Chapter 4, Problem 4.3QP

An aluminum alloy specimen with a radius of 0.28 in. was subjected to tension until fracture and produced results shown in Table P4.3.

a. Using a spreadsheet program, plot the stress–strain relationship.

b. Calculate the modulus of elasticity of the aluminum alloy.

TABLE P4.3

Stress, ksi	Strain, 10−3 in./in.
0	0.0
8	0.6
17	1.5
27	2.4
35	3.2
43	4.0
50	4.6
58	5.2
62	5.8
64	6.2
65	6.5
67	7.3
68	8.1
	9.7

c. Determine the proportional limit.

d. What is the maximum load if the stress in the bar is not to exceed the proportional limit?

e. Determine the 0.2% offset yield strength.

f. Determine the tensile strength.

g. Determine the percent of elongation at failure.