GATE ME 2019 Set 1 — Question 32
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Machine Design → Static & Dynamic Loading → Fatigue, S-N Diagram & Endurance
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Question
During a high cycle fatigue test, a metallic specimen is subjected to cyclic loading with a mean stress of MPa, and a minimum stress of MPa. The -ratio (minimum stress to maximum stress) for this cyclic loading is ______ (round off to one decimal place)
Correct answer
-0.2
Solution
Given:
Mean stress, MPa
Minimum stress, MPaWe know that mean stress is given by:The -ratio is defined as the ratio of minimum stress to maximum stress:
Mean stress, MPa
Minimum stress, MPaWe know that mean stress is given by:The -ratio is defined as the ratio of minimum stress to maximum stress:
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