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Non/Loosely Contacting NDE Techniques
Published in J. David, N. Cheeke, Fundamentals and Applications of Ultrasonic Waves, 2017
Resonant ultrasound spectroscopy (RUS) is a frequency domain technique in which the set of resonant frequencies of a sample are measured with high precision. By the use of a powerful computer-based analysis, the elastic constants can be determined. The technique has been applied to a wide range of studies in NDE as well as investigations in fundamental solid state physics and geophysics.
PSO-aided fuzzy inference of material elastic constants with resonant ultrasound spectroscopy
Published in Inverse Problems in Science and Engineering, 2021
Kai Yang, Jinbo Liu, Tao Zhu, Hui Wang, Xinxin Zhu
Non-destructive testing (NDT) does no harm to specimens, making on-line detecting possible. So NDT, such as ultrasonic testing [1–4], radiographic testing [5] and eddy current testing [6], shows its great advantage in structural health monitoring and material property determination, especially when health specimens are valuable. As an NDT method, resonant ultrasound spectroscopy (RUS) provides essential resonance frequencies for inversely estimating ECs, since ECs are among the most fundamental data in material science, condensed-matter physics and engineering. The principle that resonance frequencies can be used to inversely estimate ECs is that resonance frequencies of the solid specimen depend on its size, density, elastic moduli and dissipation [7–9], while the size and density can be easily obtained. And ECs of thin films can be also determined with the aid of resonance frequencies [10–11].
Perturbation theories behind thermal mode spectroscopy for high-accuracy measurement of thermal diffusivity of solids
Published in Philosophical Magazine, 2018
The method is analogous to the resonant ultrasound spectroscopy [26–29], which is based on vibrational modes and effective for the measurement of elastic constants of small solids. That is the reason why TMS is expected to be suitable for the measurement of high-thermal diffusivity of small specimens. We [25] actually succeeded in measuring high-thermal diffusivities of such as diamond et al. with various millimetre-size specimens.