Comparative investigation of mode I and II fracture toughness of directly cured CFRP and co-cured bonded CFRP joints

Moroni, F.; Pirondi, A.; Pernechele, C.; Gaita, Arturo; Vescovi, Luca

doi:10.1016/j.prostr.2018.06.014

Cited by 3 publications

(2 citation statements)

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“…They observed that the fracture toughness of co‐cured joints was lower than that of the secondary‐bonded joints due to prepreg moisture which was released during the co‐cure joining approach as well as the formation of voids at the interface, thus it affects the interface of an adhesive layer. Moroni et al 19 investigated the co‐bonded and co‐cured joint's fracture toughness under mode 1, mode 2 Loading conditions. The results revealed that CB composite joint has larger fracture toughness compared to co‐cured joint under mode1, mode 2 conditions.…”

Section: Introductionmentioning

confidence: 99%

Shear properties and failure mechanisms of adhesive bonded composite joint: Effect of glass particle reinforcement

Balaji,

Rajesh

2024

Polymer Composites

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High‐performance composite structures and effective joining processes are important for shipbuilding, and aerospace sectors to perform better in challenging situations. The importance of this study is to analyze the effect of glass powder‐modified adhesive and joining techniques such as co‐curing (CC), co‐bonding (CB), and secondary bonding (SB) on flexural, shear, and free vibrational characteristics such as natural frequency and damping factor for glass fiber‐reinforced polymer (GFRP) composites. Results revealed that, compared to SB and CB composite joints, 1 wt.% glass powder‐modified CC composite single lap joints (SLJ) enhanced the shear properties by 103.04% and 111.74%, respectively, due to rougher surface formation in the adhesive layer. As a result, it enhanced the fiber's adhesion to the matrix. On the other hand, CC bonded joints with 1 wt.% of glass powder exhibited the highest flexural strength (85.99 Mpa). The experimental free vibrational analysis showed that 1 wt.% glass powder CC composite had a high natural frequency, whereas higher wt.% glass powder increased the damping properties due to the matrix and fiber interaction. The current research reveals that CC technique with 1 wt.% of glass powder provided a significant improvement to the adhesively bonded composite's mechanical and free vibrational characteristics.Highlights Four distinct wt.% of glass powder were used to prepare the glass powder‐modified adhesive by sonication. SLJ glass fiber‐reinforced polymer composite joints were fabricated through CC, CB, and SB techniques Maximum shear and flexural strength were found at CC SLJ 1 wt.% glass powder. CC SLJ 1 wt.% glass powder enhanced better vibrational behavior. Failure surface analysis was conducted using FE‐SEM images.

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Section: Introductionmentioning

confidence: 99%

Shear properties and failure mechanisms of adhesive bonded composite joint: Effect of glass particle reinforcement

Balaji,

Rajesh

2024

Polymer Composites

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“…Arai et al [ 21 ] embedded nanomodified films in CFRP and reported about 200% higher mode I fracture toughness than for a pure CFRP laminate. Others have also reported higher mode I and mode II interlaminar fracture toughness by using interleaves of different polymeric structures [ 22 , 23 , 24 , 25 , 26 , 27 ]. The development of custom interleaves with intricate heterogeneous structure (veils or sophisticated nanoparticle systems) using higher cost precision fabrication techniques is gaining attention, however, the object of the present study is to investigate whether the same toughening effects can be achieved with existing homogeneous, less expensive off-the-shelf commercial single ply films.…”

Section: Introductionmentioning

confidence: 99%

Experimental Study on the Interlaminar Fracture Properties of Carbon Fibre Reinforced Polymer Composites with a Single Embedded Toughened Film

et al. 2021

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In this study, two types of single polymer films have been inserted in a composite laminate to examine their toughening effects on mechanical properties. The first is a thermoplastic polyurethane (PU) film, and the second is an adhesive epoxy film featuring a polyester net. The laminates were manufactured either using a co-curing (CC) process or a secondary bonding (SB) process used for the epoxy film. Mode I and mode II interlaminar fracture toughness were measured for laminates manufactured by both processes and compared with the corresponding reference laminate toughness. A significant increase in both mode I and mode II toughness resulted when introducing a single PU film, approximately 290% and 50%, respectively. Similarly, the epoxy film improved the interlaminar fracture properties; the CC process produced an increase of 175% for mode II toughness, while the SB adhesive film showed an increase of 75% for mode II toughness.

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Influence of production based surface topography and release agent amount on bonding properties of CFRP

Mund

Lippky

Blass

et al. 2019

Composite Structures

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Comparative investigation of mode I and II fracture toughness of directly cured CFRP and co-cured bonded CFRP joints

Cited by 3 publications

References 0 publications

Shear properties and failure mechanisms of adhesive bonded composite joint: Effect of glass particle reinforcement

Shear properties and failure mechanisms of adhesive bonded composite joint: Effect of glass particle reinforcement

Experimental Study on the Interlaminar Fracture Properties of Carbon Fibre Reinforced Polymer Composites with a Single Embedded Toughened Film

Influence of production based surface topography and release agent amount on bonding properties of CFRP

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