The Importance of the Aerospace Sector for Mexico: An Industrial, Social and Educative Perspective

2020 ◽  
pp. 15-26
Author(s):  
Jorge Alfredo Ferrer-Pérez ◽  
Carlos Romo-Fuentes ◽  
Rafael Guadalupe Chávez-Moreno
Keyword(s):  
Aerospace Sector

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

2010 ◽  
Vol 107 ◽  
pp. 15-19 ◽  
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.

A Comparison between International Trade and R&D Collaboration Networks in the European Aerospace Sector

2016 ◽  
pp. 141-171
Author(s):  
Pier Paolo Angelini ◽  
Lucio Biggiero
Keyword(s):  
International Trade ◽  
Wide Spectrum ◽  
Collaboration Network ◽  
Final Conclusion ◽  
Collaboration Networks ◽  
Aerospace Sector ◽  
Problems And Solutions ◽  
Methodological Problems ◽  
The Common ◽  
International Trade Network

Do trading countries also collaborate in R&D? This is the question that, facing with a number of methodological problems, here it is dealt with. Studying and comparing the international trade network and the R&D collaboration network of European countries in the aerospace sector, social network analysis offers a wide spectrum of methods and criteria either to make them comparable or to evaluate its similarity. International trade is a 1-mode directed and valued network, while the EU-subsidized R&D collaboration is an affiliation (2-mode) undirected and unvalued network, and the elementary units of this latter are organizations and not countries. Therefore, to the aim to make these two networks comparable, this paper shows and discusses a number of methodological problems and solutions offered to solve them, and provides a multi-faceted comparison in terms of various statistical and topological indicators. A comparative analysis of the two networks structures is made at aggregate and disaggregate level, and it is shown that the common centralization index is definitively inappropriate and misleading when applied to multi-centered networks like these, and especially to the R&D collaboration network. The final conclusion is that the two networks resemble in some important aspects, but differ in some minor traits. In particular, they are both shaped in a core-periphery structure, and in both cases important countries tend to exchange or collaborate more with marginal countries than between themselves.

scholarly journals Prioritization of R&D projects in the aerospace sector: AHP method with ratings

2010 ◽  
Vol 2 (3) ◽  
pp. 339-348 ◽  
Author(s):  
Amanda C. Simões da Silva ◽  
Mischel Carmen N. Belderrain ◽  
Francisco Carlos M. Pantoja
Keyword(s):  
Ahp Method ◽  
Aerospace Sector

The hydrogen value chain: applying the automotive role model of the hydrogen economy in the aerospace sector to increase performance and reduce costs

2013 ◽  
Vol 88 ◽  
pp. 8-24 ◽  
Author(s):  
Norbert Frischauf ◽  
Beatriz Acosta-Iborra ◽  
Frederik Harskamp ◽  
Pietro Moretto ◽  
Thomas Malkow ◽  
...  
Keyword(s):  
Value Chain ◽  
Role Model ◽  
Hydrogen Economy ◽  
Aerospace Sector

A Numerical Investigation into Residual Stress Characteristics in Laser Deposited Multiple Layer Waspaloy Parts

2011 ◽  
Vol 133 (3) ◽  
Author(s):  
A. M. Kamara ◽  
S. Marimuthu ◽  
L. Li
Keyword(s):  
Residual Stress ◽  
Structural Integrity ◽  
Service Failures ◽  
Number Of Layers ◽  
Multiple Layer ◽  
Combined Use ◽  
Aerospace Sector ◽  
Finite Element Package ◽  
Stress Free State ◽  
Good Agreement

This paper reports an investigation into the residual stress generated with the laser direct metal deposition (LDMD) process and particularly that which arises from the deposition of a multiple-layer wall of Waspaloy on an Inconel 718 substrate. These Ni-based superalloys possess excellent strength and creep resistance at relatively high temperatures. These are attributes contributing to their extensive utilization in various applications in modern industry and particularly in the aerospace sector. Depending on its magnitude and nature (i.e., whether tensile or compressive), the residual stress generated in the combined use of these materials in an LDMD process affect interfacial bonding and structural integrity during the process, and it can also cause unpredicted in-service failures. Prediction of its distribution in the deposited structure is vital toward enhancing process optimization that could lead to its control. Using the ANSYS finite element package, this study investigated the residual stress characteristics in a 6 mm wide and 14 mm high Waspaloy wall that was built from the deposition of 20 layers each consisting of 6 parallel tracks. The predicted results were validated by published experimental data and showed very good agreement. The results indicated that irrespective of the position in the height of the wall, the stress along the length of the wall oscillates about a stress-free state. Along the height of the wall, the stress was found to vary with position. The wall is near stress-free close to the substrate, while, at positions close to the free surface, the stress was uniaxially tensile. The largely tensile stress in the beam scanning direction in the deposited wall increases with number of layers while the stress in the build-up direction in the wall is close to zero.

Inner-Loop Feedback for Deadband Compensation in Electromechanical Flight Surface Actuation Systems

2005 ◽  
Author(s):  
S. R. Habibi ◽  
J. Roach ◽  
G. Luecke
Keyword(s):  
Control Strategy ◽  
Dead Zone ◽  
High Gain ◽  
Velocity Control ◽  
Loop Control ◽  
Aerospace Sector ◽  
Loop Feedback ◽  
Actuation Systems ◽  
Simulated Analysis

This manuscript pertains to the application of an inner-loop control strategy to electro-mechanical flight surface actuation systems. Modular Electro-Mechanical Actuators (EMA) are increasingly used in-lieu of centralized hydraulics for the control of flight surfaces in the aerospace sector. The presence of what is termed as a dead zone in these actuators significantly affects the maneuverability, stability, and the flight profiles of aircrafts that use this actuation concept. The hypothesis of our research is that flight surface actuation systems may be desensitized to the effects of dead zone by using a control strategy with multiple inner-loops. The proposed strategy involves: high-gain inner-loop velocity control of the driving motor; and inner-loop compensation for the differential velocity between the motor versus the aileron. Our results indicate that this strategy is very effective and that it can considerably improve the system’s performance. The above hypothesis is confirmed by theoretical and simulated analysis using the model of an EMA flight surface actuator.

scholarly journals RAISING VALUE AND SUSTAINABILITY AWARENESS FOR CRITICAL MATERIALS: A SERIOUS GAME FOR THE AEROSPACE SECTOR

2020 ◽  
Vol 1 ◽  
pp. 737-746
Author(s):  
G. W. Scurati ◽  
J. W. Nylander ◽  
S. I. Hallstedt ◽  
F. Ferrise ◽  
M. Bertoni
Keyword(s):  
Decision Making ◽  
Serious Game ◽  
Disciplinary Boundaries ◽  
Aerospace Sector ◽  
Critical Materials ◽  
Cost Implications

AbstractAviation strives today to include environmental and social considerations as drivers for decision making in design. This paper proposes a serious game to raise awareness of the value and cost implications of being ‘sustainability compliant’ when developing aerospace sub-systems and components. After describing the development of the game, from needfinding to prototyping and testing, the paper discusses the results from verification activities with practitioners, revealing the ability of the game to raise sustainability awareness and support negotiation across disciplinary boundaries in design.

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