The structural properties of a material can be determined with high accuracy using Resonant Ultrasound Spectroscopy (RUS) measurements coupled with finite element modeling predictions of vibrational modes and an estimated elastic tensor. Vibrational mode frequencies obtained from RUS spectra are used to determine elastic coefficients C11 and C44 through inverse analysis techniques. These elastic coefficients are then used to determine structural properties (Young’s modulus, E; shear modulus,G; and Poisson’s ratio, m) of the material.
The measurement can accommodate small material coupons and direct contact between the transducers and the coupon is required.
PNNL has finite element modeling capabilities to predict the vibrational modes and estimate the elastic tensor of a material, and a resonant ultrasonic spectroscopy (RUS) system to measure resonant vibration frequencies with high-accuracy.
Name: Darrell Herling
Phone: (509) 375-6911
- Biswas, K., Good, M., Roberts, K., Subramanian, M., Hendricks, T., "Thermoelectric and Structural Properties of High-Performance In-Based Skutterudites for High-Temperature Energy Recovery", Journal of Materials Research, vol. 26, 2011.