According to the Euler–Bernoulli bending theory, which of the following
is NOT a valid assumption for a straight beam undergoing small, elastic
deformation?

Question

Accepted Answer

In-plane
distortion of the cross-section is significant and cannot be neglected.

Answer

Plane
cross-sections remain plane after bending.

Answer

The
length of the longitudinal (neutral) axis remains unchanged.

Answer

Cross-sections
remain perpendicular to the longitudinal axis after bending.

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According to the Euler–Bernoulli bending theory, which of the following is NOT ...

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