题目内容

When the axial pressure P reaches the critical pressure Pcr, a slender compression rod is unstable after slight interference and is in micro bending equilibrium state. At this time, if the pressure P is relieved, the compression rod will be micro bending deformed

A. Completely disappear
B. remain unchanged
Continue to increase

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Length factor in the following figure μ=

A. μ<0.7
B. 0.7<μ<1.0
C. 1.0<μ<2
D. μ>2

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The slender rod bears the axial pressure P, and the critical pressure Pcrit of the rod is independent of

A. Material of rod
B. the length of rod
C. Pressure on rod
D. Shape of rod

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When the materials are the same, with the increase of working flexibility,

A. The critical pressure of slender rod decreases, and the critical pressure of medium thick rod remains unchanged
B. The critical pressure of slender rod remains unchanged, and the critical pressure of medium thick rod decreases
C. The critical pressure of slender rod decreases, and that of medium thick rod decreases
D. The critical pressure of slender rod remains unchanged, and that of medium thick rod remains unchanged

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The main reason for the instability of compression bar is the influence of external interference force

A. 对
B. 错

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When the axial pressure P reaches the critical pressure Pcr, a slender compression rod is unstable after slight interference and is in micro bending equilibrium state. At this time, if the pressure P is relieved, the compression rod will be micro bending deformed

A. Completely disappear B. remain unchanged Continue to increase

Length factor in the following figure μ=

The slender rod bears the axial pressure P, and the critical pressure Pcrit of the rod is independent of

When the materials are the same, with the increase of working flexibility,

The main reason for the instability of compression bar is the influence of external interference force

A. Completely disappear
B. remain unchanged
Continue to increase