Beam theory: meaning of point of contraflexure (inflection point) On a bending moment diagram for a beam, identify what occurs at the point of contraflexure.
Mechanical Engineering
Strength of Materials
Difficulty: Easy
Choose an option
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AShear force changes sign
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BBending moment changes sign (passes through zero)
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CShear force is maximum
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DBending moment is maximum
Answer
Correct Answer: Bending moment changes sign (passes through zero)
Explanation
ConceptThe point of contraflexure (inflection) is where the curvature changes sign; equivalently, the bending moment diagram crosses zero.
Final AnswerBending moment changes sign (passes through zero).