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Erschienen in:
2006 | OriginalPaper | Buchkapitel
Energy Relations and the Energy-Momentum Tensor in Continuum Mechanics
Erschienen in: Collected Works of J. D. Eshelby
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The force on a dislocation or point defect, as understood in solid-state physics, and the crack extension force of fracture mechanics are examples of quantities which measure the rate at which the total energy of a physical system varies as some kind of departure frm uniformity within it changes its configuration. One may define similarly a force acting on each element of a mobile interface (a phase boundary or martensitic interface, for example).Methods for calculating sech effective forces are reviewed for both quasi-static and dynamic processes, the latter with particular reference to the motion of crack tips. The elastic energy-momentum tensor proves to be a useful tool in such calculations.