Yield point may be defined as the point wherea)working stress ends and breaking stress beginsb)breaking stress ends and working stress beginsc)elastic behavior ends and plastic behavior beginsd)plastic behavior ends and elastic behavior beginsCorrect answer is option 'C'. Can you explain this answer?

Question

Answer

Ans. is itself the solution....... Initially, stress/strain ratio is constant....... but a point comes where the behavior of material changes and the ratio also changes......that particular point on the stress v/s strain curve is called yield point, after which the curve is no longer straight line......

Answer

Reason for the answer is:
At the yield point, stress in not proportional to strain i.e: hook's law is not obeyed. Hence the elastic behaviour ends and plastic behaviour begins.

Answer

Yield point may be defined as the point where elastic behavior ends and plastic behavior begins.

Explanation:
The yield point is an important concept in materials science and engineering that helps us understand the behavior of materials under stress. It is the point at which a material transitions from elastic deformation to plastic deformation. Here's a detailed explanation of each term and how they relate to the yield point:

1. Elastic behavior:
- When a material is subjected to stress, it initially deforms elastically.
- Elastic deformation is reversible, meaning that when the stress is removed, the material returns to its original shape and size.
- It follows Hooke's law, which states that the stress is directly proportional to the strain (deformation) within the elastic limit.
- In this stage, the material experiences a linear relationship between stress and strain.

2. Plastic behavior:
- Once the stress on the material exceeds a certain point, known as the yield point, it undergoes plastic deformation.
- Plastic deformation is non-reversible, meaning that once the stress is removed, the material will not return to its original shape and size.
- The material undergoes permanent deformation, such as stretching or bending, without breaking.
- In this stage, the material experiences a non-linear relationship between stress and strain.

3. Yield point:
- The yield point is the stress level at which the material transitions from elastic to plastic behavior.
- It is the point where the material starts to undergo permanent deformation.
- At the yield point, the material begins to exhibit a non-linear stress-strain relationship.
- It signifies the limit of the material's elastic behavior and the onset of plastic behavior.

In conclusion, the yield point is the point at which a material transitions from elastic behavior (reversible deformation) to plastic behavior (permanent deformation) when subjected to stress. It represents the end of the material's elastic behavior and the beginning of its plastic behavior.

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