# Deformation Coefficient

Deformation coefficient of friction, also called coefficient of deformation, is the force restricting the movement of an object that is sliding or rolling and one or both surfaces are relatively soft and deformed by the forces. In the context of materials science and mechanics, deformation typically refers to the change in shape or size of a material when subjected to an external force or load.

### Various properties and coefficients may be used to describe deformation

**Strain**- A measure of how much a material deforms when subjected to an applied force.**Stress**- The force per unit area applied to a material, causing deformation.**Young's Modulus**- A material property that describes its stiffness or ability to resist deformation in response to an applied force. It's a constant for a given material.**Poisson's Ratio**- A dimensionless ratio that describes how a material deforms in one direction when subjected to deformation in another direction. It relates lateral strain to axial strain.**Shear Modulus**- A material property that quantifies its resistance to shearing deformation. It's relevant in cases where forces are applied parallel to the surface of a material.**Bulk Modulus**- A measure of a material's resistance to uniform compression or volume deformation.

Tags: Coefficient