Stress Concentrations Optimisation Process for Engineering Structures

Abstract

Prediction of fatigue life is a critical issue in the design of aerostructures. Stress concentrations are crucial in this connection. The paper proposes a design optimisation methodology aimed at achieving a longer and safer working record for a structure over its lifecycle, based on the redistribution of material to balance the effect of stress concentrations.The idea of design optimisation in situations where primary failure is driven by stress concentrations is worthwhile and has the potential to offer design engineers a better view in the design structures subjected to fatigue loading and an opportunity for better utilisation of material with its associated economic benefits.