# L23 - Exam III Tuesday (May 4) 2:00-3:50pm Covers Chapters...

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Unformatted text preview: Exam III Tuesday (May 4) 2:00-3:50pm Covers Chapters 7-9 (L16-L21) Location: SAGE 3303 1 page crib sheet- double sided (no worked- out problems) 4 problems With increasing load: The elementary work done by the load P as the rod elongates by a small dx is work elementary dx P dU = = Strain Energy = the area of width dx under the load- deformation diagram. The total work done by the load for a deformation x 1 , increase of strain energy in the rod. energy strain work total dx P U x = = = 1 1 1 2 1 2 1 2 1 1 x P kx dx kx U x = = = In the case of a linear elastic deformation, Strain Energy Strain Energy Density To eliminate the effects of size, evaluate the strain- energy per unit volume, density energy strain d u L dx A P V U x x = = = 1 1 As the material is unloaded the stress returns to zero a permanent deformation. part strain energy is recovered Remainder of the energy spent in deforming the material is dissipated as heat....
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## This note was uploaded on 12/14/2010 for the course ENGR 2530 taught by Professor Lindaschadlerfeist during the Fall '08 term at Rensselaer Polytechnic Institute.

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L23 - Exam III Tuesday (May 4) 2:00-3:50pm Covers Chapters...

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