阿摩線上測驗
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阿摩線上測驗
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4. The symmetric two-rod truss of Fig. 4 is subjected to a force P to the right at Point C. Each of the two identical rods has a cross sectional area of 100 cm², a moment of inertia of 50 cm⁴ for its section, and is made of elastic-perfectly plastic steel with a modulus of elasticity of 200 GPa and a yielding stress of 200 MPa. The length of Rods BC and DC are both 5 meters. (25%)
2) What is the maximum value of P? Why can't it be larger?