STATICS+MECHANICS OF MATERIALS-ACCESS
2nd Edition
ISBN: 9781259748660
Author: BEER
Publisher: MCG
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Each of the four vertical Ilinks has an 8 x 36-mm uniform rectangular cross section and each of the four pins has a 16-mm diameter. Take P= 19 kN. 0.4 m C 0.25 m 0.2 m B. P Determine the average bearing stress at Bin member ABC, knowing that this member has a 10 x 50-mm uniform rectangular cross section. MPa. The average bearing stress at Bin member ABC is.
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.
Knowing that a 0.02-in. gap exists when the temperature is 75°F, determine (a) the temperature at which the normal stress in the alumi-num bar will be equal to –11 ksi, (b) the corresponding exact length of the aluminum bar.
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- In the structure shown, an 8-mm-diameter pin is used at A, and 12-mm-diameter pins are used at B and D. Knowing that the ultimate shearing stress is 100 MPa at all connections and that the ultimate normal stress is 250 MPa in each of the two links joining B and D, determine the allowable load P if an overall factor of safety of 2.6 is desired.arrow_forwardKnowing that the hole has a diameter of 9 mm, determine (a) the radius rf of the fillets for which the same maximum stress occursat the hole A and at the fillets, (b) the corresponding maximum allowable load P if the allowable stress is 100 MPa.arrow_forwardIn the structure shown, an 8-mm diameter pin is used at A, and 12- mm diameter pins are used at B and D. Knowing that the ultimate shearing stresses is 100 MPa at all connections and that the ultimate normal stress is 250 MPa in each of the two links joining B and D, determine the allowable load P if an overall factor of safety of 3.0 is desired.arrow_forward
- Knowing that, for the plate shown, the allowable stress is 125 MPa, determine the maximum allowable value of P when (a) r=12 mm, (b) r= 18 mmarrow_forwardDetermine the values of the stress in portions AC and CB of the steel bar shown Fig. when the temperature of the bar is 2508F, knowing that a close fit exists at both of the rigid supports when the temperature is 1758F. Use the values E=29 *106 psi and α=6.5 * 10–6/8F for steelarrow_forwardA 5-kN tensile load will be applied to a 50-m length of steel wire with E = 200 GPa. Determine the smallest diameter wire that can be used, knowing that the normal stress must not exceed 150 MPa and that the increase in length of the wire must not exceed 25 mm.arrow_forward
- Two portions of member AB are glued together along a plane forming an angle θ with the horizontal. Knowing that the ultimate stress for the glued joint is 2.55 ksi in tension and 1.35 ksi in shear, determine the range of values of θ for which the factor of safety of the members is at least 3.0.arrow_forwardKnowing that the allowable stress in section ABD is 10 ksi, determine the largest force P that can be applied to the bracket shown.arrow_forward6. A strain gage located at C on the surface of bone AB indicates that the average normal stress in the bone is 3.80 MPa when the bone is subjected to two 1200-N forces as shown. Assuming the cross section of the bone at C to be annular and knowing that its outer diameter is 25 mm, determine the inner diameter of the bone’s cross section at C.arrow_forward
- Link BD consists of a single bar 30 mm wide and 12 mm thick. Knowing that each pin has a 10-mm diameter, determine the maximum value of the average normal stress in link BD if (a) θ =0°(b) θ =90°.arrow_forwardDetermine the largest axial load P that can be safely supported by a flat steel bar consisting of two portions, both 10 mm thick and, respectively, 40 and 60 mm wide, connected by fillets of radius r=8 mm. Assume an allowable normal stress of 165 MPa.arrow_forwardThe Bars of the Pin-connected frame as shown are each 30mm and 60mm in section. Determine the maximum load P that can be applied without exceeding the allowable stresses of 100 MN/m2 in tension and 80 MN/m2 in compression.arrow_forward
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