题目内容
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提问人：网友loulxr
发布时间：2022-01-06
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a beam with an overhang is loaded by a uniform load of 3 kn/m over its entire length. moment of inertia
A beam with an overhang is loaded by a uniform load of 3 kN/m over its entire length. Moment of inertia
and distances to top and bottom of the beam cross section are 20 mm and 66.4 mm, respectively. It is known that reactions at A and B are 4.5 kN and 13.5 kN, respectively. The maximum bending stress in the beam is approximately:
A、36 MPa
B、67 MPa
C、102 MPa
D、119 MPa
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(figure part a) of the beam, considering the effect of the beam's own weight. (b) Repeat part (a) if the beam is hollow with wall thickness
(figure part b); compare the cross-sectional areas of the two designs.
