Pure mode I and II interlaminar fracture characterization of carbon-fibre reinforced polyamide composite

Reis, J.P.; Moura, M.F.S.F. de; Moreira, R.D.F.; Silva, F.G.A.

doi:10.1016/j.compositesb.2019.03.069

Cited by 35 publications

(23 citation statements)

References 36 publications

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“…In addition, the low interlaminar adhesion together with the high compliance of the composite in transverse direction may facilitate the micro-buckling of the layers under compression loading. Finally, the non-homogeneous structure of the material in the interlayer does not excessively penalise the fracture toughness in mode I (the toughness is 91% of that obtained by HCM [32]). This may be due to the large number of fibre bridges that are created between the fractured faces.…”

Section: Discussionmentioning

confidence: 88%

“…This may be due to the large number of fibre bridges that are created between the fractured faces. In Mode II, however, it seems that the most effective matrix shearing fracture mode is not activated in the fractured surface, and the fracture toughness is significantly affected (59% of that obtained by HCM [32]).…”

Section: Discussionmentioning

confidence: 91%

“…In order to assess the performance of the printed CCF/PA composite, the mechanical properties obtained in the current work were compared with those of an equivalent (reference) material manufactured by means of Hot Compression Moulding (HCM) [29][30][31][32]. The reference properties are shown in Table 3 along with those characterised in this study.…”

Section: Discussionmentioning

confidence: 99%

“…This outcome is likely be due to the influence of defects induced by the 3D-printing process which ought to have a larger impact on resin dominated properties. [32] The mechanical performance of the printed material depends largely on the quality of the bonding between the printed beads. Two phenomena occur in the bead bonding process: the creation and growth of the contact surface between beads, and the molecular diffusion of the polymer chains into the contact surface.…”

Section: Discussionmentioning

confidence: 99%

“…At interface level, interlaminar resistance and critical energy release rates under mode I and mode II loadings are investigated. In the discussion of the results obtained, these properties are compared to those of an equivalent material manufactured by means of Hot Compression Moulding [29][30][31][32] to assess the performance of this novel FFF process. In addition, the microstructure of the printed material and the thermal history of the material during the process have been studied to identify process-induced defects and measure their impact on the resulting mechanical properties.…”

Section: Introductionmentioning

confidence: 99%

See 4 more Smart Citations

Ply and interlaminar behaviours of 3D printed continuous carbon fibre-reinforced thermoplastic laminates; effects of processing conditions and microstructure

Iragi

Pascual-González

Esnaola

et al. 2019

Additive Manufacturing

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Taking advantage of an extended design and manufacturing space for composites, the technology of Fused Filament Fabrication (FFF) of continuous fibre-reinforced thermoplastics shows great potential for the production of the next generation of lightweight structural parts. This novel process is very much under development, and knowledge of the mechanical behaviour of the resulting 3D-printed materials is still limited. In this work, the intra-and inter-laminar behaviours of carbon fibre/polyamide printed laminates were extensively characterised to determine ply elastic and strength properties, as well as interface strength and fracture characteristics. Moreover, the effects of eventual production defects on these properties were analysed, putting in evidence some of the present shortcomings of the FFF process. Such defects include non-homogeneous fibre distribution, large amounts of intra-and interlaminar voids, and weak interlayer bonding, which are likely to be due to insufficient thermo-mechanical consolidation of the material during the FFF process, and have significant influence on the matrix-dominated mechanical properties. As a result, the transverse and interlaminar properties were found to be lower than those obtained through Hot Compression Moulding of an equivalent material. Besides highlighting possible process improvements, the mechanical characterisation carried out in this work promises a significant

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Section: Discussionmentioning

confidence: 88%

Section: Discussionmentioning

confidence: 91%

Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Ply and interlaminar behaviours of 3D printed continuous carbon fibre-reinforced thermoplastic laminates; effects of processing conditions and microstructure

Iragi

Pascual-González

Esnaola

et al. 2019

Additive Manufacturing

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Interlaminar and translaminar fracture toughness of 3D‐printed continuous fiber reinforced composites: A review and prospect

Xiang,

Cheng,

Wang

et al. 2023

Polymer Composites

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Fracture toughness is a critical parameter in the evaluation of a component's structural integrity and damage tolerance. For 3D‐printed continuous fiber reinforced composites (CFRCs) based on the fused deposition modeling (FDM) technique, the fracture behavior differed from that of composites manufactured by traditional processes due to the presence of voids and interfaces at different scales, receiving significant attention. Recently published research attempted to apply various testing standards (for other materials) to investigate the fracture behavior of 3D‐printed CFRCs. In these results, the fracture toughness of CFRCs was influenced by the manufacturing parameters dependent on structural porosity and interfacial bonding quality. This paper reviewed fracture toughness measurement standards compatible with CFRCs, factors influencing fracture behavior, and methods improving the fracture toughness of CFRCs. Lastly, this review explored limitations in current studies focused on fracture toughness measurement of 3D‐printed CFRCs and future perspectives for the fabrication of 3D‐printed CFRCs with improved fracture toughness.Highlights This review focuses on fracture toughness measurement standards compatible with 3D‐printed continuous fiber reinforced composites (CFRCs). The manufacturing parameters influencing fracture behavior and methods improving fracture toughness were summarized. This review explores limitations in current studies focused on fracture toughness measurement of 3D‐printed CFRCs.

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An experimental analysis of the end-notched flexure composite laminates beams with elastic couplings

Rzeczkowski

2020

Continuum Mech. Thermodyn.

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This paper presents an experimental study of the composite beams with elastic couplings subjected to the end-notched flexure (ENF) test. The object of research were carbon/epoxy composite laminates with specific stacking sequences exhibiting the bending–extension and the bending–twisting couplings. In addition, multidirectional laminates with different delamination interfaces were tested. Influence of elastic coupling phenomena on behavior of laminates subjected to the bending moment as well as on fracture toughness and delamination surfaces after the ENF tests was discussed. All experiments were performed according to the ASTM D7905 Standard. Determination of crack initiation was supported by the acoustic emission technique. Data analysis of the ENF test was performed by using both the direct beam theory and the corrected beam theory. Results obtained by using the classical data reduction schemes were compared with the compliance-based beam method (CBBM). Greater values of the fracture toughness obtained by using the non-standardized methods can be explained by the effect of the fracture process zone which was taken into account in the CBBM calculation scheme. Delamination surfaces of coupled laminates after the ENF tests were investigated by using the scanning electron microscopy. Results revealed that the effect of elastic couplings might influenced on intense bridging phenomena, more extensive fracture process zone and contribution of the mode III in total delamination resistance. Nevertheless, application of the standardized ENF procedure to determination of the fracture toughness of laminates exhibiting elastic couplings is still possible, provided assistance of additional data reduction schemes and techniques or numerical analysis.

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Pure mode I and II interlaminar fracture characterization of carbon-fibre reinforced polyamide composite

Cited by 35 publications

References 36 publications

Ply and interlaminar behaviours of 3D printed continuous carbon fibre-reinforced thermoplastic laminates; effects of processing conditions and microstructure

Ply and interlaminar behaviours of 3D printed continuous carbon fibre-reinforced thermoplastic laminates; effects of processing conditions and microstructure

Interlaminar and translaminar fracture toughness of 3D‐printed continuous fiber reinforced composites: A review and prospect

An experimental analysis of the end-notched flexure composite laminates beams with elastic couplings

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