Abstract
Damping treatment is a standard practice in many industries for controlling excessive vibration at resonance. Different damping materials are available for various engineering applications. Wax is one of them, and it’s mostly used in musical instruments. There are two types of wax are available namely beeswax (natural wax) and cosmetic wax. The aim of the present study is to measure damping properties of these two types of wax using Oberst Beam Method (OBM). The effects of damping material’s thickness and bare sample on damping loss factor are studied.
Highlights
Damping is a phenomenon in which mechanical energy is dissipated as heat in dynamical systems and is used for controlling excessive vibration at resonance
Using Oberst Beam Method (OBM), Jones [5] studied effect of temperature and frequency on the dynamic properties of damping material and showed that these parameters have a significant role in materials damping measurement.Wojtowicki et al [6] proposed an alternative approach for measuring the damping properties of materials to avoid the experimental uncertainties and to improve the accuracy of the measurements
It can be observed that composite loss factor is increasing with respect to damping material thickness as well as bare beam thickness
Summary
Damping is a phenomenon in which mechanical energy is dissipated as heat in dynamical systems and is used for controlling excessive vibration at resonance. Reduction in the level of vibration amplitude depends on structure and damping material properties. Oberst Beam Method (OBM) is well-known and recommended by ASTM [1] and SAE [2] standards for evaluation and measurement of material damping properties. Instead of using conventional capacitive sensor, Jung et al [7] used a Microflown velocity sensor for measuring loss factor, resonance factor and Young’s modulus of structural steel and polycarbonate. They compared measured results with standard OBM and analytically estimated results and proved that results from all the methods are in good agreement
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