ADIABATIC CONCEPT OF YOUNG'S MODULI IN METALS

摘要

The idea of an isothermal conversion of elastic stress into elastic strain by testing elastic moduli in metals is unrealistic. Recent findings suggest that the forces operating in the interior of metals under elastic strain are non-conservative, causing temperature changes and subsequent thermal dilatations to arise. Despite being imperceptible, the dissipations absorb a significant amount of deformation energy, which makes for the adiabatic nature of the Young moduli. The latent thermodynamics needs respecting in numerical predictions of structures' behaviour, especially if dynamic regimes are simulated.