Assessment study for DMA of metallic foams

In this work, preliminary design of a dynamic mechanical analysis (DMA) measuring system has been performed. The setup was devoted to measuring the mechanical characteristics of metallic foams (porous material) candidates as passive vibration isolators. The main focus was, therefore, finding the ability of these kind materials in terms of energy dissipation. A setup has been designed to measure damping characteristic of the metallic foams in the dynamic compression test. The test has been prepared the condition for future work in metallic foams by considering different criteria such as testing in the different excitation frequencies, the amplitude of the deformation, and pre-strain deformation range. A 3D model of the setup was developed to represent the static and dynamic analysis related to the test and investigate the effect of these analyses on the results. Moreover, a sample of polyamide materials has been tested with this setup test to verify whether it provides reliable and dependable results or not. The results have been achieved from testing the polyamide materials can be our guide to the next level, which will be observing the behavior of metallic foams under the same condition.

L’obiettivo di questo lavoro è la progettazione di un setup per la caratterizzazione dinamica di schiume da utilizzarsi come smorzatori passivi. Pertanto si è progettato un setup per caratterizzare le schiume in test di compressione. Si è sviluppato un modello 3D del sistema di misura per valutarne le caratteristiche statiche e dinamiche per valutare l’applicabilità con differenti frequenze d’eccitazione e forze di precarico. Infine, la validazione del setup utilizzato è stata effettuata utilizzando un materiale plastico con caratteristiche meccaniche note.