A tie-down on the deck of a sailboat consists of a bent bar bolted at both ends, as shown in the figure. The diameter dg of the bar is 1/4 in., the diameter dw of the washers is 7/8 in., and the thickness t of the fiberglass deck is 3/8 in. If the allowable shear stress in the fiberglass is 300 psi, and the allowable bearing pressure between the washer and the fiberglass is 550 psi, what is the allowable load Patlow on the tie-down? dg- - dw Mp-

A tie-down on the deck of a sailboat consists of a bent bar bolted at both ends, as shown in the figure. The diameter dg of the bar is 1/4 in., the diameter dw of the washers is 7/8 in., and the thickness t of the fiberglass deck is 3/8 in. If the allowable shear stress in the fiberglass is 300 psi, and the allowable bearing pressure between the washer and the fiberglass is 550 psi, what is the allowable load Patlow on the tie-down? dg- - dw Mp-

Steel Design (Activate Learning with these NEW titles from Engineering!)

6th Edition

ISBN:9781337094740

Author:Segui, William T.

Publisher:Segui, William T.

Chapter1: Introduction

Section: Chapter Questions

Problem 1.5.6P: The data in Table 1.5.3 were obtained from a tensile test of a metal specimen with a rectangular...

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The data in Table 1.5.3 were obtained from a tensile test of a metal specimen with a rectangular cross section of 0.2011in.2 in area and a gage length (the length over which the elongation is measured) of 2.000 inches. The specimen was not loaded to failure. a. Generate a table of stress and strain values. b. Plot these values and draw a best-fit line to obtain a stress-strain curve. c. Determine the modulus of elasticity from the slope of the linear portion of the curve. d. Estimate the value of the proportional limit. e. Use the 0.2 offset method to determine the yield stress.
A tensile test was performed on a metal specimen having a circular cross section with a diameter 0. 510 inch. For each increment of load applied, the strain was directly determined by means of a strain gage attached to the specimen. The results are, shown in Table: 1.5.1. a. Prepare a table of stress and strain. b. Plot these data to obtain a stress-strain curve. Do not connect the data points; draw a best-fit straight line through them. c. Determine the modulus of elasticity as the slope of the best-fit line.
A tie- down on the deck of a sailboat consists of a bent bar bolted at both ends, as shown in the figure. The diameter dB of the bar is 6mm, the diameter dW of the washers is 22 mm; and the thickness t of the fiberglass is 10mm. If the allowable shear stress in the fiberglass is 2.1 MPa, and the allowable bearing pressure between the washer and the fiberglass is 3.8 MPa, what is the allowable load Pallow on the tie- down?
A tie-down on the deck of a sailboat consists of a bent bar bolted at both ends, as shown in the figure. The diameter d_B of the bar is 1/4 in., the diameter d_W of the washers is 7/8 in., and the thickness t of the fiberglass deck is 3/8 in. If the allowable shear stress in the fiberglass is 300 psi, and the allowable bearing pressure between the washer and the fiberglass is 550 psi, what is the allowable load P_allow on the tie-down?
A 1 meter long steel rod AB of 15-mm diameter is held snugly (without any initial stresses) between rigid walls by the arrangement shown in the figure. (STEEL ROD : E = 200 GPa , α= 12 x 10-6/°C , and yield strength σY = 250 MPa.) a) If the rod undergoes a temperature drop of 24°C, and the bolt at B is tightened causing the rod to elongate by 0.0566 mm, determine the bearing stress between the washer and the wall. b) Determine the amount of temperature drop that is allowed if the factor of safety against yieldingis 4.
A steel rod of 15- mm diameter is held snugly (but without any initial stresses) between rigid walls by the arrangement shown in the figure part (a). (For the steel rod, use α = 12 x 10-6/˚C and E = 200 GPa.) Calculate the temperature drop ΔT (degrees Celsius) at which the average shear stress in the 12 – mm diameter bolt becomes 45 MPa. Also, what is the normal stress in the rod? What are the average bearing stresses in the bolt and clevis at A and between the washer (dW = 20mm) and wall (t = 18 mm) at B? If the connection to the wall at B is changed to an end plate with two bolts (see figure part b), what is the required diameter db of each bolt if the temperature drop is ΔT = 38˚C and the allowable bolt stress is 90 MPa?
A hollow aluminum tube used is a roof structure has an outside diameter d2 and inside diameter d1. The tube is 2.5m long and the aluminum has a shear modulus of G=28 GPa. a.If the tube is twisted in pure torsion by torques acting at the ends,what is the angle of twist in degrees when the max shear stress is 50MPa? b.What diameter “d” is required for a solid shaft to resist the same torque with the same maximum stress? d1 = 90 (mm) d2 = 110 (mm)
The pin‐connected assembly shown in Figure below consists of solid aluminum [E = 70 GPa] rods (1) and (2) and solid steel [E = 200 GPa] rod (3). Each rod has a diameter of 16 mm. Assume that a = 2.5 m, b = 1.6 m, and c = 0.8 m. If the normal stress in rod (1) must not exceed 150 MPa, determine (a) the maximum load P that may be applied at A. (b) the magnitude of the resulting deflection at A.
Determine the average normal stress in each rod if T2=400∘F Calculate the new length of the aluminum segment.
The polymer bar shown in the figure below has a width of b=55b=55 mmmm, a depth of d=104d=104 mmmm, and a height of h=274h=274 mmmm. At a compressive load of P=120P=120 kNkN, the bar height contracts by Δh=−2.60Δ⁢h=-2.60 mmmm, and the bar depth elongates by Δd=0.36Δ⁢d=0.36 mmmm. At this load, the stress in the polymer bar is less than its proportional limit. Determine: (a) the modulus of elasticity. (b) Poisson’s ratio. (c) the change in the bar width bb.
A hollow aluminum tube used in a roof structure has an outside diameter d2= 112mm and an inside diameter d1= 80mm. The tube is 2.80m long, and the aluminum has a shear modulus of G= 28GPa.a. If the tube is twisted in pure torsion by torques acting at the ends, what is the angle of twist, in degrees,when the maximum shear stress is 52MPa?b. What diameter d, in mm, is required for a solid shaft, as shown, to resists the same torque with the same maximum stress?c. What is the ratio of the weight of the hollow tube to the weight of the solid shaft?
Before the 400 kN load is applied, the rigid platform rests on two steel bara, each of cross sectional area 1400mm^2, as shown in the figure. The cross sectional area of the aluminum bar is 2800 mm^2, Use E=200 GPa for steel and E = 70 GPa for aluminum. NEGLECT the weight of the platform A.) Compute the stress in the aluminum bar in Mpa after the 400 kN load is applied Choices: 45.64,16.30,40.62,14.51 B.) Compute the stress in the steel bar in Mpa Choices: 68.03,95.24,128.35,126.56 C.) Compute the shortening of the steel bar in mm. Choices: 0.125,0.085,0.113,0.158