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In physics and engineering, a constitutive equation or constitutive relation is a relation between two or more physical quantities (especially kinetic quantities as related to kinematic quantities) that is specific to a material or substance or field, and approximates its response to external stimuli, usually as applied fields or forces.
Continuum mechanics deals with the behavior of materials that can be approximated as continuous for certain length and time scales. The equations that govern the mechanics of such materials include the balance laws for mass, momentum, and energy. Kinematic relations and constitutive equations are
In physics, there are equations in every field to relate physical quantities to each other and perform calculations. Entire handbooks of equations can only summarize most of the full subject, else are highly specialized within a certain field. Physics is derived of formulae only.
Classical mechanics is the branch of physics used to describe the motion of macroscopic objects. [1] It is the most familiar of the theories of physics. The concepts it covers, such as mass, acceleration, and force, are commonly used and known. [2]
Pages in category "Equations of physics" The following 53 pages are in this category, out of 53 total. ... Chandrasekhar's white dwarf equation; Constitutive equation;
In physics, transport phenomena are all irreversible processes of statistical nature stemming from the random continuous motion of molecules, mostly observed in fluids.Every aspect of transport phenomena is grounded in two primary concepts : the conservation laws, and the constitutive equations.
Cauchy momentum equation; Cauchy number; Cauchy stress tensor; Clapeyron's theorem; Clausius–Duhem inequality; Collapsible flow; Compatibility (mechanics) Compression (physics) Constitutive equation; Configurational mechanics; Control volume; Convective momentum transport; Creep and shrinkage of concrete; Critical resolved shear stress ...
A governing equation may also be a state equation, an equation describing the state of the system, and thus actually be a constitutive equation that has "stepped up the ranks" because the model in question was not meant to include a time-dependent term in the equation.