Exam Details
| Subject | fracture, fatigue and creep deformation | |
| Paper | ||
| Exam / Course | computer science and engineering | |
| Department | ||
| Organization | Vardhaman College Of Engineering | |
| Position | ||
| Exam Date | January, 2018 | |
| City, State | telangana, hyderabad |
Question Paper
Hall Ticket No:
Question Paper Code B3705
(AUTONOMOUS) M. Tech I Semester Regular Examinations, January 2018
(Regulations: VCE-R15) FRACTURE, FATIGUE AND CREEP DEFORMATION
(Engineering Design) Date: 06 January, 2018 FN
Time: 3 hours
Max Marks: 70
Answer any FIVE Questions
Each Question carries equal marks
1.
Explain briefly the ductile/brittle fracture transition temperature for notched and unnotched components.
7M
Differentiate clearly between intergranular and transgranular fracture.
7M
2.
Explain Griffith theory of fracture for ideal brittle materials.
7M
A relatively large plate of a glass is subjected to a tensile stress of 40MPa. If the specific surface energy and modulus of elasticity are 0.3J/m2 and 69GPa, respectively, determine the maximum length of a surface crack that will result in a fracture.
7M
3.
Define energy release rate. Derive an expression for energy release rate of cracked plate at fixed deflection.
7M
Explain the differences between the plane stress fracture toughness and the plane strain fracture toughness. For a ductile metal, which fracture toughness has a higher value and why?
7M
4.
Differentiate between: i. Stress Intensity Factor ii. Plane stress fracture toughness
7M
Derive plastic zone size as per Dugdale approach.
7M
5.
Discuss about the J-integral approach in CTOD of elastic and plastic fracture.
7M
Path independence of J integral is not valid for elastic plastic materials. Why?
7M
6.
What do you mean by plane strain fracture toughness? Explain the factors considered for improving fracture toughness.
7M
Explain the effect of thickness on fracture toughness and also give examples as to how this value would be useful in industry scenario.
7M
7.
Explain the different stages of fatigue crack growth.
7M
How are constant fatigue life diagrams drawn? Using constant life diagrams superimposed with yield criterion, explain the effect of tensile and compressive mean stress.
7M
8.
Explain the Effect of stress and temperature on the creep curve.
7M
Explain Larson-Miller parameter.
7M
Question Paper Code B3705
(AUTONOMOUS) M. Tech I Semester Regular Examinations, January 2018
(Regulations: VCE-R15) FRACTURE, FATIGUE AND CREEP DEFORMATION
(Engineering Design) Date: 06 January, 2018 FN
Time: 3 hours
Max Marks: 70
Answer any FIVE Questions
Each Question carries equal marks
1.
Explain briefly the ductile/brittle fracture transition temperature for notched and unnotched components.
7M
Differentiate clearly between intergranular and transgranular fracture.
7M
2.
Explain Griffith theory of fracture for ideal brittle materials.
7M
A relatively large plate of a glass is subjected to a tensile stress of 40MPa. If the specific surface energy and modulus of elasticity are 0.3J/m2 and 69GPa, respectively, determine the maximum length of a surface crack that will result in a fracture.
7M
3.
Define energy release rate. Derive an expression for energy release rate of cracked plate at fixed deflection.
7M
Explain the differences between the plane stress fracture toughness and the plane strain fracture toughness. For a ductile metal, which fracture toughness has a higher value and why?
7M
4.
Differentiate between: i. Stress Intensity Factor ii. Plane stress fracture toughness
7M
Derive plastic zone size as per Dugdale approach.
7M
5.
Discuss about the J-integral approach in CTOD of elastic and plastic fracture.
7M
Path independence of J integral is not valid for elastic plastic materials. Why?
7M
6.
What do you mean by plane strain fracture toughness? Explain the factors considered for improving fracture toughness.
7M
Explain the effect of thickness on fracture toughness and also give examples as to how this value would be useful in industry scenario.
7M
7.
Explain the different stages of fatigue crack growth.
7M
How are constant fatigue life diagrams drawn? Using constant life diagrams superimposed with yield criterion, explain the effect of tensile and compressive mean stress.
7M
8.
Explain the Effect of stress and temperature on the creep curve.
7M
Explain Larson-Miller parameter.
7M
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