Question

Q4 (A) A steel alloy connection plate is subjected an axial cyclic stress, o, with a spectrum per hour is shown as follow 1500 1200 900 1 2 600 300 time One repetition The S-N curve of the steel alloy at om- 0 can be described by , 1937(2N)-0.0762 (where oa is in MPa) _ Define the life time (days) of the connection plate. [15 marks]

How can I use rain-flowing counting in this case?

Answer 1

Too u vanaions WAM Sle how 12 DD Struss FOixt fiuztonatery lorads: andpstude of stbucs opectian Vmar-etin Va= 1200-0 GoD MPa Ja 2 Second frtualy lradr 300 oMPa we sh ould ake Maximum pemicsile buy C600, 300) MPa Mar 600 MPa 00462 C 1939 2N Given

-O.O762 1937 (2ND -0.0762 937 (2N) ID0762 307=2N) Fiait-uhir D0762 3.228 2N) N 2390430 8 Cycles 2790430 8 hrs 1004 23807 2789 9 his 20 278D9 days 91.2 days A Guveneasumsthou