Fracture Mechanics MCQ
Test your knowledge with important Fracture Mechanics MCQ and their applications. These MCQs are beneficial for competitive exams too. Explore 30+ more Fracture Mechanics MCQs on Bissoy. Bissoy App
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Which of the following does not play a role in fatigue failure?
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Which of the following is not among the essential requirement to cause fatigue failure?
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The fatigue failure generally starts at the _______________
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Which of the following is not a characteristic of fatigue failure?
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The fatigue failure fracture surface consists of both a smooth region and a rough region.
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The fatigue failure occurs without any gross warning.
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Of the total failure of all the industrial components, the fatigue fracture accounts for how much percentage of fault?
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Which of the following is a sudden failure?
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When equipment fails much before the required stress to the fracture, it is called ______
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According to Irwin’s theory of crack resistance, the failure occurs when the rate of change of __________ release rate is equal to the rate of change of _______________ to the crack growth.
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The R-curve is used to calculate the _______________ to fracture of the material during slow and stable crack propagation.
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For the evaluation of J-integral value from the compact tension specimen, the amount of J in the below-shown sample is equal to __________ Where A = area under the load vs. displacement curve b=W-a B=Specimen thickness
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If the crack length is doubled than the original value, the potential energy of the J integral will change by a factor of ____
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The value of J integral in potential energy term is written as J=dUo/da=K2/E’. The value of E’ in case of plane stress is equal to ______ (where v is the poison’s ratio).
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The J-Integral is interpreted as the potential energy difference between the two identically loaded sample having slightly different crack lengths. Mathematically it can be written as __________
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The J integral is the path-dependent method.
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The J integral method is used for the _______________ materials.
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The geometry of the plastic zone in front of a crack tip is shown in the following figure.
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According to Irwin’s correction of plasticity at the crack tip, the effective crack length is given as the actual crack length plus the radius of the plastic zone. The radius of the plastic zone (rp) in case of plane strain is given as ________
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According to Irwin’s correction of plasticity at the crack tip, the sufficient crack length is given as the actual crack length plus the radius of the plastic zone. The radius of the plastic zone (rp) in case of plane stress is given as ________
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Load vs. notch displacement curve for very brittle elastic material is given by the following curve.
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The fracture toughness of the material is given as 25 MPa m1/2, and the yield strength is equal to 600 MPa. Find the minimum thickness of the material to achieve the condition of plane strain?
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The minimum thickness of the material to achieve the condition of plane strain is given by ______
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The notch in the thick plate is far more damaging than the groove in a thin plate because of the _________
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The KIC is independent of heat treatment, texture, melting practice, impurities, and inclusion, etc.
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The value of KIc ____________ with increase in the temperature and __________ with increase in the strain rate.
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The stress intensity for a plate is given as K=σ√(π
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In the case of plane strain, the relationship between the fracture toughness and crack extension force is given as _______ (where K is the fracture toughness, δ is the crack extension force, ν is the poison’s ratio, and E is the young’s modulus).
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In the case of plane stress, the relationship between the fracture toughness and crack extension force is given as _______ (where K is the fracture toughness, δ is the crack extension force, and E is the young’s modulus).
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The plane-strain value of critical stress intensity factor KIc is independent of the specimen thickness and describes the fracture toughness of the durable material. Here, in the KIc the I represents _____