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Sensors 2019, 19(6), 1310;

Online Monitoring and Prediction of Thermo-Mechanics of AFP Based Thermoplastic Composites

ARC Training Centre for Automated Manufacture of Advanced Composites, School of Mechanical and Manufacturing Engineering, University of New South Wales, Sydney, NSW 2052, Australia
School of Electrical, Computer and Telecommunications Engineering, University of Wollongong, Wollongong, NSW 2522, Australia
Author to whom correspondence should be addressed.
Received: 15 January 2019 / Revised: 25 February 2019 / Accepted: 12 March 2019 / Published: 15 March 2019
(This article belongs to the Special Issue Smart Sensors and Smart Structures)
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Precision sensing in the characterization of complex additive manufacturing processes such as the Automated Fibre Placement (AFP) technique is important since the process involves a significant level of uncertainty in terms of quality and integrity of the manufactured product. These uncertainties can be monitored by embedding optical fibre Bragg grating (FBGs) sensors which provide accurate and simultaneous measurement of strain and temperature during the AFP process. The embedded sensors have been shown to remain resilient in continuous health monitoring after manufacturing. The thermal history obtained from the FBG sensors demonstrates a reduction of temperature on the bottom ply by up to 25% when the plies are laid one above the other. A numerical tool is developed to identify the physical parameters which may be responsible for the rise/fall of the temperature during ply layup. The numerical findings agree well with the sensor data and is extended to capture a breadth of parametric studies through the layup simulation. The model provides a comprehensive insight to the characteristics of the laid and the laying ply from a thermo-mechanics perspective. View Full-Text
Keywords: fibre Bragg grating; automated fibre placement; laminated composites; thermoplastics fibre Bragg grating; automated fibre placement; laminated composites; thermoplastics

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Oromiehie, E.; Chakladar, N.D.; Rajan, G.; Prusty, B.G. Online Monitoring and Prediction of Thermo-Mechanics of AFP Based Thermoplastic Composites. Sensors 2019, 19, 1310.

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