Adiabatic and Isothermal Moduli for Perfect Elastic Materials

Difference between Adiabatic and Isothermal Moduli for Perfect Elastic Materials 

For shear, it is usually stated that at small strains the moduli G d and 7/ are identical in isotropic solids.For a solid in which G is directly proportional to T, as is closely approximated by soft rubbers, a thermodynamic calculation gives 

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