Compare the bar (a) or bar (b) which will stretch more when subjected to same force F. Compare the bar (a) or bar (c) which will stretch more when subjected to same force F.

Question

The lower ends of the three bars shown in the figure are at the same level before the rigid homogeneous W = 100 kN block is attached. The properties of the bars are shown in the table. Steel Bronze Length, L Area, A Modulus of elasticity, E Coefficient of thermal expansion, a 1.00 m 500 mm? 1.60 m 900 mm 200 GPa 83 GPa 11.7x106 /°C 18x10 /°C Bronze Steel Steel W The temperature of the bars is then increased by 80°C. The block is assumed to remain horizontal after all deformations have occurred. Which of the following most nearly gives the stress developed in the steel bar?

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Chapter 10, Problem 47P

To determine

Compare the bar (a) or bar (b) which will stretch more when subjected to same force F.

Compare the bar (a) or bar (c) which will stretch more when subjected to same force F.

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The lower ends of the three bars shown in the figure are at the same level before the rigid homogeneous W = 100 kN block is attached. The properties of the bars are shown in the table. Steel Bronze Length, L Area, A Modulus of elasticity, E Coefficient of thermal expansion, a 1.00 m 500 mm? 1.60 m 900 mm 200 GPa 83 GPa 11.7x106 /°C 18x10 /°C Bronze Steel Steel W The temperature of the bars is then increased by 80°C. The block is assumed to remain horizontal after all deformations have occurred. Which of the following most nearly gives the stress developed in the steel bar?

The lower ends of the three bars in the figure are rigid homogeneous W = at the same level before the 100 kN block is attached. The temperature of the bars is then increased by 80°c. The block is assumed to remain horizontal after all deformations have occurred. The properties of the bars are shown in the table. STEEL BRÖNZE Length, L Area, A Modulus of Elasticity, E Coefficient of Thermal Expansion, a 1.0 m 1.6 m 500 mm2 900 mm? 200 GPa 83 GPa 11.7x10-6 mm/ (mm-°c) 18x10-6 mm/ (mm-°C) Calculate the stress developed in the bronze bar. Bronze Steel Steel A Calculate the stress developed in the steel bar. FIGURE 10

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