Fatigue crack growth under rotating bending loading on aluminium alloy 7075-T6 and the effect of a steady torsion》.pdf

Theoretical and Applied Fracture Mechanics xxx (2015) xxx–xxx Contents lists available at ScienceDirect Theoretical and Applied Fracture Mechanics journal homepage: www.else /locate/tafmec Fatigue crack growth under rotating bending loading on aluminium alloy 7075-T6 and the effect of a steady torsion M. da Fonte a,b, L. Reis a, M. de Freitas a,⇑ a IDMEC, Instituto Superior Técnico, Universidade de Lisboa, Av. Rovisco Pais, Portugal b Department of Mechanical Engineering, Nautical School, Av. Bonneville Franco, Paço de Arcos, Portugal a r t i c l e i n f o a b s t r a c t Article history: Axles and shafts are of prime importance concerning safety in energy equipment, transportation industry Available online xxxx and general machinery. Case studies relating failure of axles and shafts are widely reported in the liter- ature. Design rules for axles and shafts are mainly based on endurance curves for the material used Keywords: according to long time established standards and procedures. Safe life design, based on endurance curves Multiaxial fatigue is being complemented by damage tolerance, where crack growth is taken into account. Recently, the Mixed-mode fatigue crack growth knowledge of fatigue crack growth under typical loading conditions of axles and shafts with rotating Axles bending and steady torsion has been object of research in order to apply damage tolerance