EBK MECHANICS OF MATERIALS
7th Edition
ISBN: 8220102804487
Author: BEER
Publisher: YUZU
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Chapter 1.2, Problem 21P
A 40-kN axial load is applied to a short wooden post that is supported by a concrete footing resting on undisturbed soil. Determine (a) the maximum bearing stress on the concrete footing, (b) the size of the footing for which the average bearing stress in the soil is 145 kPa.
Fig. P1.21
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5. The load P applied to a steel rod is distributed to a timber support by an annular washer. The
diameter of the rod is 22 mm and the inner diameter of the washer is 25 mm, which is slightly
larger than the diameter of the hole. Determine the smallest allowable outer diameter d of the
washer, knowing that the axial normal stress in the steel rod is 35 MPa and the average bearing
stress between the washer and the timber must not exceed 5 MPa.
- 22 mm
а)
An annular washer distributes the load P applied to a steel rod to a timber support.
The rod's diameter is 22 mm, and the washer's inner diameter is 25 mm, which is
larger than the hole's permissible outer diameter. Knowing that the axial normal stress
in the steel rod is 35 MPa and the average bearing stress between the washer and the
timber must not exceed 5 MPa, examine the smallest allowed outer diameter, d, of the
washer.
- 22 mm
Figure 4
A rectangular concrete slab, 3 m x 4.5 m, rests on the surface of a soil mass. The load on the slab is 2025 kN. Determine the vertical stress increase in kPa at a depth of 3 m under the midpoint of the 4.5 m right edge.
a.13.5
b.47.4
c.63
d.102.4
Chapter 1 Solutions
EBK MECHANICS OF MATERIALS
Ch. 1.2 - Two solid cylindrical rods AB and BC are welded...Ch. 1.2 - Two solid cylindrical rods AB and BC are welded...Ch. 1.2 - Two solid cylindrical rods AB and BC are welded...Ch. 1.2 - Two solid cylindrical rods AB and BC are welded...Ch. 1.2 - A strain gage located at C on the surface of bone...Ch. 1.2 - Two brass rods AB and BC, each of uniform...Ch. 1.2 - Each of the four vertical links has an 8 36-mm...Ch. 1.2 - Link AC has a uniform rectangular cross section 18...Ch. 1.2 - Three forces, each of magnitude P = 4 kN, are...Ch. 1.2 - Link BD consists of a single bar 1 in. wide and 12...
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EVERYTHING on Axial Loading Normal Stress in 10 MINUTES - Mechanics of Materials; Author: Less Boring Lectures;https://www.youtube.com/watch?v=jQ-fNqZWrNg;License: Standard YouTube License, CC-BY