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All of the following statements are correct, except.
  • a)
    Thermal stresses are set up when any deformation arising from change in temperature in prevented.
  • b)
    A member free to expand or contract due to rise or fall of temperature is not subjected to any stress.
  • c)
    For a composite bar of different materials of equal lengths, the deformation per unit length, i.e., strain in each bar is equal.
  • d)
    Each member of a composite bar is subjected to the load equal to the total external load impressed on the arrangement.
Correct answer is option 'D'. Can you explain this answer?
Verified Answer
All of the following statements are correct, except.a)Thermal stresses...
Each member of a composite bar is subjected to same strain.
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Most Upvoted Answer
All of the following statements are correct, except.a)Thermal stresses...
Thermal stresses are set up when any deformation arising from a change in temperature is prevented. When a material is unable to expand or contract freely due to external constraints, it experiences thermal stresses. These stresses can lead to deformation or failure of the material.

A member that is free to expand or contract due to a rise or fall in temperature is not subjected to any stress. When a material is allowed to expand or contract freely, it can accommodate the changes in dimension without developing any internal stresses. This is because the material is able to adjust its shape and size in response to temperature changes.

For a composite bar made of different materials of equal lengths, the deformation per unit length, i.e., the strain in each bar, is equal. This is because the length of each material remains the same under the applied load, and the strain is defined as the change in length per unit length. Therefore, the strain experienced by each bar is the same.

Each member of a composite bar is not subjected to a load equal to the total external load impressed on the arrangement. In a composite bar, the load is distributed among the different materials based on their stiffness or Young's modulus. Each material carries a portion of the total load proportional to its stiffness. This distribution of load ensures that each material is subjected to an appropriate level of stress based on its mechanical properties.

In summary, the correct statement is option 'D'. Each member of a composite bar is not subjected to a load equal to the total external load impressed on the arrangement.
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All of the following statements are correct, except.a)Thermal stresses are set up when any deformation arising from change in temperature in prevented.b)A member free to expand or contract due to rise or fall of temperature is not subjected to any stress.c)For a composite bar of different materials of equal lengths, the deformation per unit length, i.e., strain in each bar is equal.d)Each member of a composite bar is subjected to the load equal to the total external load impressed on the arrangement.Correct answer is option 'D'. Can you explain this answer?
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