Care and Repair of Advanced Composites

2020 ◽  
Author(s):  
Eric Chesmar ◽  
◽  
William Cole ◽  
Francois Museux ◽  
Keith B Armstrong ◽  
...  
Keyword(s):  
Airline Industry ◽  
Technical Information ◽  
Lead Author ◽  
Active Member ◽  
Composite Repair ◽  
Elite Group ◽  
Advanced Composites ◽  
Design Engineers ◽  
Wide Range ◽  
United Airlines

The new edition of the well known Care and Repair of Advanced Composites, 3rd Edition, improves on the usefulness of this practical guide geared towards the aerospace industry. Keith B. Armstrong, the original lead author of the first edition was still in charge of this project, counting on the expert support of Eric Chesmar, senior composites specialist at United Airlines. Mr. Chesmar is also an active member of SAE International's CACRC (Commercial Aircraft Composite Repair Committee), an elite group of industry experts dedicated to the standardization, safety, security, and efficiency of composite repairs in the airline industry. Mr. Francois Museux (Airbus) and Mr. William F. Cole II also contributed. Care and Repair of Advanced Composites, 3rd Edition, presents a fully updated approach to the training syllabus recommended for repair design engineers and composite repair mechanics. Metal bonding has been included partly because the defi nition of "composite" can be interpreted to include metal-skinned honeycomb panels, and partly because some composite parts have metal fi ttings or reinforcements that must be treated before bonding. This third edition also covers a number of the problems experienced in service, some of which may be applicable to metallic sandwich panels, offers suggestions for design improvements, including repair design as a particular topic, and regulatory changes. Care and Repair of Advanced Composites, 3rd Edition, provides solid technical information and training for a wide range of airline staff.

scholarly journals Two-Dimensional Numerical Modeling of Flow in Physical Models of Rock Vane and Bendway Weir Configurations

Water ◽  
2021 ◽  
Vol 13 (4) ◽  
pp. 458
Author(s):  
Drew C. Baird ◽  
Benjamin Abban ◽  
S. Michael Scurlock ◽  
Steven B. Abt ◽  
Christopher I. Thornton
Keyword(s):  
Numerical Modeling ◽  
Physical Model ◽  
Numerical Models ◽  
Hydraulic Performance ◽  
Physical Models ◽  
Protection Measures ◽  
Design Engineers ◽  
Model Study ◽  
Study Results ◽  
Wide Range

While there are a wide range of design recommendations for using rock vanes and bendway weirs as streambank protection measures, no comprehensive, standard approach is currently available for design engineers to evaluate their hydraulic performance before construction. This study investigates using 2D numerical modeling as an option for predicting the hydraulic performance of rock vane and bendway weir structure designs for streambank protection. We used the Sedimentation and River Hydraulics (SRH)-2D depth-averaged numerical model to simulate flows around rock vane and bendway weir installations that were previously examined as part of a physical model study and that had water surface elevation and velocity observations. Overall, SRH-2D predicted the same general flow patterns as the physical model, but over- and underpredicted the flow velocity in some areas. These over- and underpredictions could be primarily attributed to the assumption of negligible vertical velocities. Nonetheless, the point differences between the predicted and observed velocities generally ranged from 15 to 25%, with some exceptions. The results showed that 2D numerical models could provide adequate insight into the hydraulic performance of rock vanes and bendway weirs. Accordingly, design guidance and implications of the study results are presented for design engineers.

Qatar Airways: building a global brand

2020 ◽  
Vol ahead-of-print (ahead-of-print) ◽  
Author(s):  
Abdulla Hamad MA Fetais ◽  
Osama Sam Al-Kwifi ◽  
Zafar U Ahmed ◽  
Dang Khoa Tran
Keyword(s):  
Airline Industry ◽  
Study Data ◽  
Aviation Industry ◽  
Consumer Experience ◽  
Content Type ◽  
Secondary Sources ◽  
Global Brand ◽  
Wide Range ◽  
Consumer Orientation ◽  
Internationalization Strategies

PurposeIn 2017, Qatar Airways was recognized as the world's number-one airline by SKYTRAX World Airline Awards. These international awards have been described as “the Oscars of the aviation industry,” reflecting global recognition and excellence in conducting business activities at the international level. The main purpose of this case-based research is to explore and evaluate the internationalization strategies employed by Qatar Airways in becoming known as one of the best airlines in the world.Design/methodology/approachIn accordance with the nature of this study, data were collected by interviewing managers from Qatar Airways as well as by exploiting supporting materials from secondary sources and airline-specific records. The recorded interviews were analyzed via content analysis to define airline strategies aimed at expanding globally and building a global brand.FindingsThe findings reveal that Qatar Airways has adopted effective strategies that have facilitated its aggressive global expansion and enhanced its global consumer recognition – mainly as a fast-growing network connecting important destinations that maintains a focused consumer orientation dedicated to providing an optimal travel experience. These strategies have been focused on building a superior consumer experience marked by exceptional comfort.Practical implicationsQatar Airways' implementation of internationalization strategies in the airline industry represents an innovative approach marked by efficient operations and high-quality standards. Both international business managers and academics can learn from these strategies and their implications for enhancing airlines' global reputation and overall quality performance.Originality/valueUnlike other research studies that investigate a wide range of firms across industries, this study focuses on exploring the factors that support the successful internationalization of a single firm, thus providing in-depth understanding of specific strategies to achieve global recognition. This study provides unique insights to analyze strategies and assess their practical relevance.

scholarly journals Are Agencies Turning a Blind Eye to Public Access to Environmental Assessment Information?

2015 ◽  
Vol 17 (03) ◽  
pp. 1550028 ◽  
Author(s):  
Lisa Friederike Odparlik
Keyword(s):  
Public Participation ◽  
Environmental Assessment ◽  
Planning Process ◽  
Technical Information ◽  
Information Provision ◽  
Public Access ◽  
Planning Theory ◽  
Environmental Assessments ◽  
Electricity Grid ◽  
Wide Range

For environmental assessments (strategic environmental assessment (SEA) and environmental impact assessment (EIA)) a wide range of data and documents is gathered, processed, and produced. In planning theory, this information is viewed to have a transformative function: It can affect perceptions in advance of a decision, thereby impacting the planning process at all levels and stages. The role of this information in supporting transparent public participation is often neglected. This paper analyses the current implementation of legal requirements providing access to information on environmental assessments (EAs) in Germany's electricity grid expansion and federal road planning sectors, using a criteria based case study analysis of agency websites. The 92 analysed websites primarily provide general planning information, technical information, and final decisions. One third of the websites provided EA documents, and show a clear need for improvement in information provision about and in support of public participation.

scholarly journals Meghnad Saha, 1893-1956

1960 ◽  
Vol 5 ◽  
pp. 216-236 ◽  
Keyword(s):  
Nuclear Physics ◽  
Direct Consequence ◽  
Stellar Atmospheres ◽  
Thermal Ionization ◽  
Active Member ◽  
Radio Waves ◽  
Indian Government ◽  
Stellar Spectra ◽  
National Planning ◽  
Wide Range

The name of Professor Meghnad Saha would always remain associated with the theory of thermal ionization and its application to the interpretation of stellar spectra in terms of the physical conditions prevailing in the stellar atmospheres. The theory had all the simplicity and inevitableness which usually characterize a fundamental and epochal contribution. It was almost a direct consequence of the recognition that the laws of thermodynamics and the kinetic theory of gases can be extended to a gas of free electrons. Apart from astrophysics, the theory later found numerous other important applications, such as, to mention some of them, in the study of the ionosphere, conductivity of flames, electric arcs and explosion phenomena. Saha’s researches in astrophysics and physics extended over a wide range of subjects. At one time or the other he worked on stellar spectra, thermal ionization, selective radiation pressure, spectroscopy, molecular dissociation, propagation of radio waves in the ionosphere, solar corona, radio emission from the sun, beta radioactivity, and the age of the rocks. Besides physics he took a keen interest, at times almost bordering on the professional, in ancient history and archaeology. He was a devoted and inspiring teacher, and he gave his time generously to his students. He organized active schools of research at Allahabad and Calcutta; and in establishing the Institute of Nuclear Physics at Calcutta, in building the laboratories of the Indian Association for the Cultivation of Science, and in founding academies of sciences in India, his role throughout was of the utmost importance. He, more than anyone else, was responsible in starting the monthly journal Science and Culture , and he was its editor for many years. He was from the beginning a member of the Council of Scientific and Industrial Research constituted by the Indian Government in 1942, and member (or chairman) of several of the research and other committees of the Council. He was the Chairman of the Council’s Indian Calendar Reform Committee. He was an elected independent member of the Indian Parliament. He took the keenest interest in problems of national planning, particularly in relation to science and industry. He was an active member of the National Planning Committee appointed by the Indian National Congress in 1938 with Jawaharlal Nehru as chairman. In his criticism of things and men, Saha was fearless and trenchant, and he was motivated by a deep earnestness and sincerely, though often tenaciously, held convictions. His memory and versatility were amazing. He was extremely simple, almost austere, in his habits and personal needs. Outwardly, he sometimes gave the impression of being remote, matter of fact, and even harsh, but once the outer shell was broken, one invariably found in him a person of extreme warmth, deep humanity, sympathy and understanding; and though almost altogether unmindful of his own personal comforts, he was extremely solicitous in the case of others. It was not in his nature to placate others. He was a man of undaunted spirit, resolute determination, untiring energy and dedication. On 16 February 1956, on his way to the Office of the Planning Commission in New Delhi, he succumbed to a sudden heart-attack (some hundred yards from the Office of the Commission) and at the age of sixty-two, a career superb in science and great in its promotion and dissemination was tragically closed.

INCOR 18 and 21

Alloy Digest ◽  
1981 ◽  
Vol 30 (8) ◽  
Keyword(s):  
Physical Properties ◽  
Tensile Properties ◽  
Permanent Magnets ◽  
Electronic Devices ◽  
Design Engineers ◽  
Wide Range ◽  
Lower Size

Abstract INCOR 18 and 21 are permenent magnet materials; they are closely related to Incor 16 (Alloy Digest Co-77, June 1981). Incor 18 and 21 are important to design engineers in many fields. They can be used to design motors that are smaller, lighter and more powerful than those made with conventional magnet materials. They also can be used to improve microwave tubes, magnetic drives and couplings and electronic devices. Incor 18 and 21, like Incor 16, can be used to lower size and weight in a wide range of other products where permanent magnets are used. This datasheet provides information on composition, physical properties, hardness, and tensile properties. It also includes information on forming and machining. Filing Code: Co-78. Producer or source: Indiana General Magnet Products.

INCOR 16

Alloy Digest ◽  
1981 ◽  
Vol 30 (6) ◽  
Keyword(s):  
Physical Properties ◽  
Tensile Properties ◽  
Permanent Magnets ◽  
Electronic Devices ◽  
Design Engineers ◽  
Wide Range ◽  
Magnet Material ◽  
Permanent Magnet Material ◽  
Lower Size ◽  
Powerful Microwave

Abstract INCOR 16 is a permanent-magnet material. It is an important tool for design engineers in many fields; in fact, it is a powerful extension to the design and product possibilities available with magnet technology. Incor 16 can be used to design motors that are smaller, lighter and more powerful. Microwave tubes can handle higher capacities. Magnetic drives and couplings can be made smaller and operated at higher torque levels. Electronic devices can be made more compact. Incor 16 can be used to lower size and weight in a wide range of other products where permanent magnets are used. This datasheet provides information on composition, physical properties, hardness, and tensile properties. It also includes information on forming and machining. Filing Code: Co-77. Producer or source: Indiana General Magnet Products.

scholarly journals Experimental Investigation on Mechanical Properties of Carbon Nanotube-Reinforced Epoxy Composites for Automobile Application

2021 ◽  
Vol 2021 ◽  
pp. 1-7
Author(s):  
Anjibabu Merneedi ◽  
L. Natrayan ◽  
S. Kaliappan ◽  
Dhinakaran Veeman ◽  
S. Angalaeswari ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Carbon Nanotubes ◽  
Short Form ◽  
Chemical Properties ◽  
Weight Ratio ◽  
High Strength ◽  
Full Potential ◽  
Design Engineers ◽  
Wide Range ◽  
Potential Carbon

Carbon nanotubes are established as a superior form of carbon. These have superior characteristics in terms of mechanical and chemical properties when compared to the other fibres available. High-strength fibres can be employed in a composite in a short form and mass-produced to fulfil high demands in composite applications. These composites can meet the strength requirements of nonstructural and structural components in a wide range of industries. Because of their light weight and excellent strength-to-weight ratio, these composites can be used in a wide range of applications. With Young’s modulus as high as 1 TPa and tensile strength up to 63 GPa, they are among the stiffest and strongest fibres. There is currently a lot of interest in using carbon nanotubes in a matrix to take advantage of these features. There have been a variety of polymer matrices used, and nanotube/ceramic and nanotube/metal composites are gaining popularity. The study of these materials is an ongoing process, as researchers and design engineers have yet to realize their full potential. Carbon nanotubes (CNTs) are used in this study to create the composite with the resin. The percentage of CNT used as a filler material in the composite is varied from 1 to 4 percent, with the best percentage chosen for optimal mechanical properties.

A Method for the Study of Information Use Profiles for Design Engineers

1999 ◽  
Author(s):  
Alistair Lowe ◽  
Chris McMahon ◽  
Tulan Shah ◽  
Steve Culley
Keyword(s):  
Information Systems ◽  
Local Group ◽  
Technical Information ◽  
Structured Interviews ◽  
Information Requirements ◽  
Design Information ◽  
Design Engineers ◽  
The Social ◽  
Group Information ◽  
Computer Based

Abstract This paper reports on an investigation into the way in which designers from two aerospace companies organise and use information in their work. There remains relatively poor understanding of what the technical information requirements for engineers are. However, such an understanding is essential for the successful development of computer based design information systems. The concept of Design Information Profiles (DIPs) is proposed as a means of identifying these information requirements for a range of engineers working in different design contexts. These different contexts are characterised by the stage of the design life-cycle and also the social environment in which the engineers work. Profiles have been collected through structured interviews and observations of the participants at work. The results of the information profiles indicate important differences in the extent to which personal, local group and company-wide information is used by designers from different design contexts. An ‘audit’ of the participants’ personal and local group information stores is also reported. These results are likely to have implications for the future development of computer based design information systems.

Perspectives used in studying professions: social policy and public administration

2020 ◽  
pp. 69-86
Author(s):  
Nigel Malin
Keyword(s):  
Social Policy ◽  
Public Administration ◽  
Service Users ◽  
Elite Group ◽  
Wide Range ◽  
External Stakeholders

This chapter discusses several perspectives on professions and professionalism taken from other disciplines e.g social policy and public administration. For instance, the post-structuralist account demonstrates power as dispersed and not simply located in any elite group but lying in administrative machinery and focuses on key ‘discourses’ or events associated with particular social periods and places as having a formative impact. A contrasting framework, Democratic or Collaborative Professionalism, extends the ambit of professionalism where the directions and ideals of different actors achieve greater sensitivity to the interests of a wide range of external stakeholders, for example service users, patients, students and community representatives.

Workers’ Definitions of the Characteristics That Comprise Good Work: A Qualitative Analysis

2020 ◽  
Vol 31 (3) ◽  
pp. 346-371
Author(s):  
Steven H. Hattrup ◽  
Mark Edwards ◽  
Kenneth H. Funk
Keyword(s):  
Work Design ◽  
Positive Interactions ◽  
Good Work ◽  
Full Time ◽  
Design Engineers ◽  
Quantitative Studies ◽  
New Information ◽  
Wide Range ◽  
Design Characteristics ◽  
Depth Interviews

Managers and work design engineers seek to improve productivity while maintaining sustainable and viable organizations. This study provides new information for such practitioners to do that while informing theoretical reflections on what constitutes “good work”. Using an inductive qualitative approach, we describe results of a study of 30 in-depth interviews with full-time workers in the Western United States representing a wide range of occupations. We allow workers to generate their concepts about what constitutes good work and compare this with their reactions to prompts derived from existing research. The three most common job characteristics that workers say are important are (1) positive interactions with people, (2) work that provides social value, and (3) control over work. This study adds to extant quantitative studies of work design characteristics because it provides workers’ spontaneous yet coherent perspectives and demonstrates where those agree or not with prior findings. For example, our study reveals that workers strongly distinguish between two kinds of feedback at work: feedback from impersonal systems (e.g., equipment displays) and feedback from managers and other employees. Our study also finds newly emerging characteristics that have yet to be adequately addressed in assessing “good work”: effective and ethical management, job stability, and mutual trust.

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