Sorry to send you again since I found several mistakes and here they are:
Got three questions for you:
Q1.
I am using Rifest to assess weld strength now. I use FAT100, Hot spot stress, amplitude spectrum. Got a_BK =1.023 for 5million cycles. I thought I could get a_BK less than 1 if I reduce number of cycles. However, I couldn't even I reduced to 10000 cycles and it still shows a_BK=1.023. Found S_BK_max is a limit, no matter how larger K_BK is. Guess it is for elastic with yield stress limit only?
Q2.
For amplitude spectrum, if I specify S1 is not the largest, I will get different answer for defined the largest S1
Q3.
Are static results shown right since I use hot spot stress?