W.J.B. Grouve
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View article: A Functionalized Pyrrole Coating to Improve Fiber–Matrix Adhesion in Carbon Fiber Reinforced Polyphenylene Sulfide Composites
A Functionalized Pyrrole Coating to Improve Fiber–Matrix Adhesion in Carbon Fiber Reinforced Polyphenylene Sulfide Composites Open
The bonding between fiber and matrix has a substantial impact on the mechanical performance of fiber reinforced polymer composites. This paper presents a newly developed pyrrole‐based coating to improve the fiber–matrix adhesion within a c…
View article: Nanosecond pulsed laser transmission welding of cyclic olefin copolymer
Nanosecond pulsed laser transmission welding of cyclic olefin copolymer Open
Laser transmission welding (LTW) is a technique for joining a transparent polymer to an opaque polymer. This paper presents the results of nanosecond pulsed laser (1064 nm) transmission welding of cyclic olefin copolymer (COC). COC has a w…
View article: A press forming benchmark to isolate deformation mechanisms for simulation validation
A press forming benchmark to isolate deformation mechanisms for simulation validation Open
Predictive simulations of the press forming process for thermoplastic composites are invaluable tools for designing tool geometry and determining processing parameters. Ensuring the reliability of these simulations requires thorough valida…
View article: Press forming simulations: Is our characterization hitting the mark?
Press forming simulations: Is our characterization hitting the mark? Open
The accuracy of press forming simulations relies on the quality of the characterization experiments used to determine material parameters. For reliable predictions, the characterization conditions, such as deformations and rates, must repr…
View article: Critical evaluation of torsion rheometry to characterize the anisotropic intraply shear resistance of unidirectional thermoplastic composites in melt
Critical evaluation of torsion rheometry to characterize the anisotropic intraply shear resistance of unidirectional thermoplastic composites in melt Open
View article: Reliable longitudinal electrical conductivity characterisation of unidirectional CFRP tapes
Reliable longitudinal electrical conductivity characterisation of unidirectional CFRP tapes Open
View article: Induction heating of unidirectional C/PAEK – A thermographic study on eddy current formation
Induction heating of unidirectional C/PAEK – A thermographic study on eddy current formation Open
View article: An experimental study on filling of gaps and void pockets during vacuum-bag-only consolidation of fiber placed preforms
An experimental study on filling of gaps and void pockets during vacuum-bag-only consolidation of fiber placed preforms Open
Gaps and void pockets are inevitably present in tailored thermoplastic composite preforms manufactured via automated fiber placement (AFP). Filling these gaps and voids can be challenging during the consolidation due to the high viscosity …
View article: Prediction of the in-plane permeability and air evacuation time of fiber-placed thermoplastic composite preforms with engineered intertape channels
Prediction of the in-plane permeability and air evacuation time of fiber-placed thermoplastic composite preforms with engineered intertape channels Open
The two main void removal mechanisms during vacuum-bag-only (VBO) consolidation of thermoplastic composites are through-thickness diffusion and in-plane air evacuation. The automated fiber placement (AFP) process allows for the creation of…
View article: A mesoscopic model for inter-yarn friction
A mesoscopic model for inter-yarn friction Open
Friction between yarns is a crucial phenomenon in fabric manufacturing processes, and it becomes more complex when using lubrication agents to improve processing. This work presents an experimental investigation of the frictional behaviour…
View article: Dataset with press forming results of unidirectional thermoplastic composite laminates including in-plane deformation data for validation of forming simulations
Dataset with press forming results of unidirectional thermoplastic composite laminates including in-plane deformation data for validation of forming simulations Open
Truncated hemisphere parts were press formed with two commercially available unidirectional thermoplastic composite materials, namely Toray TC1225 and Solvay APC. The width and layup of the laminates were varied to influence the wrinkling …
View article: A state-rate model for the transient wall slip effects in ply-ply friction of UD C/PAEK tapes in melt
A state-rate model for the transient wall slip effects in ply-ply friction of UD C/PAEK tapes in melt Open
Ply-ply slippage is one of the key deformation mechanisms occurring during hot press-forming of thermoplastic composite laminates. Advanced forming simulations, required for defect-free manufacturing, rely on accurate constitutive models f…
View article: Induction Heating of Unidirectional C/Paek – A Thermographic Study on Eddy Current Formation
Induction Heating of Unidirectional C/Paek – A Thermographic Study on Eddy Current Formation Open
View article: Modeling anisotropic friction in triaxial overbraiding simulations
Modeling anisotropic friction in triaxial overbraiding simulations Open
Triaxial overbraiding is a highly intricate textile manufacturing process that involves interlacing yarns in three directions, enhancing reinforcement of the final composite compared to biaxial braids. Predictive process simulation is a co…
View article: Modeling the effect of temperature and pressure on the peak and steady-state ply–ply friction response for UD C/PAEK tapes
Modeling the effect of temperature and pressure on the peak and steady-state ply–ply friction response for UD C/PAEK tapes Open
A proper description of ply-ply friction is essential for the simulation of thermoplastic composite forming processes. The friction response from characterization experiments typically shows a peak followed by a steady-state shear stress. …
View article: Stress analysis of bias extension specimens
Stress analysis of bias extension specimens Open
The Bias Extension test is commonly used for material characterisation in shear, providing essential input to composites forming simulations. Specimens of different sizes are used, with some preference for the minimum length-to-width ratio…
View article: Vacuum-bag-only consolidation of C/PEKK fiber placed preforms with engineered gas evacuation channels
Vacuum-bag-only consolidation of C/PEKK fiber placed preforms with engineered gas evacuation channels Open
Vacuum-bag-only (VBO) consolidation of automated fiber placed (AFP) thermoplastic composites can be a cost-effective processing route for large and complex thermoplastic composite structures. This paper explores the possibility of two-step…
View article: Designer Adhesives for Tough and Durable Interfaces in High‐Performance Ti‐Carbon PEKK Hybrid Joints
Designer Adhesives for Tough and Durable Interfaces in High‐Performance Ti‐Carbon PEKK Hybrid Joints Open
Advanced high‐performance structural applications require the right materials in the right place and suitable interface engineering. However, poor adhesion in harsh environmental conditions frequently challenge material interfaces. An exam…
View article: Microbubble on fiber method to determine the contact angle between steel substrates and highly viscous molten <scp>PEKK</scp> and <scp>PA</scp> 6
Microbubble on fiber method to determine the contact angle between steel substrates and highly viscous molten <span>PEKK</span> and <span>PA</span> 6 Open
Determining the contact angle between a molten thermoplastic and a solid is important for the processing of thermoplastics and their composites. The well‐known sessile drop method can be used to determine the contact angle of thermoplastic…
View article: An experimental study on the role of different void removal mechanisms in VBO processing of advanced thermoplastic composites
An experimental study on the role of different void removal mechanisms in VBO processing of advanced thermoplastic composites Open
The current study is focused on understanding the role of different void removal mechanisms in VBO processing of advanced thermoplastic composites. For this purpose, two commercially available Carbon/Poly-Ether-Ketone-Ketone (C/PEKK) tape …
View article: Modeling of yarn interactions for non-axisymmetric biaxial overbraiding simulations
Modeling of yarn interactions for non-axisymmetric biaxial overbraiding simulations Open
View article: Release Mechanism between Polyimide (Pi) Film and Poly(Ether Ketone Ketone) (Pekk) Thermoplastics: The Modified Boundary Layer Mechanism
Release Mechanism between Polyimide (Pi) Film and Poly(Ether Ketone Ketone) (Pekk) Thermoplastics: The Modified Boundary Layer Mechanism Open
View article: Corrigendum to “Prediction of the peak and steady-state ply–ply friction response for UD C/PAEK tapes” [Compos. Part A: Appl. Sci. Manuf. 163 (2022) 107185]
Corrigendum to “Prediction of the peak and steady-state ply–ply friction response for UD C/PAEK tapes” [Compos. Part A: Appl. Sci. Manuf. 163 (2022) 107185] Open
The authors regret the error in the figure legends of Figs. 10, 12, and 13. The labels for the measured peak ([Formula presented]) and long-time shear stress ([Formula presented]) should be attached to the triangular and circular symbols, …
View article: Prediction of the peak and steady-state ply–ply friction response for UD C/PAEK tapes
Prediction of the peak and steady-state ply–ply friction response for UD C/PAEK tapes Open
Excessive ply–ply friction can lead to process-induced defects during the hot press forming of thermoplastic composite laminates. Process simulations can be used to enable first-time-right defect-free manufacturing. However, a good underst…
View article: Characterization of the water–titanium interaction and its effect on the adhesion of titanium-C/PEKK joints
Characterization of the water–titanium interaction and its effect on the adhesion of titanium-C/PEKK joints Open
This study investigates the mechanisms governing the degradation of co-consolidated titanium-C/PEKK interfaces. Atomic force microscopy was used to demonstrate that the titanium-oxide surface adsorbs moisture. Combined with the diffusion o…
View article: Formability Experiments for Unidirectional Thermoplastic Composites
Formability Experiments for Unidirectional Thermoplastic Composites Open
Reliable composite forming experiments are required to characterize composite formability, to aid material development, and to validate process simulations models. Due to practical reasons, however, typically a limited amount of forming co…
View article: On the Effect of Release Agent and Heating Time on Tool-Ply Friction of Thermoplastic Composite in Melt
On the Effect of Release Agent and Heating Time on Tool-Ply Friction of Thermoplastic Composite in Melt Open
Process simulation software for hot press forming requires accurate material characterizations. One of these characterizations is tool-ply friction, for which the methodology is well established. However, the experimental conditions are of…
View article: In-Plane Shear Characterization of Unidirectional Fiber Reinforced Thermoplastic Tape Using the Bias Extension Method
In-Plane Shear Characterization of Unidirectional Fiber Reinforced Thermoplastic Tape Using the Bias Extension Method Open
Through an improved characterization methodology, this work contributes to better prediction quality in composite forming simulations for unidirectional thermoplastic composites. A better understanding of the forming behavior will aid in t…
View article: The role of process induced polymer morphology on the fracture toughness of titanium–PEKK interfaces
The role of process induced polymer morphology on the fracture toughness of titanium–PEKK interfaces Open
The effect of the degree of crystallinity on the fracture toughness of titanium–PEKK interfaces was investigated experimentally. The level of crystallinity at the interface was varied by employing different processes commonly used in aeros…
View article: The relation between in-plane fiber waviness severity and first ply failure in thermoplastic composite laminates
The relation between in-plane fiber waviness severity and first ply failure in thermoplastic composite laminates Open
The influence of in-plane fiber waviness on the first ply failure of quasi-isotropic thermoplastic composite laminates was investigated. The failure mode and stress at first failure were studied by using a four-point bending test and an en…