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- W2213565478 abstract "The amount of void ratio in mortar significantly affects its engineering properties. The transmission ultrasonic method, such as ultrasonic pulse velocity technology, is commonly used in-situ to evaluate the quality of mortar. In this research, commercial finite element software, LS-DYNA, is employed to simulate the mechanical behavior of ultrasonic waves propagating in mortars with various void ratios. The transient waves usually induced by an impact loading are applied to circular disks meshed with 2-D axisymmetric elements. Three different excitation frequencies, 0.5, 1, and 2.25 MHz, of ultrasonic wave are performed in the numerical analysis. Numerical results show that the ultrasonic pulse velocity decreases from 9.5% to 10% with an increasing void ratio. Excitation frequency has insignificant effect on compressive wave velocity. Ultrasonic reflection loss is related to both void ratio and excitation frequency. A joint effect from void ratio and excitation frequency on ultrasonic reflection loss is developed to predict the reflection loss in mortars." @default.
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- W2213565478 date "2010-01-01" @default.
- W2213565478 modified "2023-09-23" @default.
- W2213565478 title "A Numerical Study on the Reflected Ultrasonic Responses in Harden Mortar with Various Void Ratios" @default.
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