In-process Monitoring of Advanced Composites with a Reusable Thin Film
Conference: Publication Date: 23 July 2019Testing Method:
Composites offer significant structural and aerodynamic advantages to aerospace and automotive vehicles. In addition, there are environmental and cost-saving advantages over traditional metal structures due to reduced fuel consumption and increased service life. One of the main concerns for the composite industry is that current composite manufacturing processes cannot provide fast enough cycle time to match metal alloy processes. Thus, an advanced research work is needed to develop technology that will reduce the timeline required for production and assessment of such materials. One area of concern is the formation of process-induced defects in composite structural parts during various production stages. Another concern is the proper monitoring of the curing cycle of the manufactured part. To
tackle such challenges, a reusable in-situ cure monitoring and assessment system that can predict the formation of manufacturing defects and monitor the degree of cure is developed. Using Lamb waves, initial results indicate that certain characteristics of ultrasound waves have the potential to serve as an index for estimating the degree of cure and level of defects. The proposed system could be used under any curing environment in an autoclave, an oven, or out-of-autoclave process. Off-the-shelf actuators and sensors are be embedded in a reusable thin film material that withstands severe conditions and that temporarily adheres to the manufactured part creating an effective electromechanical coupling between the transducer and the laminate. Experimental and computational results have proved the feasibility of using such a reusable film in cure monitoring and damage detection of complex composite structures.
- Holmes, M., 2019, "Additive manufacturing continues composites market growth", Reinforced Plastics.
- Lindrose, A., 1978, "Ultrasonic wave and moduli changes in a curing epoxy resin", Experimental Mechanics, 18(6), pp 227-232.
- Birt, E. and R. Smith, 2004, "A review of NDE methods for porosity measurement in fibre-reinforced polymer composites", Insight - Non-Destructive Testing and Condition Monitoring, 46(11), pp 681-686.
- Hardis, R., J. Jessop, F. Peters and M. Kessler, 2013, "Cure kinetics characterization and monitoring of an epoxy resin using DSC, Raman spectroscopy, and DEA", Composites Part A: Applied Science and Manufacturing, 49, pp 100-108.
- Nixdorf, K. and G. Busse, 2001, "The dielectric properties of glass-fibre-reinforced epoxy resin during polymerisation", Composites Science and Technology, 61(6), pp 889-894.
- Aggelis, D. and A. Paipetis, 2012, "Monitoring of resin curing and hardening by ultrasound", Construction and Building Materials, 26(1), pp 755-760.
- Lionetto, F. and A. Maffezzoli, 2013, "Monitoring the Cure State of Thermosetting Resins by Ultrasound", Materials, 6(9), pp 3783-3804.
- Hudson, T. and F. Yuan, 2018, "Automated In-Process Cure Monitoring of Composite Laminates Using a Guided Wave-Based System With High-Temperature Piezoelectric Transducers", Journal of Nondestructive Evaluation, Diagnostics and Prognostics of Engineering Systems, 1(2).
- Lamb, H., 1917, "On Waves in an Elastic Plate", Proceedings of the Royal Society A: Mathematical, Physical and Engineering Sciences, 93(648), pp 114-128. 10. Harb, M. and F. Yuan, 2016, "Non-contact ultrasonic technique for Lamb wave characterization in composite plates", Ultrasonics, 64, pp 162-169. 11. Harb, M. and F. Yuan, 2016, "Barely visible impact damage imaging using non-contact air-coupled transducer/laser Doppler vibrometer system", Structural Health Monitoring, 16(6), pp 663-673.
- Le Cahain, Y., J. Noden and S. Hallett, 2014, "Effect of insert material on artificial delamination performance in composite laminates", Journal of Composite Materials, 49(21), pp 2589-2597.
- Deng, X., 1995, "Mechanics of debonding and delamination in composites: Asymptotic studies", Composites Engineering, 5(10-11), pp 1299-1315.
- Vail, J., B. Krick, K. Marchman and W. Sawyer, 2011, "Polytetrafluoroethylene (PTFE) fiber reinforced polyetheretherketone (PEEK) composites", Wear, 270(11-12), pp 737-741.
- Vogelsang, R., R. Brutsch, T. Farr and K. Frohlich, "Electrical tree propagation along barrier-interfaces in epoxy resin", Annual Report Conference on Electrical Insulation and Dielectric Phenomena.
- Coulson, S., I. Woodward, J. Badyal, S. Brewer and C. Willis, 2000, "Super-Repellent Composite Fluoropolymer Surfaces", The Journal of Physical Chemistry B, 104(37), pp 8836-8840.
- Malaeb, R.A., E.N. Mahfoud and M.S. Harb, 2018, “Decomposition of Fundamental Lamb wave Modes in Complex Metal Structures Using COMSOL”, COMSOL Conference Proceedings.
- Gerlich, D. and E. Fisher, 1969, "The high temperature elastic moduli of aluminum", Journal of Physics and Chemistry of Solids, 30(5), pp 1197-1205.
21 Page Views
0 PDF Downloads
0 Facebook Shares