Monitorización de estructuras aeronáuticas mediante técnicas de inteligencia artificial

Alonso, Jaime García

doi:10.20868/upm.thesis.39487

Cited by 2 publications

(1 citation statement)

References 42 publications

(73 reference statements)

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“…The motivation for the research of optical sensors has been mainly focused on SHM, where a sensing system evaluates the structural health of an in-service structure in order to predict damage. The Aerospace Materials and Production Department of the School of Aeronautical and Space Engineering of the UPM has been investigating the application of optical sensors in SHM of aerospace structures for more than two decades, in a series of doctoral theses, research articles and industrial projects [171][172][173][174][175][176][177][178][179][180][181][182][183][184][185]. In this way, key achievements have been addressed, such as the use of FBGs as strain sensors [171], the application of FBG at cryogenic temperatures [172], SHM of large aerostructures with optical and PZT sensors [176], including distributed OTDR sensing [177].…”

Section: Process Monitoring With Fbg Sensorsmentioning

confidence: 99%

Characterization and real-time process monitoring of thermoplastic composites manufacturing processes

Gutiérrez¹

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There is a renewed interest on thermoplastic composites by the aerospace industry. This is mainly due to the main advantages that thermoplastic composites may offer, along with the recent development of promising manufacturing techniques, which are very close to reach the maturity and the production rates that the industry demands. The main advantages that thermoplastic may offer mainly consist of high strength and impact resistance, unlimited shelf life, low water absorption, short processing times and the opportunity of alternative out-of-autoclave (ooA) processing technologies. Some examples of the mentioned promising technologies that are nowadays being improved are compression moulding, induction welding, over-moulding or automated fibre placement (AFP) with in-situ consolidation system (AFP-ISC). AFP-ISC process consists on the automated lamination of thermoplastic tapes which are melted by a heat source and consolidated by a compaction unit over a previously consolidated substrate. The part is quickly cooled down and solidified. In this way, melting and consolidation of the part can be performed in a single step This study aimed to characterize and compare different OoA manufacturing methods with a particular emphasis on laser-assisted AFP-ISC. In addition to that, the present investigation also aimed to develop a real-time process monitoring methodology by means of optical fibre Bragg grating sensors (FBG).

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Section: Process Monitoring With Fbg Sensorsmentioning

confidence: 99%

Characterization and real-time process monitoring of thermoplastic composites manufacturing processes

Gutiérrez¹

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Validation of a ray-tracing-based guided Lamb wave propagation methodology in aerostructures

Sánchez Iglesias,

García Serrano,

Pedraza Rodriguez

et al. 2024

Structural Health Monitoring

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Accurate modeling of guided wave propagation is crucial for structural health monitoring (SHM) systems, where a large amount of information and cases are needed to cover all in-service conditions of a structure. Finite-element models have proven to be accurate enough to simulate the problem; however, they typically require substantial computational resources, and each simulation may require a significant amount of time. This article presents a comprehensive study of a ray-tracing-based wave propagation methodology applied to predict the acoustic behavior of lightweight structures. Focused on composite materials, particularly carbon fiber-reinforced plastic (CFRP), the study addresses the growing need for accurate and fast simulation tools in industries where high-strength lightweight materials play a pivotal role, such as aerospace or automotive. The study presents an examination of the ray tracing method’s effectiveness with series of experimental coupon tests, ranging from a simple metallic plate to a representative CFRP wing lower cover of the Universidad Politécnica de Madrid-LIBIS Unmanned Aerial Vehicle. The investigation spans a distribution of possible damage locations ensuring a comprehensive applicability evaluation. Results demonstrate efficacy in predicting the wave propagation characteristics, including transmission, reflection, and absorption within composite structures, and also an accurate representation of its behavior for in-service damages, both via added masses and real impact damages. The validation involves an in-detail comparison with experimental measurements, evaluating the reliability and applicability of the ray tracing approach. This research not only contributes to the advancement of predictive modeling for acoustic behavior in composite structures but also addresses the broader implications for industries relying on accurate simulations for design optimization and performance evaluation. The validated ray tracing method has proven to be a valuable tool to ensure precise predictions of wave propagation in composite materials, and its computation speed makes the methodology ideal to contribute to a training database for a possible physics-informed machine learning SHM system.

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Monitorización de estructuras aeronáuticas mediante técnicas de inteligencia artificial

Cited by 2 publications

References 42 publications

Characterization and real-time process monitoring of thermoplastic composites manufacturing processes

Characterization and real-time process monitoring of thermoplastic composites manufacturing processes

Validation of a ray-tracing-based guided Lamb wave propagation methodology in aerostructures

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