Axial loading | Stress | Strain | Mechanics | Mechanics of materials Beer & Johnston

Описание: 1.14 A couple M of magnitude 1500 N ? m is applied to the crank of an engine. For the position shown, determine (a) the force P required to hold the engine system in equilibrium, (b) the average
normal stress in the connecting rod BC, which has a 450-mm2uniform cross section
1.15 When the force P reached 8 kN, the wooden specimen shown failed in shear along the surface indicated by the dashed line. Determine the average shearing stress along that surface at the time of failure.
1.16 The wooden members A and B are to be joined by plywood splice Fig. P1.14 plates that will be fully glued on the surfaces in contact. As part of the design of the joint, and knowing that the clearance between the ends of the members is to be 1/4 in., determine the smallest allowable length L if the average shearing stress in the glue is not to exceed 120 psi.
1.17 A load P is applied to a steel rod supported as shown by an aluminum plate into which a 0.6-in.-diameter hole has been drilled. Knowing that the shearing stress must not exceed 18 ksi in the
steel rod and 10 ksi in the aluminum plate, determine the largest load P that can be applied to the rod.
1.20 The axial force in the column supporting the timber beam shown is P 5 20 kips. Determine the smallest allowable length L of the bearing plate if the bearing stress in the timber is not to exceed 400 psi.
1.21 An axial load P is supported by a short W8 3 40 column of cross sectional area A 5 11.7 in2
and is distributed to a concrete foundation by a square plate as shown. Knowing that the average normal stress in the column must not exceed 30 ksi and that the bearing stress on the concrete foundation must not exceed 3.0 ksi, determine the side a of the plate that will provide the most economical and safe design.
1.23 A 5/8-in.-diameter steel rod AB is fitted to a round hole near end C of the wooden member CD. For the loading shown, determine (a) the maximum average normal stress in the wood, (b) the distance b for which the average shearing stress is 100 psi on the surfaces indicated by the dashed lines, (c) the average bearing stress on the wood.
1.24 Knowing that Problems u 5 408 and P 5 9 kN, determine (a) the smallest allowable diameter of the pin at B if the average shearing stress in the pin is not to exceed 120 MPa, (b) the corresponding average bearing stress in member AB at B, (c) the corresponding average bearing stress in each of the support brackets at B.
1.25 Determine the largest load P that can be applied at A when u 5 608, knowing that the average shearing stress in the 10-mm-diameter pin at B must not exceed 120 MPa and that the average bearing stress in member AB and in the bracket at B must not exceed 90 MPa.
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