Boundary Value Problems

  • Marcus Olavi RüterEmail author
Part of the Lecture Notes in Applied and Computational Mechanics book series (LNACM, volume 88)


In this chapter, the field equations derived in the previous chapter are summarized and supplemented by boundary conditions. This results in the boundary value problems of compressible and (nearly) incompressible finite hyperelasticity within both Newtonian and Eshelbian mechanics. The derivations are performed in terms of their strong and weak forms and supplemented by appropriate linearizations that are used within the iterative Newton-Raphson scheme. In the special case of the first iteration, this yields the linearized elasticity problem. It will also be demonstrated how further simplifications result in the Poisson (membrane) and uniaxial problems. Attention is focused in this chapter on the derivations of the variational forms of the boundary value problems. These forms are also known as the weak forms because the strong forms only need to be satisfied in an integral rather than in a pointwise sense. Moreover, integration by parts reduces the differentiability requirements for the functions involved in the weak forms. These are the key ingredients needed to develop numerical methods of the Galerkin type, as will be presented in the subsequent chapter.


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Authors and Affiliations

  1. 1.Department of Civil and Environmental EngineeringUniversity of CaliforniaLos AngelesUSA

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