A note on notch shape optimization to minimize stress concentration effects

摘要: Abstract Notches induce localized stress concentration effects that can affect many failure mechanisms, in particular the initiation and growth of short cracks under fatigue loads, significantly reducing strength structural components service loads. To decrease such nocive effects, notches are usually designed with as large possible circular arc tips, even though it has long been recognized this is not best solution to minimize problems. Indeed, properly shaped variable tip radii have a much smaller deleterious influence on strength, but optimized still routinely used design. In fact, standard specimens specify them. Nevertheless, improved be very good design option augment components, since they barely their global dimensions or weight. Moreover, nowadays economically built due widespread availability CNC machine tools. After comparing improvements achievable by some classic receipts, two simple robust numerical routines developed optimize notch shapes for work general multiaxial loading conditions presented evaluated.