Mechanical Engineering The fatigue strength limit Sn (n = 106) of a steel part is 112 MPa and its ultimate tensile strength (Su) is 385MPa. Adopting Ct = 1, and S103 = 0.9 * Su Ct determino: (Uso two decimal places in the

Elements Of Electromagnetics
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Mechanical Engineering
The fatigue strength limit Sn (n = 106) of a steel
part is 112 MPa and its ultimate tensile strength
(Sy) is 385MPa. Adopting Ct = 1, and S103 = 0.9 *
Su* Ct, determine: (Use two decimal places in the
answers), (* is multiplication signal):
a) The fatigue strength (in MPa) corresponding
to a life of 40000 cycles.
b) The average life in cycles that this part would
last if subjected to an alternating stress of 170
MPa due to bending.
Transcribed Image Text:Mechanical Engineering The fatigue strength limit Sn (n = 106) of a steel part is 112 MPa and its ultimate tensile strength (Sy) is 385MPa. Adopting Ct = 1, and S103 = 0.9 * Su* Ct, determine: (Use two decimal places in the answers), (* is multiplication signal): a) The fatigue strength (in MPa) corresponding to a life of 40000 cycles. b) The average life in cycles that this part would last if subjected to an alternating stress of 170 MPa due to bending.
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