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Mechanical and Materials Engineering Articles

Our index of selected Mechanical and Materials Engineering articles

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Study of external air flow for an AURORA

From: Aircraft Engineering and Aerospace Technology, volume: 83 issue: 5, 2011
Even though satellites, balloons and aircrafts have served admirably as aerospace platforms for remote sensing and telecommunication, requirements for new kind of platforms have been widely discussed. In this regard, robotic unmanned aerial vehicles have enormous potential for a wide range of applications. This article discusses some of the experimental and numerical studies undertaken to identify the optimal position of an airship with reference to spatial variation of atmospheric wind-flow direction, so as to reduce the vibrations caused by atmospheric wind. This is crucial for the development of control mechanisms for autonomous unmanned remote monitoring robotic airships.

Foreign object debris surveillance network for runway security

From: Aircraft Engineering and Aerospace Technology, volume: 83 issue: 4, 2011
Foreign object debris (FOD) poses a significant hazard to aviation safety and brings huge economic losses to the aerospace industry due to aircraft damage and out-of-service delays. Different schemes and sensors have been utilized for FOD detection. This paper aims to look into a video-based FOD detection system for airport runway security and propose a scheme for FOD surveillance network establishment.

Assembly and Automation Expo highlights innovations in automated assembly

From: Assembly Automation, volume: 31 issue: 3, 2011
This paper reviews the Assembly and Automation Expo. In-depth interviews with exhibitors show that new products to be assembled are driving those who provide automated assembly systems to create better solutions. These include solutions that are more cost-effective, faster and include more quality assessment and tracking as part of the automation.

Predicting the fatigue life of pristine and pre-corroded friction stir welded joints

From: International Journal of Structural Integrity , volume: 2 issue: 2, 2011
Friction stir welding (FSW) is a simple, clean and cost-effective joining technology which allows high-quality joining of materials that have been traditionally troublesome to weld conventionally without distortion, cracks or voids. Since FSW has been identified as "key technology" for primary aerospace structures, the recent FAR regulations for damage tolerance and fatigue evaluations of aircraft structures require fatigue life predictions for this specific joint type also in the presence of corrosion. The purpose of this paper is to give an overview of the prediction of small coupon fatigue lives of thin section friction stir welded butt and T-joints.

Prediction of strength of reinforced lightweight soil using an artificial neural network

From: Engineering Computations, volume: 28 issue: 5, 2011
Reinforced lightweight soil (RLS) is usually composed of dredged soil, cement, lightweight material such as air-foam, and reinforcing elements such as waste fishing net, strips, fibres, and grids. RLS is considered to be environmentally friendly because it provides a means to recycle both dredged soil and waste fishing net. But, as the strength of RLS is strongly influenced by the mixing ratio of each admixture, it is difficult to formulate a mathematical relationship between the strength and the admixture content of the composite materials. As a result, in order to expedite the field application of RLS, an appropriate prediction method is needed. The paper aims to address this issue.

A multi-level adaptive solution strategy for 3D inverse problems in pool boiling

From: International Journal of Numerical Methods for Heat & Fluid Flow, volume: 21 issue: 5
Despite the enormous research effort in the past decades, the mechanistic understanding of boiling phenomena is still not yet well developed. Existing design methods are based on correlations which are only valid for one of the boiling regimes. This paper presents an efficient algorithm based on a multi-level adaptive mesh refinement strategy for the solution of ill-posed inverse heat conduction problems arising in pool boiling using few temperature observations.

RFID adoption: a systems thinking perspective through profitability engagement

From: Assembly Automation, volume: 31 issue: 2, 2011
Among the problems facing management of organizations in acceptance and implementation of radio frequency identification (RFID), costs, failure rates, interference, security, and privacy issues are the most important. For those early adopters, their initial costs will be much higher than those who have taken a wait and see approach. Yet, those who wait run the risk of being pre-empted and losing market share.

Guidance algorithms for proximity to target spacecraft

From: Aircraft Engineering and Aerospace Technology, volume: 83 issue: 1, 2011
Recent decades have witnessed the prosperity and maturity of space technology, and the problem of space rendezvous, especially with uncooperative spacecraft, has received much attention by several researchers. This paper addresses the guidance problem for autonomous proximity manoeuvres of a chase-spacecraft approaching a target spacecraft.

Corrosion behaviour of concrete modified with waste tyre

From: Anti-Corrosion Methods and Materials, volume: 58 issue: 2 pp76-83, 2011
From 1990s onwards, discarded tyres have had a high profile as a waste disposal problem, and stockpiles are produced with a potential for environmental damage. In this paper, the authors investigate the application of rubber in concrete as a useful solution to meet the challenge associated with disposal problems of waste tyres and to improve the durability and corrosion resistance of steel-reinforced concrete.

Technical textiles as a new route to enhance orthopedic casts' properties

From: International Journal of Clothing Science and Technology, volume: 23 issue: 1 pp25-33, 2011
The casts sector is an important sector for orthopaedic textile products. Plaster and plastics casts are widely used in hospitals, pharmacies and health-care centres, but they are heavy, not washable and do not offer a suitable fixation for bone fractures (e.g. hand wrist), especially when operated under different swelling conditions. After decreasing of the swelling, the cast is in a hard form and the stabilization effect of the cast is insufficient due to the occurring of distance between the skin and the cast. The purpose of this paper is to develop a new pneumatic cast that depends on Polyvinylchlorid coated fabric as an outer layer, skin friendly internal layers, an air chamber, and metal braces.