The Sonic Resonance Method and the Impulse Excitation Technique: A Comparison Study

Tomáš Húlan,Ján Ondruška,Igor Štubňa,Filip Obert,Anton Trník

doi:10.3390/app112210802

Abstract

In this study, resonant frequencies of flexurally vibrating samples were measured using the sonic resonant method (SRM) and the impulse excitation technique (IET) to assess the equivalency of these two methods. Samples were made from different materials and with two shapes (prism with rectangular cross-section and cylinder with circular cross-section). The mean values and standard deviations of the resonant frequencies were compared using the t-test and the F-test. The tests showed an equivalency of both methods in measuring resonant frequency. The differences between the values measured using SRM and IET were not significant. Graphically, the relationship between the resonant frequencies is a line with a slope of 0.9993 ≈ 1.

Highlights

Young’s modulus is a mechanical quantity of great importance for solid materials
Using impulse excitation technique (IET), Quaglio et al [2] determined Young’s modulus of samples from basalt and diabase mines used as aggregates in the construction industry
Radovic et al [7] compared four different experimental techniques, namely, resonant ultrasound spectroscopy (RUS), impulse excitation, nanoindentation, and the four-point bending test to determine Young’s and shear moduli of 99.9% pure Al2O3, 7075 aluminum, 4140 steel, and Pyrex glass. They found that dynamic methods (RUS and IET) have superior precision and repeatability, and the differences between the results of RUS and IET were not statistically significant

Summary

Introduction

Young’s modulus is a mechanical quantity of great importance for solid materials. It depends on different external influences, in addition to the intrinsic properties of the measured material. Thomaz et al [1] studied Young’s modulus of concrete containing basaltic aggregates using static and dynamic methods, such as the ultrasonic pulse velocity (UPV) and impulse excitation technique (IET). Radovic et al [7] compared four different experimental techniques, namely, resonant ultrasound spectroscopy (RUS), impulse excitation, nanoindentation, and the four-point bending test to determine Young’s and shear moduli of 99.9% pure Al2O3, 7075 aluminum, 4140 steel, and Pyrex glass. They found that dynamic methods (RUS and IET) have superior precision and repeatability, and the differences between the results of RUS and IET were not statistically significant. Haines et al [8] compared the results from a resonance flexure method and from four-point static flexure tests for wood samples

Objectives

Results

Conclusion