Experimental study on CF/PEEK thermoplastic fastener: Effects of fastener matrix crystallinity and fibre content on the strength of single-lap joint

Yao, Chenxi; Qi, Zhenchao; Chen, Wenliang; Zhang, Chenqun

doi:10.1016/j.compositesb.2021.108737

Cited by 31 publications

(12 citation statements)

References 31 publications

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“…%—CF, 60 vol. %—PEEK–binder) was identified through the literature analysis and the results of the previous studies by the authors [ 45 , 46 , 47 ].…”

Section: Methodsmentioning

confidence: 99%

Surface Modification of Carbon Fibers by Low-Temperature Plasma with Runaway Electrons for Manufacturing PEEK-Based Laminates

et al. 2022

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(1) Background: The paper addresses the effect of carbon fibers (CFs) treatment by low-temperature plasma with runaway electrons on the deformation behavior of the polyetheretherketone (PEEK)-layered composites. (2) Methods: The effect of the interlayer adhesion on the mechanical response of the composites was assessed through the tensile and three-point bending tests. In addition, computer simulations of the three-point bending were carried out with the use of the finite element analysis (FEM) with varying conditions at the “PEEK–CF layers” interface. (3) Results: DRE–plasma treatment during the optimal time of t = 15 min led to formation of a rougher surface and partial desizing of a finishing agent. The shear strength of the layered composites increased by 54%, while the tensile strength and the flexural modulus (at three-point bending) increased by 16% (up to 893 MPa) and by 10% (up to 93 GPa), respectively. (4) Conclusions: The results of the numerical experiments showed that the increase in the stiffness, on the one hand, gave rise to enlarging the flexural modulus; on the other hand, a nonlinear decrease in the strength may occur. For this reason, the intention to maximize the level of the interlayer stiffness can result in lowering the fracture toughness, for example, at manufacturing high-strength composites.

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“…%—CF, 60 vol. %—PEEK–binder) was identified through the literature analysis and the results of the previous studies by the authors [ 45 , 46 , 47 ].…”

Section: Methodsmentioning

confidence: 99%

Surface Modification of Carbon Fibers by Low-Temperature Plasma with Runaway Electrons for Manufacturing PEEK-Based Laminates

et al. 2022

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“…Owing to their superior features, such as high specific strength and stiffness, high specific moduli, damage tolerance, and environmental resilience, carbon-fiber-reinforced thermoplastic (CFRTP) composites have been widely used in the aerospace industry [ 1 , 2 , 3 , 4 , 5 ]. Composite components are divided into numerous parts as per the requirements of structural design, manufacture, and maintenance of composites, as well as the limitations of the integrity molding technology.…”

Section: Introductionmentioning

confidence: 99%

Tests and Numerical Study of Single-Lap Thermoplastic Composite Joints Bolted by Countersunk

et al. 2022

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Tensile tests were carried out to investigate the effect of stacking sequences on the bearing strength of single-lap thermoplastic composite countersunk bolted joints. A 3D elastoplastic model was built based on a plastic theory for numerical analysis. The damage initiation was judged based on LaRC05 criteria, and the damage propagation was described by using a nonlinear, gradual unloading method based on crack band theory. The accuracy of the present model was validated by comparing the numerical results to those from the tests. The test results showed that the effects of stacking sequences on the ultimate bearing strength and the 2% offset bearing strength are limited. Moreover, the numerical results depicted that the ultimate bearing strength and the 2% offset bearing strength reduce when the bolt-tightening torque or the bolt–hole clearance is increased.

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“…The use of metallic fasteners undermine the potential of such assemblies to take advantage of the beneficial specific weight of composite materials. CFRP fasteners have shown great potential for replacing the conventional metallic fasteners in the hybrid bonded/fastened joints configurations [3]- [7]. They can provide with a weight benefit against using metallic fasteners, they are not susceptible to galvanic corrosion and, depending on the fastener design, they can exhibit higher specific strength compared to their metallic counterparts.…”

Section: Introductionmentioning

confidence: 99%

“…Similarly, Fortier et al manufactured and reshaped thermoplastic composite rivets from pultruded rods [6]. Yao et al [7] extend the research to study the effect of matrix crystallinity and fibre content on fastener strength. The thermoplastic composite fasteners in the studies above have demonstrated their potential for applications in the aerospace industry, with the drawback of requiring complicated moulds and a time-consuming process for their application, which raises the production costs.…”

Section: Introductionmentioning

confidence: 99%

3D-printed thermoplastic composite fasteners for single lap joint reinforcement

Guo

Giannopoulos

et al. 2022

Composite Structures

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Experimental study on CF/PEEK thermoplastic fastener: Effects of fastener matrix crystallinity and fibre content on the strength of single-lap joint

Cited by 31 publications

References 31 publications

Surface Modification of Carbon Fibers by Low-Temperature Plasma with Runaway Electrons for Manufacturing PEEK-Based Laminates

Surface Modification of Carbon Fibers by Low-Temperature Plasma with Runaway Electrons for Manufacturing PEEK-Based Laminates

Tests and Numerical Study of Single-Lap Thermoplastic Composite Joints Bolted by Countersunk

3D-printed thermoplastic composite fasteners for single lap joint reinforcement

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