Damage detection by double-sided ultrasonic assessment in low-velocity impacted CFRP plates

Sadeghi, M.Z.; Nienheysen, Philipp; Arslan, S.; Dafnis, Athanasios; Marció, Bruno Silva; Schmitt, Robert

doi:10.1016/j.compstruct.2018.10.025

Cited by 20 publications

(10 citation statements)

References 13 publications

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“…In light of design industry developments, the use of composites in a variety of structures has been of great interest in recent decades. The advantages of composites over other materials include low weight, high elasticity, proper ductility, and high flexibility, representing an ideal material for various industries 1–3 . However, composite structures have a variety of drawbacks, including heterogeneity, high‐moisture absorption, low‐heat resistance, low‐abrasion resistance, and low‐impact loading strength 4–6 .…”

Section: Introductionmentioning

confidence: 99%

Numerical and experimental investigation of fiber metal laminates with elastomeric layers under low‐velocity impact

et al. 2022

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This study aims to investigate the effects of elastomers on fiber metal laminates (FMLs) subjected to low‐velocity impact loads. A compounded natural rubber layer was added to conventional FMLs containing glass/epoxy composite plies and Al 6061‐T6 layers, measuring its effect on the behavior of the structure in low‐velocity indentation at energy levels of 25 and 45 J. It was found that the addition of an elastomeric layer to the back face of the composite layer increased structural toughness, pre‐fracture deformation, and specific energy absorption while reducing damage and the maximum load. Moreover, positioning the elastomer at a closer distance to the frontal face reduced maximum load and energy absorption capacity. Then, the standard material characterization of tensile, shear, and compressive were performed via the universal testing machine and the split Hopkinson pressure bar apparatus. A numerical model was developed based on the advanced finite element code of LS‐DYNA, and the results were validated by comparison to the experimental data.

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Section: Introductionmentioning

confidence: 99%

Numerical and experimental investigation of fiber metal laminates with elastomeric layers under low‐velocity impact

et al. 2022

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“…Caminero et al [9] analyzed the ability of PAUT to recognize and assess non-visible artificial inclusions and damages in composite laminates; they drew the conclusion that the use of PAUT to assess internal damage is appropriate and advantageous, which can explain the complexity of impact events in different composites. Sadeghi et al [19] proposed a double-side methodology to perform reliable damage/depth detection on CFRP plates under low-velocity impact with PAUT; they suggested that the damage dimensions grow both horizontally and vertically with increasing impact energy. The mentioned studies primarily discussed the detection of damage area, however, the extension shape of internal damage was rarely investigated carefully.…”

Section: Introductionmentioning

confidence: 99%

“…Quasi-static indentation [28] and drop-weight impact [29] are two commonly used method to inflict damage into a specimen. Both of them are widely used to measure damage resistance properties or residual strength properties in recent years [19,25,[30][31][32]. In the present study, drop-weight impact tests were performed to induce BVIDs into the composite specimens, and phased array ultrasonic testing was adopted to inspect the specimens subjected to low velocity impact.…”

Section: Introductionmentioning

confidence: 99%

Experimental Investigation of Impactor Diameter Effect on Low-Velocity Impact Response of CFRP Laminates in a Drop-Weight Impact Event

Cao

Jiang

et al. 2020

Materials

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The present study delved into the effect of impactor diameter on low velocity impact response and damage characteristics of CFRP. Moreover, the phased array ultrasonic technique (PAUT) was adopted to identify the impact damages based on double-sided scanning. Low-velocity impact tests were carried out using three hemispherical impactors with different diameters. The relationship of impact response and impactor diameters was analyzed by ultrasonic C-scans and S-scans, combined with impact response parameters. Subsequently, the damage characteristics were assessed in terms of dent depth, delamination area and extension shape via the thickness, and the relationships between absorbed energy, impactor displacement, dent depth and delamination area were elucidated. As revealed from experiment results, double-sided PAUT is capable of representing the internal damage characteristics more accurately. Moreover, the impactor diameter slightly affects the impact response under small impact energy, whereas it significantly affects the impact response under large impact energy.

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“…To date, the most commonly used NDT methods for inspection of CRFP material are ultrasonic testing [2], [3], infrared thermography [4], [5], X-ray [6]- [8] and acoustic emission [9], [10] etc., but all of them have their limitations for NDT of CFRP structure in view of both high accuracy and efficiency. Recently the high frequency eddy current testing (ECT) method is developed for application to inspection and quantitative evaluation of defects in CFRP materials [11]- [20].…”

Section: Introductionmentioning

confidence: 99%

A Fast Forward Simulation Scheme for Eddy Current Testing of Crack in a Structure of Carbon Fiber Reinforced Polymer Laminate

Xie

et al. 2019

IEEE Access

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High frequency Eddy Current Testing (ECT) is one of the key non-destructive testing techniques for ensuring integrity of a structure of Carbon Fiber Reinforced Polymer (CFRP) material. An efficient numerical simulator is indispensable to enhance the performance of quantitative ECT for CFRP structures from both point of view of probe optimization and defect sizing. In this paper, a fast forward simulation scheme based on the A-φ formulation and databases approach is proposed, implemented and experimentally validated for the rapid and high precision simulation of ECT signals due to defects in a CFRP plate by updating an FEM-BEM hybrid code for ECT problem. Comparison of numerical results of the present method with those of the conventional full FEM-BEM code and the experimental results for artificial cracks in CFRP laminate plates indicates that the proposed novel fast forward scheme can predict ECT signals over 300 times faster but without worsening numerical accuracy, which enables it to be applied to efficient reconstruction of cracks in CFRP plates and for probe optimization.INDEX TERMS CFRP, ECT, experimental validation, fast forward numerical scheme, finite element method.

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Damage detection by double-sided ultrasonic assessment in low-velocity impacted CFRP plates

Cited by 20 publications

References 13 publications

Numerical and experimental investigation of fiber metal laminates with elastomeric layers under low‐velocity impact

Numerical and experimental investigation of fiber metal laminates with elastomeric layers under low‐velocity impact

Experimental Investigation of Impactor Diameter Effect on Low-Velocity Impact Response of CFRP Laminates in a Drop-Weight Impact Event

A Fast Forward Simulation Scheme for Eddy Current Testing of Crack in a Structure of Carbon Fiber Reinforced Polymer Laminate

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