Abstract
Forming simulations are a cost-effective solution to mitigate process-induced defects. The models developed to simulate the forming process require material property data for the dominant deformation mechanisms: intra-ply shear, bending, and inter-ply friction. These mechanisms are considered independent, and material property data has to be derived from experimental data for each mechanism separately. However, it is known that the material response to the deformation mechanisms is correlated, as the choice of matrix, fibre, and reinforcement influences the response to all mechanisms. Over the past years a large variety of thermoplastic composites have been characterised, covering a broad field of applications in automotive and aerospace industry. This makes it possible to start correlating the forming behaviour of thermoplastic composites. In this study, the effect of the constituents of a composite on the forming behaviour is analysed. To this end, a Bayesian cross-classified multilevel model with varying intercepts was applied, and the effects found by the model were analysed. Correlations were found between the effect of the constituents and their properties. The study confirms that the matrix material is an important indicator for the forming behaviour.
Highlights
Thermoforming of continuous fibre reinforced thermoplastic composite materials has great potential for high volume production of light weight tailored parts, due to the short cycle time
Fixed UD PA6 and varying fibre material CF/GF: the measurements for the glass fibre composite are lower than the carbon fibre composite for all mechanisms
Fixed UD CF and varying matrix polymer PA66/PAEK/PEEK/PEKK: the matrix seems to have a significant effect on the regression means, and on the resistance to deformation, especially for the shear and friction mechanisms
Summary
Thermoforming of continuous fibre reinforced thermoplastic composite materials has great potential for high volume production of light weight tailored parts, due to the short cycle time. Simulation tools have been developed [1] to evaluate the forming process and mitigate the process induced defects prior to actual manufacturing These simulation tools generally model the dominant deformation mechanisms: shear, bending, and slip. Several comparative studies have shown that composites with different types of reinforcement, fibre material, or matrix polymer, the constituents of a composite, behave different [4,5]. It is not known what the influences of these constituents is on the forming behaviour, in other words the balance between mechanisms. This study aims to quantify the effect of the constituents on the different deformation mechanisms
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
