Question

6. The data in the table below was obtained from room temperature tensile tests of two Mg alloy samples (A and B): Determine: elastic modulus, yield strength, UTS, and total elongation of these samples. Calculate the strain hardening exponent (n). Sa 35 120 158 333 203.333 228 333 245 0.33 0.63 0.83 0.28 0.4 0.61 0.85 1.75 3.75 5.16 7.64 0.78 11.25 11.9 1225 12.25 12.25 1225 123 203.333 235 260 83.333 295 305 311.66 18.333 321.667 325 1.9 263.333 273 333 283. 333 288.333 287.667 78.33 270 240 220 140 4.19 5.71 6.88 10.25 13.99 15.79 183 18.35 330 330 315.66 170 7. The state of plane stress at a point is shown on the element below. Construct the Mohr's circle and determine the principal and maximum in-plane shear stresses. 90 MPa 60 MPa 20 MPa 8. For a metal, the plastic deformation starts at stress of - 280 MPa, and the elastic modulus 115 GPa Calculate the maximum load that can be applied to a sample with a cross-sectional area of 325 mm2without plastic deformation? If the initial length of the sample is 120 mm, what is the maximum length to which it may be elongated without showing a plastic deformation? Deadline: Wednesday 17th April 2019 (12:00)

Answer 1

6oNIa ar て ", 60 MPa Contu (35,0) da 30 , 60 Aて てMax 0,6 0 2 uen 116.4 MPa