## Strength of materials |

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Page 69

What is the minimum

more than 3° in a 20-ft length when subjected to a torque of 10,000 ft-lb? What

maximum shearing stress is developed? G = 12 X 106 psi. Ana. d = 4.65 in.; S. =

6080 ...

What is the minimum

**diameter**of a solid steel shaft that will not twist throughmore than 3° in a 20-ft length when subjected to a torque of 10,000 ft-lb? What

maximum shearing stress is developed? G = 12 X 106 psi. Ana. d = 4.65 in.; S. =

6080 ...

Page 70

(a) Find the uniform shaft

8000 psi. (b) If a uniform

which one end of the shaft lags behind the other end. G = 12 X 106 psi. Ans. d -

2.81 in.

(a) Find the uniform shaft

**diameter**so that the shearing stress will not exceed8000 psi. (b) If a uniform

**diameter**of 4 in. is specified, determine the angle bywhich one end of the shaft lags behind the other end. G = 12 X 106 psi. Ans. d -

2.81 in.

Page 84

PROBLEMS 343. Determine the maximum shearing stress and elongation in a

helical spring composed of 20 turns of J-in .-

in. when the spring is supporting a load of 400 lb. Use Eq. (3-10) and G = 12 X 10

° ...

PROBLEMS 343. Determine the maximum shearing stress and elongation in a

helical spring composed of 20 turns of J-in .-

**diameter**wire on a mean radius of 3in. when the spring is supporting a load of 400 lb. Use Eq. (3-10) and G = 12 X 10

° ...

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allowable stresses aluminum angle assumed axes axial load beam in Fig beam loaded beam shown bending bolt cantilever beam caused centroid CN CN column compressive stress Compute the maximum concentrated load concrete cover plate cross section deformation Determine the maximum diameter elastic curve end moments equal equivalent Euler's formula factor of safety fibers flange flexure formula free-body diagram ft long ft-lb Hence hinged Hooke's law horizontal ILLUSTRATIVE PROBLEMS lb/ft length loaded as shown main plate maximum shearing stress maximum stress midspan midspan deflection modulus Mohr's circle moments of inertia neutral axis obtain plane plastic positive product of inertia proportional limit radius ratio reaction Repeat Prob resisting restrained beam resultant segment shaft shear center shear diagram shearing force shown in Fig Solution Solve Prob span static steel strain tensile stress thickness torque torsional uniformly distributed load vertical shear weld zero