Explanation

Also called modulus of volume elasticity. A materials constant is the ratio of the applied isostatic pressure to the volume strain of materials in the range of elastic deformation under the isostatic action. It represents the ability of materials to resist compression. Its value is determined by B=- P Δ V/V ? calculation, where P is the applied isostatic pressure, Δ V is the reduction in volume, and V ? is the original volume. bulk modulus is one of the most stable indexes in the mechanical properties of materials. The reciprocal (1/B) of bulk modulus B is called the compressibility of materials. For isotropic materials, tensile modulus E, shear modulus G, Poisson's ratio ν Compliance between E=2G (1) and bulk modulus B+ ν) = 3K (1-2 ν) Because materials always shrinks under isostatic pressing, B value is always positive. The definition formula is not only applicable to solids, but also to liquids and gases

Classification