8/18/2019 Tutorial 02 - Thermal Stress

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Tutorial 2: Thermal Stress

1. Figure 1 shows that the steel bolt (black) is just tight against the brass bush (grey)

with negligible force at temperature 30°C. he inner an! outer !iameter of the brass

 bush is "0mm an! 30mm respecti#ely. $etermine the stresses in!uce! in both the bolt an! the bush if the temperature increases to %&°C. 'i#en E brass  100'a* αbrass 

"1+°C,1* E  steel   "10'a* α steel   11+°C,1

-s  30./ a*  b  ,30./ a2

Figure 1

". railway is lai! so that there is no stress in the rails at "0 °C. Calculate the stress in

the rail at ,4 °C if all contraction is pre#ente!. ake E   "04 '56m"* an! α   1"710,4

 per °C. 8f* howe#er* there is a 4imm allowance for contraction per rail* what is the

stress at ,4 °C9 he rails are "% m long.

-4/.3 56m"* 1.& 56m"2