What is the Shear Modulus? What's the Shear Modulus? The shear modulus measures how a cloth responds to forces that strive to vary its form. Materials can react otherwise to shear depending on their sort and how the force is utilized. The shear modulus of supplies like rubber is low, while supplies like diamond have very high values. The shear modulus is outlined as the ratio of shear stress to shear strain. It is also known because the modulus of rigidity and may be denoted by G or much less generally by S or μ. The SI unit of shear modulus is the Pascal (Pa), however values are normally expressed in gigapascals (GPa). In English items, shear modulus is given by way of pounds per sq. inch (PSI) or kilo (1000's) pounds per square in (ksi). A large shear modulus value signifies a stable is extremely rigid. In other words, a large pressure is required to provide deformation. A small shear modulus worth signifies a solid is mushy or flexible. Little power is required to deform it. One definition of a fluid is a substance with a shear modulus of zero. Any force deforms its floor. The shear modulus is determined by measuring the deformation of a strong from making use of a drive parallel to one floor of a strong, whereas an opposing pressure acts on its opposite floor and holds the stable in place. Consider shear as pushing in opposition to one facet of a block, with friction as the opposing pressure. Another example would be making an attempt to cut wire or hair with dull scissors.