The effect of the stress riser is much more pronounced in a brittle material than a ductile material. Which of the following is not the correct explanation for this behavior?

Strain hardening occurs in ductile material, which increases the required stress for the flow of crack

Strain hardening does not occur in a brittle material, so it results in sudden propagation of the crack

Redistribution of stress does not occur in a brittle material

The toughness of brittle material is much more than ductile material

Explore topic-wise MCQs in Mechanical Metallurgy.

This section includes 5 Mcqs, each offering curated multiple-choice questions to sharpen your Mechanical Metallurgy knowledge and support exam preparation. Choose a topic below to get started.

1.	The effect of the stress riser is much more pronounced in a brittle material than a ductile material. Which of the following is not the correct explanation for this behavior?
A.	Strain hardening occurs in ductile material, which increases the required stress for the flow of crack
B.	Strain hardening does not occur in a brittle material, so it results in sudden propagation of the crack
C.	Redistribution of stress does not occur in a brittle material
D.	The toughness of brittle material is much more than ductile material
Answer» E.

Discussion

2.	The value of stress concentration for circular hole in a plate subjected to uniform stress of is equal to ________
A.	1
B.	4
C.	3
D.	10
Answer» D. 10

Discussion

3.	In addition to producing the stress concentration, a notch also creates a localized condition of the biaxial or triaxial stress.
A.	True
B.	False
Answer» B. False

Discussion

4.	The stress concentration is generally expressed by a theoretical stress-concentration factor k_t. Generally, K_t is described as the ratio of _________________
A.	<sub>max</sub> / <sub>min</sub>
B.	<sub>min</sub>/ <sub>max</sub>
C.	<sub>max</sub>/ <sub>nominal</sub>
D.	<sub>nominal</sub>/ <sub>max</sub>
Answer» D. <sub>nominal</sub>/ <sub>max</sub>

Discussion

5.	A geometrical discontinuity in a body, such as a hole or a notch result in nonuniform distribution of stress at the vicinity of discontinuity. At the region near the discontinuity, the local stress will be higher than normal stress distribution.
A.	True
B.	False
Answer» B. False

Discussion

Explore topic-wise MCQs in Mechanical Metallurgy.

The effect of the stress riser is much more pronounced in a brittle material than a ductile material. Which of the following is not the correct explanation for this behavior?

The value of stress concentration for circular hole in a plate subjected to uniform stress of is equal to ________

In addition to producing the stress concentration, a notch also creates a localized condition of the biaxial or triaxial stress.

The stress concentration is generally expressed by a theoretical stress-concentration factor kt. Generally, Kt is described as the ratio of _________________

A geometrical discontinuity in a body, such as a hole or a notch result in nonuniform distribution of stress at the vicinity of discontinuity. At the region near the discontinuity, the local stress will be higher than normal stress distribution.

The stress concentration is generally expressed by a theoretical stress-concentration factor k_t. Generally, K_t is described as the ratio of _________________