In the figure, the rigid ABC rod is held horizontally by two elastic rods made of steel and bronze materials at E points A and B. The cross-sectional area of the steel bar is A,=10 cm² and the cross-sectional area of the bronze bar is A,=50 cm². There is no stress in the bars initially. 5m - steel Calculate the forces that will occur in the elastic rods when the temperature decrease by 50 °C. B A Note: - For steel, modulus of elasticity is E=210 GPa and coefficient of thermal expansion is a,=12x10“1/°C 4m bronze rigid - For bronze, modulus of elasticity is E,=90 GPa and coefficient of thermal expansion is a,=19x10“ 1/°C D 5m 3m
In the figure, the rigid ABC rod is held horizontally by two elastic rods made of steel and bronze materials at E points A and B. The cross-sectional area of the steel bar is A,=10 cm² and the cross-sectional area of the bronze bar is A,=50 cm². There is no stress in the bars initially. 5m - steel Calculate the forces that will occur in the elastic rods when the temperature decrease by 50 °C. B A Note: - For steel, modulus of elasticity is E=210 GPa and coefficient of thermal expansion is a,=12x10“1/°C 4m bronze rigid - For bronze, modulus of elasticity is E,=90 GPa and coefficient of thermal expansion is a,=19x10“ 1/°C D 5m 3m
Chapter2: Loads On Structures
Section: Chapter Questions
Problem 1P
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Transcribed Image Text:QUESTION 1) In the figure, the rigid ABC rod is held horizontally by
E
two elastic rods made of steel and bronze materials at
points A and B. The cross-sectional area of the steel bar
is A,=10 cm and the cross-sectional area of the bronze
bar is A,=50 cm. There is no stress in the bars initially. 5m
Calculate the forces that will occur in the elastic rods
when the temperature decrease by 50°C.
steel
В
A
Note: - For steel, modulus of elasticity is E=210 GPa
and coefficient of thermal expansion is a,=12x10“ 1/°C 4m
bronze
rigid
- For bronze, modulus of elasticity is E,=90 GPa
and coefficient of thermal expansion is a,=19x10“ 1/C
D
5m
3m
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