Principles

Continuum Mechanics

General Principals

Constitutive Properties

Application to All Materials

Specific Ones

Conservation of mass Elastic Solids (isotropic, orthotropic, anisotropic)
Principle of linear (Newstons I) and angular (N-II) momentum Viscous / inviscid fluids
Principle of moment of inertia Inelastic materials (viscoelastic / viscoplastic material with memory)
I / II law of thermodynamics (principles of energy / entropy)

Governing Laws:

              -  Material frame indifference

              -  Principal of local action