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Question 44941

posted 10 months ago

For the support of Prob. 1.47, knowing that the diameter of the pins d = 16 mm and that the magnitude of the load is P 20 kN,determine (a) the factor of safety for the pin, (b) the required values of b and e if the factor of safety for the wooden member is the same-as that found in part a for the pin.

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Question 43612

posted 11 months ago

5. A specimen of a ceramic material having an elastic modulus of 500 GPa is pulled in tension witha stress of 500 MPa. Will the specimen fail if its "most severe flaw" is an internal crack that hasa length of 0.25 mm and a tip radius of curvature of 0.002 mm? Why or why not?[4 points]

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Question 43617

posted 11 months ago

10. Derive the value for the atomic packing factor of a FCC structure.

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Question 43611

posted 11 months ago

4. Mention at least two differences between – (a) Ductile and Brittle materials, (b) Elastic and Viscous deformation, (c) Thermoplastic and Thermo setting polymers.[4 points]

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Question 43609

posted 11 months ago

2. From the plot of yield strength versus (grain diameter) 2 for a 70 Cu-30 Zn cartridge brass,determine values for the constants oo and ky. Now predict the yield strength of this alloy whenthe average grain diameter is 3.0 × 10-3mm.

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Question 43619

posted 11 months ago

12. Calculate the radius of a Palladium atom if it has a FCC crystal structure, a density of 12.0g/cm3 and an atomic weight of 106.4 g/mol.[3 points]

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Question 43610

posted 11 months ago

3. Explain the phenomenon of (a) Creep and (b) Relaxation in materials. Show stress versus time and strain versus time response for both phenomena. How will you calculate the creep and[6 points]relaxation modulus?

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Question 43618

posted 11 months ago

11. The lattice constant for a BCC Tantalum at 30°C is 0.43026 nm and its density is 26.6 g/cm'.Calculate the value for its relative atomic mass.[3 points]

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Question 43608

posted 11 months ago

1. Define the following terms and explain how they are calculated using equations/figures.
Critically resolved shear stressа.
c. Stress Concentration Factor
h.Bragg's Law
d. Stress Intensity Factor

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Question 43613

posted 11 months ago

6. A structural bridge component in the form of a wide plate is to be fabricated from a steel alloythat has a plane strain fracture toughness of 68.9 MPa vm and a yield strength of 760 MPa. Theflaw size resolution limit of the flaw detection apparatus is 2.0 mm. If the design stress is one-half of the yield strength and the value of Y is 1.0, determine whether or not a critical flaw forthis plate is subject to detection.[4 points]

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