Mechanics of Materials
11th Edition
ISBN: 9780137605460
Author: Russell C. Hibbeler
Publisher: Pearson Education (US)
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The shaft is made from a solid steel section AB and a tubular
portion made of steel and having a brass core. If it is fixed to a
rigid support at A, and a torque of T = 50 lb.ft is applied to it at
C, determine the rotation angle that occurs at C relative to A and
compute the maximum shear stress and maximum shear strain in
the brass and steel. Take Gst = 11500 ksi, Gbr = 5600 Ksi.
3 ft
0.5 in.
B
1 in.
T = 50 lb•ft
The shaft consists of two sections that are rigidly connected. If the material is elastic perfectly plastic as shown, determine the largest torque T that can be applied to the shaft. Also, draw the shear-stress distribution over a radial line for each section. Neglect the effect of stress concentration.
The brass wire has a triangular cross section, 2 mm on a side. If the yield stress for brass is tY = 205 MPa, determine the maximum torque T to which it can be subjected so that the wire will not yield. If this torque is applied to the 4-m-long segment, determine the greatest angle of twist of one end of the wire relative to the other end that will not cause permanent damage to the wire. Gbr = 37 GPa.
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- The rod has a circular cross-section with a moment of inertia I. If a vertical force P is applied at A, determine the vertical displacement at this point. Only consider the strain energy due to bending. The modulus of elasticity is E.arrow_forwardThe 2-m-long tube is made of an elastic perfectly plastic material as shown. Determine the applied torque T, which subjects the material at the tube’s outer edge to a shear strain of gmax = 0.006 rad. What would be the permanent angle of twist of the tube when this torque is removed? Sketch the residual stress distribution in the tubearrow_forwardThe shaft has an outer diameter of 100 mm and an inner diameter of 80 mm. If it is subjected to the three torques, plot the shear stress distribution along a radial line for the cross section within region CD of the shaft. The smooth bearings at A and B do not resist torque. E 10 kN m B 15 kN m 5 kN-marrow_forward
- The copper pipe has an outer diameter of 40 mm and an inner diameter of 37 mm. If it is tightly secured to the wall at A and 3 torques are applied to it as shown, determine the absolute maximum shear stress developed in the pipe. Given the shear modulus G = 37 GPa for copper and the segmental lengths of the pipe, calculate the angle of twist of point D with respect to point A| B Length: AB = 0.6 m ´ 30 N-m 20 N-m BC = 0.6 m CD = 1.2 m 80 N-marrow_forwardThe rod has a circular cross-section with a polar moment of inertia J and moment of inertia I. If a vertical force P is applied at A, determine the vertical displacement at this point. Consider the strain energy due to bending andtorsion. The material constants are E and G.arrow_forwardThe copper pipe has an outer diameter of 3 in. and an inner diameter of 2.50 in. If it is tightly secured to the wall at C and it is subjected to the uniformly distributed torque along its entire length, determine the absolute maximum shear stress in the pipe. Discuss the validity of this result.arrow_forward
- The shaft consists of three concentric tubes, each made from the same material and having the inner and outer radii as shown. If the torque of T=800 N•m is applied to the rigid disk fixed to its end, determine the maximum shear stress in the shaft. S •5-9. The shaft consists of three concentric tubes, each made from the same material and having the inner and outer radii shown. If a torque of T the rigid disk fixed to its end, determine the maximum shear stress in the shaft. = 800 N• m is applied to T= 800 N.m r = 20 mm ro = 25 mm 2 m r; = 26 mm ro = 30 mm %3D r; = 32 mm 38 mm Prob. 5-9arrow_forwardIf the solid shaft AB to which the valve handle is attached is made of C83400 red brass and has a diameter of 10 mm, determine the maximum couple forces F that can be applied to the handle just before the material starts to fail. Take 7allow = 40 MPa. What is the angle of twist of the handle? The shaft is fixed at A. 150 mm 150 mm 150 mmarrow_forwardThe friction pad A is used to support the member,which is subjected to an axial force of P = 2 kN. Thepad is made from a material having a modulus ofelasticity of E = 4 MPa and Poisson’s ratio n = 0.4.If slipping does not occur, determine the normaland shear strains in the pad. The width is 50 mm.Assume that the material is linearly elastic. Also,neglect the effect of the moment acting on the pad.arrow_forward
- The copper pipe has an outer diameter of 3 in. and an inner diameter of 2.5 in. If it is tightly secured to the wall at C and a uniformly distributed torque is applied to it as shown, determine the shear stress at points A and B. These points lie on the pipe’s outer surface. Sketch the shear stress on volumeelements located at A and B.arrow_forwardThe shaft has a radius c and is subjected to a torque per unit length of t0, which is distributed uniformly over the shaft’s entire length L. If it is fixed at its far end A, determine the angle of twist f of end B. The shear modulus is G.arrow_forwardThe steel shaft has a radius of r=50 mm. Determine the torque (T) applied to the shaft if the two strain gages attached to the shaft surface record the deformations ?? ′ = −80 (10-6) and ?? ′ = 80 (10-6) Take E = 200 GPa, ν = 0.3. (Hint: you can assume that under torsional moment there is no deformation in x and y direction)arrow_forward
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