Learning Forum

[louiee1907]

Hi,

I did a drop test analysis of the landing gear in LS-DYNA. It lasts 0.2 seconds. I'm considering performing a time-step analysis in nCode, but should I only take the final second, or should I include the intermediate times in the time-step as well?

[danielshaw]

Do the intermediate times create stress cycles?  Probably not, so the probably do not produce fatigue damage.

[louiee1907]

I did time-step fatigue analysis, and I used last solution where is in 0.2 seconds, there was no any cycle. However, when I used all the solution(0.05, 0,07,0.1.. 0.2), the cycle was 4678. 
I think, intermadiate times produce the fatigue damage, but I did not be sure. It is true or not.

[louiee1907]

Is there any recommend for this analysis?