What are the elastic modulus (E) and the Poisson's ratio () used to indicate? 2. Illustrate the differences between actual stress and engineered stress with strain, and also describe their underlying physical concepts. 3. If the engineering strain is 2% for a specific state of uniaxial stress, what is the real strain?
1. What are the elastic modulus (E) and the Poisson's ratio () used to indicate?
2. Illustrate the differences between actual stress and engineered stress with strain, and also describe their underlying physical concepts.
3. If the engineering strain is 2% for a specific state of uniaxial stress, what is the real strain?
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The elastic modulus (E) and Poisson's ratio are two important parameters used to describe the mechanical properties of materials.
The elastic modulus and Poisson's ratio are two distinct mechanical properties used to describe how a material behaves under stress.
Elastic modulus:- Also known as Young's modulus, measures a material's stiffness or resistance to deformation under stress. A higher value of E indicates a stiffer material that requires more stress to produce the same amount of deformation as a more compliant material with a lower E value.
Poisson's ratio: - Describes how a material responds to stress in terms of its lateral or transverse deformation relative to its axial or longitudinal deformation. It is defined as the ratio of transverse strain to axial strain in the linear elastic region of a material's stress-strain curve. Poisson's ratio can be positive or negative, depending on the material, and provides valuable information about a material's ability to expand or contract in different directions under stress. Together, the elastic modulus and Poisson's ratio provide important insights into a material's mechanical behavior, making them crucial parameters for material selection and engineering design.
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for 2 can you please do a sketech veriation of it?
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