الفهرس 
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Abstract
The beginning of the rational theories of polar continua goes to e and f cosserat in 1909 developed a theory of elasticity with the concept of triedre by means of a variationnal principle the cosserats obtained equations for the blance of momenta in the dynamic case but they did not give a specific micronertia nor did a conservation law for the microinertia tensor which are crucial to the construction of constitutive equations and dynamical problems.