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Two designs for a beam are to be considered. Determine which one will support a moment of M= 150 kN.m with the least amount of bending stress. What is that stress? 200 mm- 200 mm- 30 mm 15 mm

Mechanics of Materials (MindTap Course List)

9th Edition

ISBN:9781337093347

Author:Barry J. Goodno, James M. Gere

Publisher:Barry J. Goodno, James M. Gere

Chapter6: Stresses In Beams (advanced Topics)

Section: Chapter Questions

Problem 6.10.14P: Solve the preceding problem for a box beam with dimensions h — 200 mm, A, = 160 mm, b = 150 mm, and...

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Concept explainers

Combined Loading

Any functioning component, such as machine parts, structural members, pressure vessels, and so on, are all under the influence of more than one force. When anybody is under the influence of more than one force such as shear forces, bending moments, axial forces, torsion, and so on, then such body is said to be under combined loading. A very practical example of combined loading is the crankshaft of an internal combustion engine (IC engine). The crankshaft of the IC engine is under high rpm, which is caused due to the torsional forces. Due to the presence of piston, counterbalances, and internal imbalances, the crankshaft experiences lateral forces and due to the rise in temperature, the crankshaft undergoes thermal expansion, which pulls the crankshaft along the axial direction and lateral direction. The presence of unbalanced loads along the periphery of the crankshaft also induces a bending moment.

Question

Two designs for a beam are to be considered. Determine which
one will support a moment of M= 150 kN.m with the least amount of
bending stress. What is that stress?
200 mm-
200 mm-
30 mm
15 mm
300'mm
300 mm
30 mm
15 mm
15 mm
30 mm
(a)
(b)

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