Fatigue damage evaluation of carbon fiber reinforced composites using nonlinear resonance spectroscopy

Chakrapani, Sunil Kishore; Barnard, Daniel J.

doi:10.1016/j.ndteint.2020.102331

Cited by 5 publications

(1 citation statement)

References 27 publications

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“…As representative nonlinear ultrasonic techniques, the high harmonic method [22][23][24] and non-collinear wave mixing method [25][26][27] are commonly employed. Quantitative damage assessment [28,29], composite materials testing [30,31], and damage localization [32] are hot issues in nonlinear ultrasonic NDT. However, nonlinear signals often come with unavoidable nonlinear interference introduced by external factors.…”

Section: Introductionmentioning

confidence: 99%

Second Harmonic Modulation for Ultrasonic Signals Based on the Design of the Phononic Crystal Filter

Zhu,

Zhao,

Cao

2023

Sensors

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Nonlinear ultrasonic non-destructive testing (NDT) is a widely used method for detecting micro-damages in various materials and structures due to its high sensitivity and directional capability. However, the extraction and modulation of extremely weak nonlinear ultrasonic signals is quite a challenge in practical applications. Therefore, this paper focuses on the second harmonic modulation signal method in nonlinear ultrasonic NDT and proposes the design of the phononic crystal filter (PC filter) to achieve this filtering function. Through finite element simulations, it is demonstrated that the filtering frequency of the filter is influenced by the structural configuration, material wave speed, and geometric characteristics. Then, the design method for cubic PC filters is established. Furthermore, a time-domain finite element method is introduced to verify the filtering ability of the filter and further validate the rationality of this design approach.

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