Local damage evaluation of a laminate composite plate using ultrasonic birefringence of shear wave

Rakotonarivo, Sandrine T.; Payan, Cédric; Moysan, Joseph; Hochard, Christian

doi:10.1016/j.compositesb.2018.01.006

Cited by 17 publications

(9 citation statements)

References 22 publications

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“…However, this study's transition zone between the high-velocity zone and the low-velocity zone is very narrow and not obvious. In addition, the shear wave velocity V 12 (90 • ) is lower than V 13 (0 and 180 • ), showing an obvious shear wave birefringence [28,29]. This difference may be due to the interaction between shear waves and typical internal layered structures of SLM samples.…”

Section: Wave Velocity In Different Directionsmentioning

confidence: 91%

Nondestructive measurement of anisotropic elastic constants of selective laser melted 316L based on a tri-mode ultrasonic method

Yuan¹,

Akase²,

Ma³

et al. 2023

Meas. Sci. Technol.

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Selective laser melting (SLM) technology can rapidly form metal parts with complex geometry, but the internal microstructure and material properties are significantly different from those of traditionally manufactured parts, such as obvious anisotropy and inhomogeneity. This paper proposed a tri-mode ultrasonic system to nondestructively measure the anisotropic elastic constants of 316L stainless steel prepared by SLM. Firstly, the quantitative relationship between ultrasonic wave velocities and anisotropic elastic constants was derived for elliptical anisotropic materials. The anisotropic elastic constants and Thomsen anisotropic parameters can be determined by measuring four ultrasonic wave velocities V_11, V_33, V_12, and V_13. Therefore, a tri-mode ultrasonic transducer was designed and fabricated to build the elastic constant ultrasonic measurement system. Then, the elastic constants and Thomsen anisotropic parameters of SLM samples were measured, and the key process parameters’ influence was discussed. The standard static tensile test validated the result of the ultrasonic test, and the maximum relative error was 6.94%. This study will provide a novel nondestructive measurement method and system of anisotropic elastic constants to ensure internal quality and improve the additive manufacturing process.

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Section: Wave Velocity In Different Directionsmentioning

confidence: 91%

Nondestructive measurement of anisotropic elastic constants of selective laser melted 316L based on a tri-mode ultrasonic method

Yuan¹,

Akase²,

Ma³

et al. 2023

Meas. Sci. Technol.

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“…The matrix, reinforcement, and interface are indeed the three essentially key phases that make up GFRP composites [27]. Impact damage, which commonly presents as delamination, matrix cracking, and fiber failure, can significantly diminish structural strength and stability [28][29][30]. Due to the unstable resin and inadequate curing methods, voids and porosities are among the most frequent flaws that develop during the composite preparation.…”

Section: Characterization Of Mechanical Properties and Testingmentioning

confidence: 99%

Enhancement of high-performance structures with sustainable seashell filler-based GFRP composites in static loading

Hosseini

Asokan

2023

Mater. Res. Express

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Research on reinforcing airplane structures while reducing their weight by employing sustainable materials is currently challenging. In this study, damage mechanisms, mechanical characteristics, and failure behavior of laminates made of plain-woven glass fiber/epoxy and Glass Fiber Reinforced Polymer (GFRP) with sea shell filler under low-velocity impact static loading conditions are experimentally investigated. The bi-directional GFRP type E-glass laminates with 10 plies and a total thickness of 3.35mm are created by hand lay-up process using an epoxy matrix. Comparing GFRP with an effective ratio of sea shell filler of 5% under various impact loading, composites are characterized in accordance with ASTM standards to assess the progressive damage and failure of GFRP composite. The findings of the experiment indicate that GFRP with seashell filler composites outperforms GFRP composites in terms of impact strength, outstanding flexural strength, and tensile strength. The findings show that adding seashell filler to GFRP increased the composite's ability to sustain various impact loads. The sample with seashell infill has a drop weight impact that is 25.26% lower than GFRP. Moreover, the flexural test demonstrated a 59.6% increase in bending over GFRP. Seashell filler outperformed GFRP in the longitudinal strength test by 33.12%, according to the results of the tensile test. Finally, the compression after impact test (CAI) manifested a remarkable increase in transverse strength by 78.23%.

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“…The decomposition results make it possible to calculate the reliability and failure mode characteristics according to Equations (41)- (44). Figure 9 shows the fraction of the AE events according to Equation (43) belonging to the four damage modes (D1,…,D4) at different load times. The vertical dotted blue and red lines indicate the time of the peak force (t*) and the upper limit (tAE) of the duration of detecting the signal amplitude and energy respectively.…”

Section: Glass Fiber Reinforced Pp Compositementioning

confidence: 99%

“…Another possibility to locate damages and characterize their geometry is provided by the ultrasonic non-destructive testing method using the analysis of the damage-induced anisotropy based on measuring quasi-static indentation 42 or shear wave birefringence. 43 The accuracy of measuring damage size has also been analyzed using different ultrasonic testing modes. 44…”

Section: Introductionmentioning

confidence: 99%

Novel evaluation method of acoustic emission data based on statistical fiber bundle cells

Vas

Kocsis²,

Czigány

et al. 2019

Journal of Composite Materials

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In general, the aim of acoustic emission (AE) assisted tensile tests of composite materials is to identify and characterize the damage and failure modes of the specimens. This paper presents a fiber-bundle-cells (FBC) based statistical model, which provides a possible solution to the problem of characterizing the mechanical and failure behavior of the material. The model, based on the results of mechanical tests and AE measurements, decomposes the measured AE event number and tensile force-load time processes into components corresponding to the different damage modes. The AE events belonging to different failure modes are described by inhomogeneous Poisson point processes, while failures are modeled with the breakage of fibers as elementary parts of the sample. Hence damage modes can be characterized with the number fraction, and the tensile strength and signal energy distributions of the components. Moreover, the variation of the number fraction of the intact or damaged fibers as a function of the load time can be calculated and depicted as well. As reliability function or a kind of damage map, it reveals the mechanical load-bearing ability of the material tested. The applicability of the model is demonstrated by compact tension testing and the comparison of short and long glass fiber reinforced VERTON PP sheets and injection molded wood fiber reinforced PP composites.With the help of fast Fourier transformation (FFT), the frequency components of the single AE signals can be characterized by the amplitude or power spectrum in the frequency domain. Their description parameters are the bandwidth (B), the mean frequency (fm), the frequency of the maximum amplitude component (fP), and the amplitude (AP) or energy (UP) of the maximum peak. Similar parameters can be obtained from the mean spectra of a series of AE signals, and histograms and/or cross-plots can be calculated from the data of single AE signals. 2,4 Special techniques can provide information in both the time and the frequency domain, resulting in time-dependent spectrum statistics. 2,4 The classic method is the short time FFT (SFFT) technique, which uses a moving time window. In the case of wavelet transformations (WT), AE signals are analyzed with the help of various wavelet components. The signal transformations mentioned above provide additional or in itself usable information about the sources and failure modes in the frequency domain [21][22][23][24][25][26] or both in the time and the frequency domains [27][28][29][30][31][32][33][34][35][36] . In the latter case, wavelet transformations based on Haar 28 or Gabor 27, 33 wavelet components as well as Hilbert-Huang transform 30 can be used to decompose the AE signals and calculate the energy of the components. [27][28][29][30][31][32][33][34][35][36] In the case of thin plates, modal analysis can be applied to study and separate extensional and flexural Lamb waves. 37,38 The finite element method (FEM) can give a good base for wave discrimination. 38 The localization of a single AE signal in the spe...

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Local damage evaluation of a laminate composite plate using ultrasonic birefringence of shear wave

Cited by 17 publications

References 22 publications

Nondestructive measurement of anisotropic elastic constants of selective laser melted 316L based on a tri-mode ultrasonic method

Nondestructive measurement of anisotropic elastic constants of selective laser melted 316L based on a tri-mode ultrasonic method

Enhancement of high-performance structures with sustainable seashell filler-based GFRP composites in static loading

Novel evaluation method of acoustic emission data based on statistical fiber bundle cells

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