6. Which of the following terms best describe the elastic response of a materials to the application of load A. Fatigue B. Yielding C. Deflection, D. Fracture

Problem: A tensile test specimen of stainless steel alloy having a with a diameter of 12.6 mm and a 50 mm gage length was tested to fracture. Load and deformation data obtained during the test are given: Determine: (a) the modulus of elasticity. (b) the proportional limit. Load (kN) 0.00 Change in length (mm) (c) the ultimate strength. 0.00 (d) the yield strength (0.20% offset). 0.00 25.79 0.00 (e) the fracture stress. 0.05 51.59 0.10 (f) the true fracture stress if the final diameter 66.55 73.36 80.18 87.77 0.20 of the specimen at the location of the fracture 0.30 0.45 was 8.89 mm 0.63 95.35 0.81 101.42 105.98 112.05 1.01 1,18 1.41 only solve d, e,f 118.13 123.46 128.03 131.85 133.39 134.95 135.73 1.66 1.94 2.27 2.60 2,82 3.15 3.35 3.68 136.53 136.56 3.93 135.84 4.26 135.14 4,66 133.66 4.94 130.67 5.22 5.47 128.44 124.69 5.70 120.92 5.82 117.91 5.95 fracture 116.52

Explain the following  1)creep 2)fatigue 3)other similar material failure if you know any Proper concepts are required not only definitons

QUESTION 7 Which governing equations are required to solve a plane elasticity problem? Boundary conditions Equilibrium condition and boundary conditions Equilibrium conditions, boundary conditions, and the compatibility equation QUESTION 8 Which of the following conditions must a structure meet to produce a state of plane strain parallel to the x-y plane? Thin-walled Uniform in z-direction Dimension in z-direction that is much smaller than x and y QUESTION 9 What is the major advantage of using the Airy stress function for plane isotropic solids? Reduces the governing equations to only the boundary conditions and compatibility equation Reduces governing equations to a single function with a single unknown QUESTION 10 Airy stress functions are applicable for solving all elasticity problems. True False