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.

 

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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