a concrete cylinder having a diameter of 6 in and a gauge length of 12 in is tested in compression the results of the test are reported in the table as load vs contraction . Draw the stress strain diagram using scales of 1 in = .5ksi and 1 in = .2(10^-3) in./in. From the diagram determine approximately the modulus of elasticity.
load (kip) Contraction (in)
0 0
5 .0006
9.5 .00012
16.5 . 0020
20.5 .0026
25.5 .0034
30.0 .0040
34.5 .0045
38.5 .0050
46.5 .0062
50.0 .0070
53.0 .0075