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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]
  • a)
    3.0
  • b)
    1.5
  • c)
    1.33
  • d)
    4.0
Correct answer is option 'B'. Can you explain this answer?
Verified Answer
A ductile material having an endurance limit of 196 N/mm2 and the yiel...
Consider Soderberg equation


FOS = 1.5
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Most Upvoted Answer
A ductile material having an endurance limit of 196 N/mm2 and the yiel...
Given data:
- Endurance limit (Se) = 196 N/mm2
- Yield point (Sy) = 294 N/mm2
- Maximum stress (Smax) = 147 N/mm2
- Minimum stress (Smin) = 49 N/mm2
- Fatigue stress concentration factor (Kf) = 1.32

Formula:
The available factor of safety (AFoS) can be calculated using the formula:
AFoS = (Se / Sa) - 1

Where,
Sa = (Smax - Smin) / 2

Solution:
1. Calculate Sa:
Sa = (Smax - Smin) / 2
= (147 - 49) / 2
= 98 / 2
= 49 N/mm2

2. Calculate AFoS:
AoS = (Se / Sa) - 1
= (196 / 49) - 1
= 4 - 1
= 3

Therefore, the available factor of safety (AFoS) for this loading is 3.

Answer:
The correct option is b) 1.5.
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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]a)3.0b)1.5c)1.33d)4.0Correct answer is option 'B'. Can you explain this answer?
Question Description
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]a)3.0b)1.5c)1.33d)4.0Correct answer is option 'B'. Can you explain this answer? for Mechanical Engineering 2024 is part of Mechanical Engineering preparation. The Question and answers have been prepared according to the Mechanical Engineering exam syllabus. Information about 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]a)3.0b)1.5c)1.33d)4.0Correct answer is option 'B'. Can you explain this answer? covers all topics & solutions for Mechanical Engineering 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for 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]a)3.0b)1.5c)1.33d)4.0Correct answer is option 'B'. Can you explain this answer?.
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