Question: b. The data shown in the table below were obtained from a tension test on an aluminium alloy specimen. 3.45 Stress(x 10 Pa) 0.86 Strain

b. The data shown in the table below were

b. The data shown in the table below were obtained from a tension test on an aluminium alloy specimen. 3.45 Stress(x 10 Pa) 0.86 Strain (x 105 1.0 1.58241 2.0 3.2 4.20 3.7 4.48 6.5 4.53 7.0 4.69 8.4 4.6 Plot the data, and then determine the: (8 marks) modulus of elasticity E (state the unit of E) (4 marks) stress at the proportional limit (2 marks) The allowable stress for an aluminium specimen is stated as 270 MPa. Determine the allowable load if the cross-sectional area is 5.0 em and the factor of safety is 3. (5 marks) (Total 25 marks)

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