2.3.3 In order to make an adjustment, a group of engineering students remove leg D from a laboratory worktable. To ensure that the tableremains stable, they place a 5.1-kg stack of statics textbooks centered at point E of the tabletop as shown. Determine the normalreaction force at each leg A, B, and C. The uniform tabletop has a mass of 45.6 kg, and each leg has a mass of 4.6 kg.5.1 kg0.6 m0.3 m1.6 m0.7 mEBAAnswers:NA=NB=i+---Z ZNNNNc=

Answered: In order to make an adjustment, a group…

Structural Analysis

6th Edition

ISBN:9781337630931

Author:KASSIMALI, Aslam.

Publisher:KASSIMALI, Aslam.

Chapter2: Loads On Structures

Section: Chapter Questions

Problem 1P

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2.41 The device shown consists of a disk that is rotated by a shaft. The disk is positioned very close to a solid boundary. Be- tween the disk and the boundary is viscous oil. a. If the disk is rotated at a rate of 1 rad/s, what will be the ra- tio of the shear stress in the oil at r = 2 cm to the shear stress at r = 3 cm? b. If the rate of rotation is 2 rad/s, what is the speed of the oil in contact with the disk atr = 3 cm? c. Ifthe oil viscosity is 0.01 N s/m² and the spacing y is 2 mm, what is the shear stress for the conditions noted in part (b)? 2 Pipe Oil film Cylinder PROBLEM 2.40
Question 4: A machine of 540 kg is bolted at the middle of two parallel simply supported steel beams. The clear span of the beam is 2.4 m. The moment of inertia of the cross-section of each beam is I = 4.2×10¯6 mª. The Young's modulus of the steel is E 200 GPa. When the machine is operating, it will generate a vertical force P(t)=Posinot. When the machine runs at 300 rpm, Po= 1500 N. Neglect the weight of the beams and assume 2% viscous damping in the system. Determine the amplitude of steady-state deflection of the beams at their midpoint when the machine runs at 300 rpm. machine 1.2 m = 1.2 m Steel beams
1. Given that the value of P on the figure below is equal to 15 kN which is applied to the centroidal axis of each segment of the rod which is made up of aluminum, bronze and steel which are rigidly connected. Determine the stress in each material in the rod. Steel A=300 mm2 Bronze Aluminum A=400 mm2 A=600 mm2 2P ЗР 4P P 3m+ 5 m 4 m-
The cylindrical pressure vessel shown in the figure has an inside diameter of 995 mm and a wall thickness of 12 mm. The cylinder is made of an aluminum alloy that has an elastic modulus of E = 72 GPa and a shear modulus of G = 27.3 GPa. Two strain gages are mounted on the exterior surface of the cylinder at right angles to each other. The angle O is 24°. If the pressure in the vessel is 1.81 MPa, determine: (a) the strains that act in the x and y directions. (b) the strains expected in gages a and b. (c) the normal stresses o, and o. (d) the shear stresS Trt . b. 90°
Question 3 (Axial Loading) A steel tube surrounds a solid aluminum cylinder as shown in shown in figure 3.0 below. The assembly is compressed between rigid cover plates by centrally applied forces as shown in the figure. The aluminum cylinder is 7.5 cm in diameter and the outside diameter of the steel tube is 9.0 cm. If P is 170 kN, find the stress in the steel and in the aluminum members. Esteel = 200 GPa. EAluminum = 70 GPa. TP Figure 3.0
Q.7
a 3 m long cantilever beam (i.e., a beam fixed at one end) that carries a 500 kg concentrated point load at the free end. Calculate the maximum tensile stress in the beam for the beam section dimensions shown below (Assume solid and homogeneous material; use g = 9.81 m/s2) give answer in N/m^2
A steel column of length 6 m forms part of a support structure and is subjected toan axial compressive load ‘P’ as shown in Figure Q3(b). Both ends of the columnare fixed. The column has the ‘I’ cross-section also detailed in Figure Q3(b). TheYoung’s modulus (E) for the steel is 210 GN/m2.i) Determine the slenderness ratio for the column and show that Eulertheory is valid. ii) Calculate the critical buckling load using Euler theory. iii) Evaluate the safe working load for the column if a load factor of3 is required.
Please solve it fast ,Am not sure about answer 51.05Mpa , need Clarification.
The beam shown in the figure below (Figure 1) is made of steel that has an allowable stress of σallow 14 ksi. Part A Figure く 1 of 1 Determine the largest internal moment the beam can resist if the moment is applied about the z axis. Express your answer to three significant figures. ΕΠΙ ΑΣΦ vec (Mallow) z = Submit Request Answer Part B ? kip.ft Determine the largest internal moment the beam can resist if the moment is applied about the y axis. Express your answer to three significant figures. (Mallow) y = ΕΠΙ ΑΣΦ vec Submit Request Answer 0.25 in 0.25 in. _ E 3 in. 3 in. To.25 in. < Return to Assignment 3 in. 3 in. Provide Feedback ? kip.ft
VECHANICS OF D. 5. 73.8% THERMAL STRESS Steel Rod d = 20 mm L = 5 m E = 200 GPa a = 11.70 µm/(m-°C) p = 8,000 kg/m³ 1. A steel rod is positioned vertically as shown in the figure. It is fixed at one end and unsupported at the other end. An external force (F = 800 N) is applied to the free end of the rod the same time when the temperature is raised by 25 C. Assume that all deformations will happen at the same time, compute the stress developed in the steel rod if the gap between the free end of the steel rod and the ground is 0.20 mm. %3D GAP
11.3 (A) Calculate the strain energy stored in a bar of circular cross-section, diameter 0.2 m, length 2 m: (a) when subjected to a tensile load of 25 kN, (b) when subjected to a torque of 25 kNm, (c) when subjected to a uniform bending moment of 25 kNm. For the bar material E= 208 GN/m³, G = 80 GN/m². [0.096, 49.7, 38.2 N m.]

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