Impact Damage Detection in Laminate and Honeycomb CFRPs using Lamb Wave Ultrasonic Sensing

Abstract

The paper presents the results on application of Lamb waves based technique for impact damage detection and severity identification. The PZT network operates in the round-robin mode changing the actuator and sensor roles of the transducers in order to detect the response of the system in the presence of damage. The monitoring is performed via the analysis of three parameters: change of the amplitude (dA), change of the energy (dP) and cross-correlation (NCC) of the signals in baseline and damaged state. Testing of laminate CFRPs shows that the damage location is estimated with an error of 5–15 mm, while the computed Damage index is linearly dependent on the applied impact energy. For honeycomb CFRPs the NCC parameter do not provide accurate results, however, other parameters allow identification within the 5–20 mm error and reflect accurate data on the severity of the damage.

Influence of a Flat Polyimide Inlay on the Propagation of Guided Ultrasonic Waves in a Narrow GFRP-Specimen

“…Since these delaminations are typically at least within the size range of the considered wavelength, only linear wave propagation is analyzed here. The influence of delaminations and impact damage on linear wave propagation has been intensely investigated over the years [ 5 , 6 , 15 , 18 , 19 , 20 , 21 ]. It is shown that the scattered and converted mode amplitudes depend on the fiber orientation, the delamination size as well as the relative position along the laminate’s height [ 6 ].…”

Numerical and Experimental Research on Non-Reference Damage Localization Based on the Improved Two-Arrival-Time Difference Method

“…Furthermore, they then studied the feasibility of a piezoelectric diaphragm instead of piezoelectric ceramic and compared the effect of temperature variation on both sensors [ 3 ]. The variations in the amplitude, energy and cross-correlation of signals in health and damage states was researched by Burkov et al [ 4 ]. Furthermore, the severity of the damage was obtained.…”

Лагранжев Формализм Для Анализа Акустических Свойств Двухфазных Композитных Материалов С Дефектными Межфазными Границами

“…Связанной с ней задачей является неразрушающая диагностика фазового состава и повреж денности образцов и элементов структур различного назначения из композитных материалов, что крайне важно в контексте создания цифровых двойников конечных изделий. Для решения этих проблем развиваются различные неразрушающие методы, в том числе основанные на анализе скоростей и дисперсии упругих волн [1][2][3][4][5][6]. Развитие таких методов базируется на построении математического формализма, позволяющего связывать интегральные упругие характеристики композитного материала, MECHANICS OF COMPOSITE MATERIALS.-2022.-Vol.…”