Fatigue is the initiation and propagation of cracks in a material due to cyclic loading. Once a fatigue crack has initiated, it grows with each loading cycle, typically producing striations. The crack will continue to grow until it reaches a critical size, which occurs when the stress intensity factor of the crack exceeds the fracture toughness of the material, producing rapid propagation and typically complete fracture of the structural member.
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For the simply supported beam of Figure 1, determine the uniformly distributed load, q, at which...
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