Machine Elements Design-Lecture,Section-1-Spring 2025
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The Maximum Distortion Energy Theory (Von Mises) is based on:
Which of the following failure theories is most suitable for ductile materials?
According to Rankine’s theory (Maximum Normal Stress Theory), failure occurs when:
Which of the following statements is true regarding the comparison of failure theories for ductile materials?
Tresca’s Yield Criterion states that yielding begins when:
A helical gear has a normal module of 4 mm, a normal pressure angle of 20°, a helix angle of 25°, and 18 teeth. Calculate (round to 2 decimals):
a) The transverse pitch (mm):
.
b) The addendum diameter (mm):
.
In a tensile test, failure in ductile materials occurs at planes that are approximately
An electric motor transmits 745 W at 1800 rpm to a helical pinion with 18 teeth, a transverse module of 4 mm, a normal pressure angle of 20°, and a helix angle of 30°. Calculate (round to 2 decimals):
a) The normal module (mm):
.
b) The tangential force (N):
.
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