Deformation of Solids 💗 Solid is characterized by very packed particles and they are not free to move around within the substance. A solid can change its shape when pressure is applied to it. The forces applied to the solids will amend the position of the solid particles and its spacings. This will then changes the external structure or shape and size of the solid, which defines deformation of solids. Stress is the measure of the force required to cause solid deformation. A strain is the measure of the degree of deformation. The strain is given as a fractional change in either the length, geometry or volume. It is a dimensionless number. The greater the stress , the greater the strain . The proportionality constant in this relation is known as the Young's modulus,Y . Stress = Young's modulus,Y ❌ strain The ratio of stress to strain is kn own as Young's modulus . It defines the amount of force requi