hi
i hope this forum is not only for professional but students who they are interested in stress also can participate.
im a doing my college project in piping stress analysis.i could not find any other place to post my doubts better than this,as i know Caesar5 is the software using worldwide for stress analysis.
i went through some stuffs i downloaded form Net and some codes and standard .i cant understand anything in this code as it is not giving direct answer. anyway i learnt lot after a long run ..
after that i got lot following doubts
1)why we are checking sustain stress with hot allowable not with cold allowable, as sustain stress is concurring in installing condition where temperature is atmospheric only ?
2)why we are taking two times of yeild(+2Sy & -2Sy) stress using to make displacement stress range since after yield point material will be plastic state rit?
3)is occasional stress is primary or secondary ?
hope some can shed a light on my question..i hope you can tell me the answer in more practical way..
if dont mind some basic notes on SIF ,Spring,Bellows,Safety Valve