A beam has a section modulus of 2 x 106 mm3. When subject to a bending moment of 12 kN m, the maximum bending stress is:
A) 1.7 MPa
B) 6 MPa
C) 12 MPa
D) 24 MPa

Question

Quizplus · Accepted Answer

The maximum bending stress is given by the formula:$$\sigma = \frac{M}{S}$$where:* $\sigma$ is the maximum bending stress in MPa* $M$ is the bending moment in kN m* $S$ is the section modulus in mm3Substituting the given values into the formula, we get:$$\sigma = \frac{12 kN m}{2 x 106 mm3} = 1.7 MPa$$Therefore, the maximum bending stress is 1.7 MPa, which corresponds to choice A.

A Beam Has a Section Modulus of 2 X 106