Q-11 The rigid plate in Figure Q-11 is supported by bar (1) and by a double-shear pin connection at B. Bar (1) has a length L1 = 1500 mm., a cross-sectional area A1 = 300 mm², an elastic modulus E = 68.9 GPa, and a coefficient of thermal expansion of a = 22x10-/°C. The pin at B has a diameter of 11 mm. After load P has been applied and the temperature of the entire assembly has been decreased by 17°C, the total strain in bar (1) is measured as 570 µɛ (elongation). Assume dimensions of a= 300 mm. and b= 500 mm. Determine (a) the magnitude of load P. (b) the average shear stress in pin B.

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Q-11 The rigid plate in Figure Q-11 is supported by bar (1) and by a double-shear pin connection
at B. Bar (1) has a length L1 = 1500 mm., a cross-sectional area A1 = 300 mm², an elastic modulus
E = 68.9 GPa, and a coefficient of thermal expansion of a = 22x10-/°C. The pin at B has a
diameter of 11 mm. After load P has been applied and the temperature of the entire assembly has
been decreased by 17°C, the total strain in bar (1) is measured as 570 µɛ (elongation). Assume
dimensions of a= 300 mm. and b= 500 mm.
Determine
(a) the magnitude of load P.
(b) the average shear stress in pin B.
Transcribed Image Text:Q-11 The rigid plate in Figure Q-11 is supported by bar (1) and by a double-shear pin connection at B. Bar (1) has a length L1 = 1500 mm., a cross-sectional area A1 = 300 mm², an elastic modulus E = 68.9 GPa, and a coefficient of thermal expansion of a = 22x10-/°C. The pin at B has a diameter of 11 mm. After load P has been applied and the temperature of the entire assembly has been decreased by 17°C, the total strain in bar (1) is measured as 570 µɛ (elongation). Assume dimensions of a= 300 mm. and b= 500 mm. Determine (a) the magnitude of load P. (b) the average shear stress in pin B.
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