2018
DOI: 10.3390/ma11040620
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Analysis of CFRP Joints by Means of T-Pull Mechanical Test and Ultrasonic Defects Detection

Abstract: Defects detection within a composite component, with the aim of understanding and predicting its mechanical behavior, is of great importance in the aeronautical field because the irregularities of the composite material could compromise functionality. The aim of this paper is to detect defects by means of non-destructive testing (NDT) on T-pull samples made by carbon fiber reinforced polymers (CFRP) and to evaluate their effect on the mechanical response of the material. Samples, obtained from an industrial st… Show more

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Cited by 14 publications
(6 citation statements)
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“…The use of ultrasound for automated fiber placement has been recently proposed as an alternative to hot gas torch, laser, and infrared heating [ 23 ]. Moreover, ultrasonic wave propagation has the potential for online process monitoring [ 24 , 25 ].…”
Section: Introductionmentioning
confidence: 99%
“…The use of ultrasound for automated fiber placement has been recently proposed as an alternative to hot gas torch, laser, and infrared heating [ 23 ]. Moreover, ultrasonic wave propagation has the potential for online process monitoring [ 24 , 25 ].…”
Section: Introductionmentioning
confidence: 99%
“…The C-scan analysis, performed in transmission mode and reported in Figure 9 , was a 2D image representation where the amplitude of the received ultrasonic wave signal acquired point-by-point on the laminate was used to map the component area [ 28 ]. From the C-scan image, complete delaminations were detected in as-received IR-heated and -dried samples (not shown for brevity) and samples annealed for 1 h (see Figure 9 ).…”
Section: Resultsmentioning
confidence: 99%
“…Minimum radius is required to maintain the continuity and effective load transmission where the rib web curves into flanges, 4,5 leaving a deltoid cavity at the junction (Figure 1B) that is often filled with CFRP prepreg. 6,7 Researchers have created simplified composite T-joint samples and examined them in pull-off test, in which flanges and skin were supported when receiving clamp from the rib web and tensile load. Typically, in an artificial stress field, cracks appear in, or around, the fillet of the deltoid, and subsequently spread in delamination between flange and skin.…”
Section: Introductionmentioning
confidence: 99%
“…T‐joints are commonly adopted in the design of CFRP structure (Figure 1A), in which the perpendicular part of the stiffener (rib web) divides into two flanges that connect to the skin. Minimum radius is required to maintain the continuity and effective load transmission where the rib web curves into flanges, 4,5 leaving a deltoid cavity at the junction (Figure 1B) that is often filled with CFRP prepreg 6,7 . Researchers have created simplified composite T‐joint samples and examined them in pull‐off test, in which flanges and skin were supported when receiving clamp from the rib web and tensile load.…”
Section: Introductionmentioning
confidence: 99%