Cracking Stopping in the Bondline of Adhesively Bonded Composite Adherents by Means of a Mechanical Fastener: Numerical and Experimental Investigation

Baha, S.E.

doi:10.4271/2015-01-2611

Cited by 2 publications

(3 citation statements)

References 4 publications

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“…The material used for the manufacturing of the CFRP panels is the unidirectional prepreg Hexply 8552-IM7(12K)-134-33 % from Hexcel [11]. This is a material used in aerospace applications, which is also used in many scientific publications, therefore many material properties can be found in the literature [2,4,8,11,12]. The film adhesive investigated is EA 9695 050NW AERO, also known as HYSOL EA 9695 .050 PSF NW [13].…”

Section: Methodsmentioning

confidence: 99%

“…Specifications for bonded joints of primary structures in aviation are addressed in AMC 20-29 [3]. According to [2], the only current option to meet the requirements of the aviation authorities is to limit the separation by special design elements, which are referred to as crack-stopper [2,4,5]. The Cracked Lap Shear (CLS) specimen is often used in the investigation of such crack-stoppers.…”

Section: Introductionmentioning

confidence: 99%

“…In [6] the CLS is used for the analysis of fatigue crack growth in bonded joints and advantages in the investigation of crack-stopper elements are mentioned. Studies on different crack-stoppers have been carried out using CLS by [2,4,5]. In [2] the adhesive damage behaviour with crack-stopp elements is simulated.…”

Section: Introductionmentioning

confidence: 99%

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Investigation of the influence of design parameters onto the cracked lap shear specimen

Rose,

Linke,

Busquets

2024

J. Phys.: Conf. Ser.

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The Cracked Lap Shear (CLS) specimen allows a mixed-mode loading condition to be generated without a special test fixture using a simple tensile test. The mixed-mode ratio generated is nearly constant over a wide range of crack growth and is representative of the loading conditions in many structural applications of bonded joints. However, this specimen is not standardised, leading to very dissimilar specimen designs in the literature. In this study, the primary design parameter is the sample width in terms of its application for adhesive characterisation, with a typical layup having a 0° layer in contact with the bond line. The results of quasi-static and fatigue tests using varying specimen widths between 5 mm and 40 mm emphasise the specimen width’s influence. Moreover, CLS specimens with the same layup but without an adhesive layer between the adherends are investigated to study the effects of width scaling without a toughened adhesive bond. While the static tests show a linear relationship between specimen width and joint strength, it is different in fatigue tests, where the crack growth rate increases with decreasing specimen width, both for specimens with and without adhesive bond between the joining partners.

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Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%