The following expression is the right statement of linear momentum balance for a deforming body of an arbitrary material

Concept Question Consider the following simple displacement field

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Which of the following expressions represents the rate of work done by the stresses during the deformation of a body of an arbitrary material?

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The following stress-strain curves were obtained for dif- ferent materials subjecting the specimen to the loading path(a, b, c, d ). Which one(s) of them correspond to elas- tic material(s)

Extend definition to material bodies: total work is the addition of the work done on all particles by forces distributed over the volume W by forces distributed over the surface t·udS

Which of the following expressions most ac curately and simply represents the comple mentary strain energy density Uc of a linear elastic material?