Past Year Questions: Fatigue Strength And S-N Diagram Notes | EduRev

Machine Design

Mechanical Engineering : Past Year Questions: Fatigue Strength And S-N Diagram Notes | EduRev

The document Past Year Questions: Fatigue Strength And S-N Diagram Notes | EduRev is a part of the Mechanical Engineering Course Machine Design.
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Question 1:Endurance limit of a beam subjected to pure bending decreases with

[2019 , Set 2]

Question 2:A cylindrical shaft is subjected to an alternating stress of 100 MPa. Fatigue strength to sustain 1000 cycles is 490 MPa. If the corrected endurance strength is 70 MPa, estimated shaft life will be

[2006]

Question 3:The S-N curve for steel becomes asymptotic nearly at

[2004]

Question 4:In terms of theoretical stress concentration factor kt and fatigue stress concentration factor kt, the notch sensitivity q is expressed as

[2004]

Question 5:Which one of the following is the most conservation fatigue failure criterion?

[2015, Set-1]

Question 6:A static load is mounted at the centre of a shaft rotating at uniform angular velocity. This shaft will be designed for

[2002]

Question 7:The yield strength of a steel shaft is twice its endurance limit. Which of the following torque fluctuations represent the most critical situation according to Soderberg criterion?

[1993]

Question 8:The process of shot peening increases the fatigue life of steel springs mainly because it results in

[1990]

Question 9:Stress concentration in a machine component of a ductile material is not so harmful as it is in a brittle material because

[1989]

Question 10:A ductile material having an endurance limit of 196 N/mm2 and the yield point at 294 N/mm2 is stressed under variable load. The maximum and minimum stresses are 147 N/mm2 and 49 N/mm2. The fatigue stress concentration factor is 1.32. The available factor of safety for this loading is

[1987]


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