BE 110 - Mechanics of Materials – Fall 2001 Exam 1 – Concepts of Stress and Strain洗煤厂设备
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1. Four 10-mm-diameter steel bolts are ud to connect a
steel plate tension member (7 mm by 70 mm) to a
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support as shown. For the steel plate tension member,
the yield strength is σy = 345 MPa. For the bolts, the
ultimate shear strength is τult = 240 MPa. A factor of
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safety of 2.5 is to be ud for both the normal and shear
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stress considerations. Determine the allowable load P
that can be carried by the connection. (10 points)
BE 110 - Mechanics of Materials – Fall 2001 Exam 1 – Concepts of Stress and Strain
价格的英文2. For the device shown in the illustration, compute the
tensile stress in the 0.5-inch-diameter aluminum tie
rods and the compressive stress in the plastic bar.
(10 points)
吃一堑长一智作文3. Rigid bar ABC is supported by a pin at A and by a small
steel wire (d = 0.125 in) at B. The modulus of elasticity of the steel wire (1) is E = 29,000,000 psi and the coefficient of thermal expansion is α = 6.5 x 10-6 in/in/°F. After weight W is applied to the rigid bar at C and the temperature of the apparatus is incread by ∆T = +120°F, the downward
deflection of the rigid bar at C is measured as ∆C = 0.14 in
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. Determine the magnitude of weight W. (20 points)
