Question

The slope of the stress-strain curve in the elastic deformation region is

• A. Elastic modulus
• B. Plastic modulus
• C. Poisson’s ratio
• D. None of the mentioned

Hint:

The elastic modulus is a fundamental material property that determines how much a material will deform under stress in the elastic region.

Answer 1

The Correct Option is A

Step 1: Understanding Stress-Strain Curve
The stress-strain curve describes how a material deforms under applied stress.
In the elastic region, the material returns to its original shape after the stress is removed.
Step 2: Elastic Modulus
The slope of the stress-strain curve in the elastic deformation region is known as the elastic modulus, which measures the material's stiffness.
It is calculated as the ratio of stress to strain: \[ E = \frac{\sigma}{\varepsilon} \] Where:
\( E \) is the elastic modulus,
\( \sigma \) is the stress,
\( \varepsilon \) is the strain.

Step 3: Conclusion
Thus, the slope of the stress-strain curve in the elastic region is the elastic modulus.