Strain Energy and Related Principles
Before proceeding to the solution of specific elasticity problems, we wish to explore the associated concepts of work and energy. Boundary tractions and body forces will do work on an elastic solid, and this work will be stored inside the material in the form of strain energy. For the elastic case, removal of these loadings results in complete recovery of the stored energy within the body. Development of strain energy concepts can yield new and useful information not found by other methods. This study also leads to some new energy methods or principles that provide additional techniques to solve elasticity problems. In some sense these methods may be thought of as replacements of particular field equations ...
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