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Materials 2018, 11(12), 2469;

Improving Composite Tensile Properties during Resin Infusion Based on a Computer Vision Flow-Control Approach

Departamento de Ingeniería Mecánica y Minera, Campus Las Lagunillas, Universidad de Jaén, 23071 Jaén, Spain
Author to whom correspondence should be addressed.
Received: 29 October 2018 / Revised: 28 November 2018 / Accepted: 1 December 2018 / Published: 5 December 2018
(This article belongs to the Special Issue Advanced Materials for Transport Applications)
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Liquid composite manufacturing techniques, mainly applied in the transport industry, have been studied and optimized for decades while defect analysis and its minimization have been a goal to increase reliability and mechanical performance. Researchers have found that many process parameters have a strong influence on the mechanical behavior of composite structures where the flow front velocity, closely related to voids, plays a considerable role. In this work, the optimal flow front velocity was evaluated and controlled using a computer vision system for different laminates improving the mechanical tensile properties and void content. Enhanced mechanical tensile properties were found using a feedback flow-controller vision system which was able to keep the optimal flow front velocity constant to reduce the air traps among tows and fibers. Tensile strength was enhanced up to 18% for fiber orientation at 0° and 3.3% at 90°, whereas tensile modulus was increased up to 18.4% for fibers at 0° and 8.7% at 90°. A novel methodology is presented through this work, aiming to improve the robustness of resin film infusion (RFI) processes while ensuring the quality of the composite material. View Full-Text
Keywords: composite; tensile; optimization; automotive; lightweight design composite; tensile; optimization; automotive; lightweight design

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Almazán-Lázaro, J.-A.; López-Alba, E.; Díaz-Garrido, F.-A. Improving Composite Tensile Properties during Resin Infusion Based on a Computer Vision Flow-Control Approach. Materials 2018, 11, 2469.

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