Shear stress is a type of stress that occurs when two layers of a material or fluid slide against each other in opposite directions.
Shear stress is calculated by dividing the force applied parallel to the surface by the area of the surface. This is represented by the equation: τ = F/A, where τ is the shear stress, F is the force, and A is the area.
Shear stress is typically measured in units of force per area, such as pounds per square inch (psi) or newtons per square meter (N/m²).
The factors that affect shear stress include the force applied, the area of the surface, the type of material, and the velocity or rate at which the layers are sliding against each other.
Shear strain is the deformation or change in shape that occurs when a material is subjected to shear stress. The greater the shear stress applied, the greater the shear strain will be.