EBK MECHANICS OF MATERIALS
7th Edition
ISBN: 8220100257063
Author: BEER
Publisher: YUZU
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Chapter 1.2, Problem 20P
Three wooden planks are fastened together by a series of bolts to form a column. The diameter of each bolt is 12 mm and the inner diameter of each washer is 16 mm, which is slightly larger than the diameter of the holes in the planks. Determine the smallest allowable outer diameter d of the washers, knowing that the average normal stress in the bolts is 36 MPa and that the bearing stress between the washers and the planks must not exceed 8.5 MPa.
Fig. P1.20
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Three wooden planks are fastened together by a series of bolts to form a column. The diameter of each bolt is 12-mm and the inner
diameter of each washer is 16-mm, which is slightly larger than the diameter of the holes in the planks. Determine the smallest
allowable outer diameter d of the washers, knowing that the average normal stress in the bolts is 33 MPa and that the bearing stress
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The smallest allowable outer diameter d of the washers is
mm.
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
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.
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+22 mm
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Figure 4
Chapter 1 Solutions
EBK MECHANICS OF MATERIALS
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