AMPLITUDE-DOMAIN MECHANICAL SPECTROSCOPY - A WAY TO SYSTEMATIC ANALYSIS

While mechanical spectroscopy analysis has been carried out mostly in the frequency domain (especially via temperature), the amplitude domai n has till now been far less considered. Some possible reasons for the above are indicated and amplitude-domain mechanical spectroscopy (ADM S), a promising investigation tool in materials science and engineerin g, is briefly introduced. Concerned mainly with elastic and dissipativ e phenomena, the amplitude-domain mechanical spectra are related to so me singularities or peculiarities in the so-called internal friction ( or modulus) amplitude-dependent curves (ADCs). A phenomenological anal ysis is thus proposed, which proved useful for translating the ADCs in to the relevant damping spectra vs. amplitude, thus performing ADMS. T he observed repetitiousness of likely fractalic regularities observed in ADCs seems to encourage a general model. A possible guideline in su ch a synthesis effort is indicated as an extension, in terms of genera lized mobile entities and pinning agents, of a previously advanced dis location damping model which uses the device of modelling the new comp lex picture mostly by a stretched-multipinned-twanged string.