The elastic behaviour of material for linear stress and linear strain, is shown in the figure. The energy density for a linear strain of 5 x 10 -4 is .............kJ/m 3 . Assume that material is elastic upto the linear strain of 5 x 10 -4 .
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CHECK THE SOLUTION.
(25)
Energy density = 
stress x strain
= 
(strain) 2 y = 
(5x10 -4 ) 2 x20x10 10
= 25x10 2 x 10=25 
Ans. 25
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