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217_Mechanics SolutionInstructors_Sol.Manual-Mechanics_Materials_7e.book_Gere_light.1

217_Mechanics SolutionInstructors_Sol.Manual-Mechanics_Materials_7e.book_Gere_light.1

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SECTION 2.7 Strain Energy 211 (c) C OMPARISON OF STRAIN ENERGY U WITH THE QUANTITY P C /2 U 6.55 J The two quantities are not the same. The work done by the load P is not equal to P C /2 because the load- displacement relation (see below) is non-linear when the displacements are large. (The work done by the load P
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