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  2. Constitutive equation - Wikipedia

    en.wikipedia.org/wiki/Constitutive_equation

    The first constitutive equation (constitutive law) was developed by Robert Hooke and is known as Hooke's law.It deals with the case of linear elastic materials.Following this discovery, this type of equation, often called a "stress-strain relation" in this example, but also called a "constitutive assumption" or an "equation of state" was commonly used.

  3. Continuum mechanics - Wikipedia

    en.wikipedia.org/wiki/Continuum_mechanics

    The concept of a continuous medium allows for intuitive analysis of bulk matter by using differential equations that describe the behavior of such matter according to physical laws, such as mass conservation, momentum conservation, and energy conservation. Information about the specific material is expressed in constitutive relationships.

  4. Governing equation - Wikipedia

    en.wikipedia.org/wiki/Governing_equation

    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.

  5. Viscoelasticity - Wikipedia

    en.wikipedia.org/wiki/Viscoelasticity

    The constitutive relation is expressed as a linear first-order differential equation: = + ˙ This model represents a solid undergoing reversible, viscoelastic strain. Upon application of a constant stress, the material deforms at a decreasing rate, asymptotically approaching the steady-state strain.

  6. Generalized Newtonian fluid - Wikipedia

    en.wikipedia.org/wiki/Generalized_Newtonian_fluid

    Although this type of fluid is non-Newtonian (i.e. non-linear) in nature, its constitutive equation is a generalised form of the Newtonian fluid. Generalised Newtonian fluids satisfy the following rheological equation: = (˙) ˙

  7. Burgers material - Wikipedia

    en.wikipedia.org/wiki/Burgers_material

    Schematic diagram of Burgers material, Maxwell representation. Given that one Maxwell material has an elasticity and viscosity , and the other Maxwell material has an elasticity and viscosity , the Burgers model has the constitutive equation

  8. A standoff between BlackRock and the FDIC is dragging into ...

    www.aol.com/finance/standoff-between-blackrock...

    The "passivity" agreement FDIC wants BlackRock to sign is designed to assure bank regulators that the giant money manager will remain a "passive" owner of an FDIC-supervised bank and won’t exert ...

  9. Newtonian fluid - Wikipedia

    en.wikipedia.org/wiki/Newtonian_fluid

    This constitutive equation is also called the Newton law of viscosity. The total stress tensor σ {\displaystyle {\boldsymbol {\sigma }}} can always be decomposed as the sum of the isotropic stress tensor and the deviatoric stress tensor ( σ ′ {\displaystyle {\boldsymbol {\sigma }}'} ):