The bulk modulus is a measure of the resistance of a material to uniform compression. It is defined as the ratio of the change in pressure to the fractional change in volume of a material under compression:
Bulk modulus = -V * ΔP / ΔV
where V is the volume of the material, ΔP is the change in pressure, and ΔV is the corresponding change in volume.
The bulk modulus is a measure of the stiffness or rigidity of a material when subjected to uniform compression. Materials with a high bulk modulus are difficult to compress, while materials with a low bulk modulus can be compressed easily.
The bulk modulus is an important parameter in the study of elasticity and the deformation of materials under pressure. It is commonly used to describe the behavior of solids and fluids under compression, and is a key parameter in the design of materials for use in engineering and construction applications.
Examples of materials with high bulk moduli include diamond, steel, and glass, while materials with low bulk moduli include rubber and other polymers. The bulk modulus can also vary with temperature and pressure, and may be anisotropic, School Analytics, meaning that it may vary in different directions depending on the orientation of the material.