FRACTURE MECHANICS WHAT IS FRACTURE MECHANICS Fracture mechanics is mechanics of solids containing planes of displacement discontinuities (cracks) with special attention to their growth Fracture mechanics is a failure theory that 1. determines material failure by energy criteria, possibly in conjunction with strength (or yield) criteria 2. considers failure to be propagating throughout the structure rather than simultaneous throughout the entire failure zone or surface. Linear elastic fracture mechanics (LEFM) is the basic theory of fracture, that deals with sharp cracks in elastic bodies. It is applicable to any materials as long as the material is elastic except in a vanishingly small region at the crack tip (assumption of small scale yielding), brittle or quasibrittle fracture, stable or unstable crack growth Elastic-plastic fracture mechanics is the theory of ductile fracture, usually characterized by stable crack growth (ductile metals) the fracture process is accompanied by formation of large plastic zone at the crack tip
FRACTURE MECHANICS
May 22, 2023
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