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categoryهندسة ميكانيكية schoolبكالوريوس event_available2026-07-15

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ASSESSSMENT TORSION STRESS PROBLEM 1 The figure below shows a Fracture of a skier's tibia can be caused by catching of the tip of the ski, thus creating a torque. If the skier's bindings are improperly set, they will not release appropriately, and the torque will be transmitted to the tibia at the top of the ski boot. When this happens, the tibia can break in a typical spiral fracture pattern. How much force would it take at the end of the ski to create such a fracture in a bone, as illustrated in the figure? Assume a pure torque is applied to the tibia from the force on the ski, the cross-sectional geometry of the tibia is a hollow cylinder with dimensions as shown in the figure, and the tibia fractures at a shear stress of 15,000 psi. (10pts) Tibia midshaft -36 inches- r, tibia 0.52 inches r, tibia 0.27 inches F

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