研究目的
To understand and control the temperature distribution within the laminate during the laser-assisted tape winding process to ensure reliable and high-quality manufacturing of thermoplastic composite pipes.
研究成果
The study confirmed the through-thickness heating of subjacent tapes and the connection of composite laminate and liner. It highlighted the short time available for intermolecular diffusion processes affecting the bonding strength of the laminate. The comparison of experimental data with numerical model predictions showed good agreement, enhancing the model's accuracy and its capability for model-based control of the laser-assisted tape winding process.
研究不足
The study focused on a specific setup for manufacturing thermoplastic composite pipes and may not be directly applicable to other manufacturing processes or materials. The accuracy of temperature measurements could be affected by the placement of thermocouples and the measurement principles of the devices used.
1：Experimental Design and Method Selection:
The study focused on the through-thickness temperature distribution in an unbonded flexible pipe setup with sensor placement in between subsequent plies. Thermocouples were embedded between layers to capture the temperature distribution during the manufacturing of pipe samples.
2：Sample Selection and Data Sources:
Pipe samples with five layers wound on a pure thermoplastic liner were manufactured. Thermocouples were placed on the substrate of each layer with a radial offset of 180° in the axial middle of the pipe samples.
3：List of Experimental Equipment and Materials:
K-type thermocouples of the Omega 5TC series, a Graphtec GL220 data logger, and a Pyroview 160L compact+ infrared thermographic camera were used. The tape material was HT carbon fiber-reinforced polyamide-12 (PA12) from Evonik.
4：Experimental Procedures and Operational Workflow:
The winding was performed discontinuously, allowing for thermocouple fixation before the beginning of a new layer. Temperature data were continuously recorded during the experiments.
5：Data Analysis Methods:
The temperature data obtained from the thermocouples and the infrared thermographic camera were analyzed to evaluate the through-thickness temperature distribution and its reflection of the temperature input on the surface.
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