Question 5.CS.1C: Bicycle Brake Lever Failure Analysis Problem Determine the f...
Bicycle Brake Lever Failure Analysis
Problem Determine the factors of safety at critical points in the brake lever shown in Figures 3-1 (repeated here) and 5-22.
Given The stresses are known from Case Study 1B (p. 206). The material of the brake lever is die-cast aluminum alloy ASTM G8A with S_{ut} = 310 MPa (45 kpsi) and S_{y} = 186 MPa (27 kpsi). The elongation to fracture is 8%, making it a marginally ductile material.
Assumptions The most likely failure points are the two holes where the pins insert and at the root of the cantilever-beam lever handle.
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