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Mechanical Engineering - Machine Design - Discussion

Discussion Forum : Machine Design - Section 2 (Q.No. 25)
Machine Design
25.
Which of the following statement is correct ?
The toughness of a material increases when it is heated.
The shear stress in a beam varies from zero at the neutral surface and maximum at the outer fibres.
The stress concentration in static loading is more serious in brittle materials and less serious in ductile materials.
The stress concentration in static loading is more serious in ductile materials and less serious in brittle materials.
Answer: Option
Explanation:
No answer description is available. Let's discuss.
Discussion:
2 comments Page 1 of 1.
Davies said:   1 decade ago
I believe the question should be which is incorrect.
Gaurav said:   9 years ago
A. Is wrong as toughness decreases with increase in temp.

B. Is wrong as bending stress is zero at the neutral surface.
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