive load.

    <?xml version="1.0" encoding="UTF-8"?>Life.JPG

    <?xml version="1.0" encoding="UTF-8"?>Damage.JPG

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