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Q.

The elastic behavior of material for linear stress and linear strain, is shown in the figure. The energy density for a linear strain of 5×10−4 is____________  kJ/m3.Assume that material is elastic upto the linear strain of 5×10−4.

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answer is 25.

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Detailed Solution

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y=stressstrain=2.0×1010

Energy density =12stress×strain

=12strain2y=125×10−42×20×1010=25×102×10=25kJm3

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