The biological algorithm for solving shape optimization problems with fracture strength and fatigue life constrains

This paper presents a general methodology for shape optimization that can be applied to problems with either static strength or fatigue life as optimization objective functions and/or constraints. Research has shown that a structure optimized for the minimum boundary stress does not necessarily give the longest fatigue life. In addition, as the boundary shape is changes, the critical crack locations also change. This makes it necessary to simultaneously consider flaws at a range of locations in the structure.