Browsing by Author "Edwards, Michael J."

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    Heat transfer modelling of flashlamp heating for automated tape placement of thermoplastic composites
    (Elsevier, 2021-03-13) Danezis, Anastasios; Williams, David; Edwards, Michael J.; Skordos, Alexandros A.
    Flashlamp systems introduce pulsed and broadband heating to automated tape placement (ATP) offering greater control and optimisation potential. A thorough understanding of the role of operation parameters on the process is necessary to unlock these capabilities. A 2D finite element model of the heat conduction, able to analyse the temperature field evolution in the time scales of short high-energy pulses was developed and combined with ray tracing analysis in this work. The model was validated against experimental data from ATP trials of AS4/PEEK composites. Parametric studies showed that pulse duration and frequency influence significantly both the surface and bulk temperature profiles. Longer pulses lead to higher irradiation temperatures, whilst the profiles converge to the behaviour of a continuous source of equivalent power at high frequency. The versatility of flashlamp heating enhances the processing envelope through expanding the feasible combinations of maximum temperature and depth of penetration achievable in ATP processing
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    Heat transfer modelling of flashlamp heating for automated tape placement of thermoplastic composites
    (Cranfield University, 2021-03-22 15:37) Danezis, Anastasios; Williams, David; Edwards, Michael J.; Skordos, Alex
    Heat transfer model validation: contains the experimental temperature data captured during the manufacture of AS4/PEEK composites and the corresponding model predictions.Irradiance profiles: contains the optical model predictions for the configuration used in the study and the data after the application of smoothing algorithm.Thermal model 2D geo: the geometry of the heat transfer model.Bulk profiles: contains the bulk profiles as predicted by the thermal model for the 25, 50, 100 Hz pulsed cases and continuous operation.