Question
Flexural stress occurs in a straight beam when
The correct answer is
it is subjected to transverse loads
Beam Flexural Stress Cause
Flexural stress, also known as bending stress, occurs in a beam when it experiences bending.
Understanding Bending Moments
- Bending is caused by a bending moment acting on the beam's cross-section.
- A bending moment is generated when loads are applied in a way that forces the beam to curve.
Role of Transverse Loads
- Transverse loads are forces acting perpendicular to the longitudinal axis of the beam.
- These loads directly create the bending moments necessary to induce flexural stress.
- For example, a weight placed on top of a simple horizontal beam is a transverse load.
Other Load Types
- Torsional loads cause twisting and induce shear stress, not primarily flexural stress.
- Axial loads (tension or compression along the axis) cause uniform normal stress (tensile or compressive), not flexural stress.
Therefore, flexural stress specifically occurs when a straight beam is subjected to transverse loads.
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