[Daily Question] Theoretical Basis 2020.03.20

2020-03-20View Original

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Multiple choice questions: The figure shows a straight rod of equal cross-section. The compressive stiffness of the material is EA. The axial displacement of the cross-section at 1.5L from end A in the middle of the rod is (). Answer: D Tip: Those who can explain the problem-solving process will be given extra rewards, and the answers will be visible in the replies!

Reply #22020-03-20

D The displacement of this section is related to the axial force of segments AB and BC. The axial force of segment AB is: F ； The axial force of segment BC is: 0. Therefore, according to Hooke's law, the elongation at a distance of 1.5L from A is the displacement there.: FL/(EA).

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[Daily Question] Theoretical Basis 2020.03.20

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