Machines for the Aeronautical Industry

Multifunctional composite materials are highly sought-after by the aerospace and aeronautical industry but their performance depends on their ability to sustain various forms of damages, in particular damages due to repeated impacts. In this work we studied the mechanical behavior of a layered glass-epoxy composite with copper inserts subjected to fatigue under repeated impacts with different energy levels. Damage evolution as a function of impact energy was carefully monitored in order to determine the effect of the copper inserts on mechanical characteristics of the multifunctional composite, such as endurance and life. Results of repeated impact tests show that electric current interruption in the copper inserts occurs prior to the total perforation of the composite material, and after about 75% of the total number of impacts to failure. This is the case for the three energy levels considered in this study, [Formula: see text] = 2, 3 and 4 Joules. The epoxy resin was dissolved chemically in order to preserve the mechanical structure of the damaged copper inserts and the composite fibers for further inspection and analysis. Scanning electron microscopy (SEM) of the fractured copper inserts revealed interesting information on the nature of the damage, including information on plastic deformation, strain hardening, cracking mode, temperature increase during the impacts, and most importantly the glass fibers and their roles during the impact-fatigue tests.

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Dependability, Availibility And Safety In The Aeronautical Industry In Brazil

10.4271/931604 ◽

1993 ◽

Author(s):

Edmea Pires de Oliveira Borges

Keyword(s):

Aeronautical Industry

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Low Environmental Impact Machining Processes of Composite Materials Applied to the Aerospace Sector

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.107.15 ◽

2010 ◽

Vol 107 ◽

pp. 15-19 ◽

Cited By ~ 3

Author(s):

Miguel Álvarez ◽

Moisés Batista ◽

Jorge Salguero ◽

Manuel Sánchez-Carrilero ◽

Mariano Marcos Bárcena

Keyword(s):

Evaluation Process ◽

Advanced Materials ◽

Surface Finishing ◽

Matrix Composites ◽

Machining Processes ◽

Tool Materials ◽

Industrial Sectors ◽

Aerospace Sector ◽

Aeronautical Industry

In the last decades, technologically innovative processes performed in advanced materials such as Carbon Fibre (CF) and Metal Matrix Composites (MMC) have continuously increased because of these materials find increasingly applications in the most of the industrial sectors, particularly in aeronautical industry. This is caused by their excellent relationship weight/mechanical properties. Although there is a high trend to apply and develop non-conventional technologies and methods for machining CF and MMC, other common machining processes are commonly applied for working these materials. Thus, in aeronautical industry, mechanical drilling processes are usually applied for preparing the manufactured elements to be assembled. However, drilling of CF based materials can carry on troubles related to a loss of surface finishing quality and/or quick and high tool wear. This work reports on the results about an evaluation process of the surface quality of drilled CF samples as a function of the cutting conditions and the tool materials.

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Modelling the high temperature oxidation of titanium alloys: review of analytical models and development of a new numerical tool PyTiOx

MATEC Web of Conferences ◽

10.1051/matecconf/202032106012 ◽

2020 ◽

Vol 321 ◽

pp. 06012

Author(s):

C. Ciszak ◽

D. Monceau ◽

C. Desgranges

Keyword(s):

Numerical Models ◽

Ecological Impact ◽

Operating Costs ◽

Analytical Models ◽

Temperature Oxidation ◽

Ti Alloys ◽

State Diffusion ◽

First Results ◽

Aeronautical Industry ◽

Numerical Tool

In order to limit the ecological impact of air traffic and its operating costs, the aeronautical industry is looking for improving engines efficiencies and substitutes to high density Ni-based superalloys. Thus, a wider use of Ti-alloys operating at higher temperatures is one of the developed solutions. Being able to predict as accurately as possible the oxidation behavior of Ti-based components at high temperatures appears therefore crucial to improve their sizing and durability. Analytical models based on the solid-state diffusion laws can be found in the litterature. They are fairly accurate in most cases, but they reveal some intrinsic limitations in specific cases such as temperature transients or thin components. Numerical models were later developed to break down these limitations. First results from a new numerical tool called “PyTiOx” (still under development are presented here. They confirm the intrinsic limitations of analytical models. In the case of thin samples, the numerical model predicts an increase of scaling kinetic when metal becomes O-saturated, whereas analytical models do not.

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La influencia de las competencias genéricas en la empleabilidad laboral inicial. Caso de estudio en la UANL.

ENERO-JUNIO 2021 - Revista Innovaciones de Negocios ◽

10.29105/rinn8.16-4 ◽

2017 ◽

Vol 8 (16) ◽

Author(s):

Valeria Paola González Duéñez ◽

Joel Mendoza Gómez

Keyword(s):

Social Interaction ◽

Educational Program ◽

Job Skills ◽

Phase Iii ◽

Study Phase ◽

Generic Competencies ◽

Effect Model ◽

Aeronautical Industry ◽

Competency Based ◽

Teaching Learning

Abstract. Currently the aeronautical industry demand human resource that is highly competitive with excellent abilities, skills and job skills that allow the growth of this industry in Mexico. UANL offers the educational program in Aeronautical Engineering and because is a program designed under the new competency-based education model, it is necessary to measure the employability of students working under this new teaching-learning process, such as is achieved and even provide feedback to continually improve any area of opportunity in the transition of students during their training. This research presents a cause-effect model where independent variables are considered classified generic competencies: instrumentals, social interaction and integrative, and the dependent variable initial workforce readiness. Todefine the variables, objectives and hypotheses we did an analysis of competency-based international models. Variables were operationalized to design and determine the reliability of the measuring instrument performing the content validity with 12 experts on the competency model. To test the hypothesis of educational program were selected 103 students usingPhase I, II and III as field study. Phase I is an assessment of students, Phase II is an evaluation with teachers and Phase III is the opinion of employers. Finally, we present the results of analysis of the direct influence of generic skills: instrumentals, social interaction and integrative and professional-labor performance work called initial workforce readiness.Keywords: employability, generic competencies, initial workforce readinessResumen. Actualmente la industria Aeronáutica demanda recurso humano que sea altamente competitivo con excelentes capacidades, destrezas y aptitudes laborales que permitan el crecimiento de esta industria en México. En la UANL se oferta el programa educativo de Ingeniero en Aeronáutica y por ser un programa diseñado bajo el nuevo modelo educativo basado en competencias, es necesario medir la empleabilidad de los estudiantes que trabajan bajo este nuevo proceso de enseñanza-aprendizaje, de tal forma de que se logre mejorar continuamente e inclusive retroalimentar cualquier área de oportunidad en el tránsito de estudiantes durante su formación. En esta investigación se plantea un modelo causa-efecto en el que se consideran como variables independientes las competencias genéricas clasificadas en: instrumentales, de interacción social e integradoras; y la variable dependiente la empleabilidad laboral inicial. Se realizó un análisis de los modelos internacionales basados en competencias, definiéndose las variables, los objetivos y las hipótesis. Se operacionalizaron las variables para diseñar y determinar la confiabilidad del instrumento de medición realizándose la validez de contenido con 12 expertos sobre el modelo por competencias. Para probar las hipótesis se seleccionaron 103 estudiantes del PE aplicando Fase I, II y III como estudio de campo. La Fase I es una evaluación de estudiantes, la Fase II es evaluación con profesores y la Fase III es la opinión de los empleadores. Finalmente se presentan los resultados del análisis sobre la influencia directa entre las competencias genéricas: instrumentales, de interacción social e integradoras y el desempeño profesional-laboral llamado empleabilidad laboral inicial.Palabras clave: competencias genéricas, empleabilidad, empleabilidad laboral inicial

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Multiaxial Mechanical Strength of AA-2024-T3 Aluminium Alloy Sheets Joined by Friction Stir Welding Processes

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.83-86.1243 ◽

2009 ◽

Vol 83-86 ◽

pp. 1243-1250 ◽

Cited By ~ 1

Author(s):

R.L.L.P. Cerveira ◽

G. F. Batalha

Keyword(s):

Friction Stir Welding ◽

Base Material ◽

Short Review ◽

Multiaxial Loading ◽

Angle Variation ◽

Friction Stir ◽

Aa 2024 ◽

Aeronautical Industry ◽

Welding Processes ◽

Joining Process

The aim is to analyze a junction produced by a Friction Stir Welding (FSW) joining process under multiaxial loading, employing a modified Arcan test that allows an angle variation of the loading in order to evaluate the failure of the FSW weldment as compared to the base material. A short review of the earlier studies and relevant theories about the FSW processes and fracture modes I and II under multiaxial loading are presented and were experimentally evaluated for an AA2024-T3 aluminum alloy sheets (t = 1.6 mm) processed by FSW. The results obtained can serve as a basis to compare the junctions made using FSW and conventional joint methods such as rivets (very common practice in the aeronautical industry).

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Porosity and Inclusion Detection in CFRP by Infrared Thermography

Advances in Optical Technologies ◽

10.1155/2012/765953 ◽

2012 ◽

Vol 2012 ◽

pp. 1-6 ◽

Cited By ~ 6

Author(s):

C. Toscano ◽

C. Meola ◽

M. C. Iorio ◽

G. M. Carlomagno

Keyword(s):

Infrared Thermography ◽

Production Costs ◽

Non Destructive Testing ◽

Destructive Testing ◽

Evaluation Methodologies ◽

Slag Inclusions ◽

Aeronautical Industry ◽

Testing Techniques ◽

Lock In ◽

Non Destructive

The ever wide use of composite materials in the aeronautical industry has evidenced the need for development of ever more effective nondestructive evaluation methodologies in order to reduce rejected parts and to optimize production costs. Infrared thermography has been recently enclosed amongst the standardized non destructive testing techniques, but its usefulness needs still complete assessment since it can be employed in several different arrangements and for many purposes. In this work, the possibility to detect slag inclusions and porosity is analyzed with both lock-in themography and pulse thermography in the transmission mode. To this end, carbon-fiber-peinforced polymers different specimens are specifically fabricated of several different stacking sequences and with embedded slag inclusions and porosity percentages. As main results, both of the techniques are found definitely able to reveal the presence of the defects above mentioned. Moreover, these techniques could be considered complementary in order to better characterize the nature of the detected defects.

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