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Design and Mechanics of Mountaineering Equipment
Published in Franz Konstantin Fuss, Aleksandar Subic, Martin Strangwood, Rabindra Mehta, Routledge Handbook of Sports Technology and Engineering, 2013
Franz Konstantin Fuss, Günther Niegl
Cam lobes are usually computer numerical control-machined from 7075 aluminium alloy (Foster 2002), which is both lightweight (2,810 kg/m3; www.matweb.com) and strong (7075-T6 UTS and yield strength: 572 MPa and 503 MPa, respectively; www.matweb.com). To reduce the mass, cam lobes are manufactured with holes and partial-depth cut-outs. Stresses were investigated by Custer (n.d.), using Hertzian contact stress analysis, and by Bradshaw (2003) applying finite element modelling. Bradshaw (2003) suggested minimising the amount of material at low stress areas in order to optimise cam design.
Material removal mechanism of aluminium alloy in barrel finishing under grinding fluid
Published in Materials and Manufacturing Processes, 2021
Huiting Shi, Shengqiang Yang, Xiuhong Li, Wenhui Li, Huixin Zhang
As a typical ultra-high-strength wrought aluminum alloy, 7075 aluminum alloy is widely used in various fields like aerospace, automobile, and marine equipment, but it is sensitive to damage and easy to cause surface damage.[7] The structure and material properties of alloy are affected by crack propagation, creep strain and environmental damage.[8] Nowadays, by introducing a high plastic deformation, the gradient nanostructure layer is formed to strengthen the surface of the material. However, surface damage or subsurface damage will occur due to the micro-cracks and fracture surfaces easily form on nanocrystals.[9] In order to obtain the higher stability of microstructure, the fine surface finishing about finishing efficiency and surface integrity is main consideration.[10]