Load - Extension Diagram
The following data was obtained from a tensile test on a specimen of 10mm diameter and gauge length 60mm.
Using the graph paper supplied, plot the load-extension diagram and determine:
(1) The tensile strength
(2) 0.1% Proof Stress
(3) Young’s Modulus for the specimen.
--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
Plot the Load - Extension Diagram
(1) Find the Tensile Strength
(2) Find 0.1% Proof Stress
At 0.06mm, draw a line parallel to the straight line portion of the graph.
0.1% proof stress
0.1% of 60mm = 0.06mm
Proof load = 77kN
0.1% proof stress = Proof Load / CSA = 77 / 78.55 = .98KN/mm2
(3) Find Young's Modulus