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A bar of copper and steel form a composite system, which is heated to a temperature of 40ºC.The stress induced in the copper bar will be
- a)tensile
- b)compressive
- c)shear
- d)zero
Correct answer is option 'B'. Can you explain this answer?
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A bar of copper and steel form a composite system, which is heated to ...
Stress induced in the copper bar when heated
When a composite system of copper and steel is heated to a temperature of 40°C, the stress induced in the copper bar will be compressive.
Explanation:
1. Thermal Expansion Coefficient:
When subjected to heat, every material expands or contracts. The amount of expansion or contraction that occurs is determined by the thermal expansion coefficient of the material. Copper has a higher thermal expansion coefficient than steel, which means that when heated, copper will expand more than steel.
2. Difference in Expansion:
When a copper bar and a steel bar are joined together to form a composite system, and then heated, the copper bar will expand more than the steel bar. This creates a compressive stress in the copper bar and a tensile stress in the steel bar.
3. Stress Induced:
The stress induced in the copper bar will be compressive because the copper bar is expanding more than the steel bar, and this creates a compressive force on the copper bar. The tensile stress induced in the steel bar will be equal in magnitude to the compressive stress in the copper bar.
Conclusion:
Therefore, when a composite system of copper and steel is heated to a temperature of 40°C, the stress induced in the copper bar will be compressive.
When a composite system of copper and steel is heated to a temperature of 40°C, the stress induced in the copper bar will be compressive.
Explanation:
1. Thermal Expansion Coefficient:
When subjected to heat, every material expands or contracts. The amount of expansion or contraction that occurs is determined by the thermal expansion coefficient of the material. Copper has a higher thermal expansion coefficient than steel, which means that when heated, copper will expand more than steel.
2. Difference in Expansion:
When a copper bar and a steel bar are joined together to form a composite system, and then heated, the copper bar will expand more than the steel bar. This creates a compressive stress in the copper bar and a tensile stress in the steel bar.
3. Stress Induced:
The stress induced in the copper bar will be compressive because the copper bar is expanding more than the steel bar, and this creates a compressive force on the copper bar. The tensile stress induced in the steel bar will be equal in magnitude to the compressive stress in the copper bar.
Conclusion:
Therefore, when a composite system of copper and steel is heated to a temperature of 40°C, the stress induced in the copper bar will be compressive.
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Community Answer
A bar of copper and steel form a composite system, which is heated to ...
Thermal coductivity of copper is more so it try to expand early...but he is composite with steel so steel resist his expansion...so in copper compression is there
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A bar of copper and steel form a composite system, which is heated to a temperature of 40ºC.The stress induced in the copper bar will bea)tensileb)compressivec)sheard)zeroCorrect answer is option 'B'. Can you explain this answer?
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