Static and Fatigue Failure of Bolted Joints in Hybrid Composite-Aluminium Aircraft Structures PDF Download
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Author: Zlatan Kapidzic
Publisher: Linköping University Electronic Press
ISBN: 9176859428
Category :
Languages : en
Pages : 71
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Book Description
The use of fibre composites in the design of load carrying aircraft structures has been increasing over the last few decades. At the same time, aluminium alloys are still present in many structural parts, which has led to an increase of the number of hybrid composite-aluminium structures. Often, these materials are joined at their interface by bolted connections. Due to their different response to thermal, mechanical and environmental impact, the composite and the aluminium alloy parts are subject to different design and certification practices and are therefore considered separately.The current methodologies used in the aircraft industry lack well-developed methods to account for the effects of the mismatch of material properties at the interface.One such effect is the thermally induced load which arises at elevated temperature due to the different thermal expansion properties of the constituent materials. With a growing number of hybrid structures, these matters need to be addressed. The rapid growth of computational power and development of simulation tools in recent years have made it possible to evaluate the material and structural response of hybrid structures without having to entirely rely on complex and expensive testing procedures.However, as the failure process of composite materials is not entirely understood, further research efforts are needed in order to develop reliable material models for the existing simulation tools. The work presented in this dissertation involves modelling and testing of bolted joints in hybrid composite-aluminium structures.The main focus is directed towards understanding the failure behaviour of the composite material under static and fatigue loading, and how to include this behaviour in large scale models of a typical bolted airframe structure in an efficient way. In addition to that, the influence of thermally induced loads on the strength and fatigue life is evaluated in order to establish a design strategy that can be used in the industrial context. The dissertation is divided into two parts. In the first one, the background and the theory are presented while the second one consists of five scientific papers
Author: Zlatan Kapidzic
Publisher: Linköping University Electronic Press
ISBN: 9176859428
Category :
Languages : en
Pages : 71
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Book Description
The use of fibre composites in the design of load carrying aircraft structures has been increasing over the last few decades. At the same time, aluminium alloys are still present in many structural parts, which has led to an increase of the number of hybrid composite-aluminium structures. Often, these materials are joined at their interface by bolted connections. Due to their different response to thermal, mechanical and environmental impact, the composite and the aluminium alloy parts are subject to different design and certification practices and are therefore considered separately.The current methodologies used in the aircraft industry lack well-developed methods to account for the effects of the mismatch of material properties at the interface.One such effect is the thermally induced load which arises at elevated temperature due to the different thermal expansion properties of the constituent materials. With a growing number of hybrid structures, these matters need to be addressed. The rapid growth of computational power and development of simulation tools in recent years have made it possible to evaluate the material and structural response of hybrid structures without having to entirely rely on complex and expensive testing procedures.However, as the failure process of composite materials is not entirely understood, further research efforts are needed in order to develop reliable material models for the existing simulation tools. The work presented in this dissertation involves modelling and testing of bolted joints in hybrid composite-aluminium structures.The main focus is directed towards understanding the failure behaviour of the composite material under static and fatigue loading, and how to include this behaviour in large scale models of a typical bolted airframe structure in an efficient way. In addition to that, the influence of thermally induced loads on the strength and fatigue life is evaluated in order to establish a design strategy that can be used in the industrial context. The dissertation is divided into two parts. In the first one, the background and the theory are presented while the second one consists of five scientific papers
Author: Mary Kathryn Thompson
Publisher: ICAD 2013
ISBN: 0989465802
Category : Technology & Engineering
Languages : en
Pages : 231
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Book Description
Author: Sergio T. Amancio Filho
Publisher: John Wiley & Sons
ISBN: 1118177630
Category : Technology & Engineering
Languages : en
Pages : 416
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Book Description
A comprehensive introduction to the concepts of joining technologies for hybrid structures This book introduces the concepts of joining technology for polymer-metal hybrid structures by addressing current and new joining methods. This is achieved by using a balanced approach focusing on the scientific features (structural, physical, chemical, and metallurgical/polymer science phenomena) and engineering properties (mechanical performance, design, applications, etc.) of the currently available and new joining processes. It covers such topics as mechanical fastening, adhesive bonding, advanced joining methods, and statistical analysis in joining technology. Joining of Polymer-Metal Hybrid Structures: Principles and Applications is structured by joining principles, in adhesion-based, mechanical fastened, and direct-assembly methods. The book discusses such recent technologies as friction riveting, friction spot joining and ultrasonic joining. This is used for applications where the original base material characteristics must remain unchanged. Additional sections cover the main principles of statistical analysis in joining technology (illustrated with examples from the field of polymer-metal joining). Joining methods discussed include mechanical fastening (bolting, screwing, riveting, hinges, and fits of polymers and composites), adhesive bonding, and other advanced joining methods (friction staking, laser welding, induction welding, etc.). Provides a combined engineering and scientific approach used to describe principles, properties, and applications of polymer-metal hybrid joints Describes the current developments in design of experiments and statistical analysis in joining technology with emphasis on joining of polymer-metal hybrid structures Covers recent innovations in joining technology of polymer-metal hybrid joints including friction riveting, friction spot joining, friction staking, and ultrasonic joining Principles illustrated by pictures, 3D-schemes, charts, and drawings using examples from the field of polymer-metal joining Joining of Polymer-Metal Hybrid Structures: Principles and Applications will appeal to chemical, polymer, materials, metallurgical, composites, mechanical, process, product, and welding engineers, scientists and students, technicians, and joining process professionals.
Author: N. Rajic
Publisher: Materials Research Forum LLC
ISBN: 1644902443
Category : Technology & Engineering
Languages : en
Pages : 396
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Book Description
The book presents the proceedings of the 9th Asia-Pacific Workshop on Structural Health Monitoring. With the increasing worldwide emphasis on asset sustainability, there is a trend toward Condition-Based Maintenance (CBM) and Reliability-Centred Maintenance (RCM). Both approaches require diagnostic systems which detect damage and monitor structural health and/or prognostic systems that predict the future health of a structure. Keywords: Vibration Monitoring, Railway Bridge, Strain-based Damage, Turbine Blades, Crack and Temperature Sensing, Bone Degradation, Prefabricated Concrete Frame, Impact Damage in Composites, Ferroelectric Single Crystals, Evaluation of Human Injury, Automatic Damage Assessment, Metal-Composite Plates, Osseointegration, High-rise Buildings, Acoustic Emission Source. Earthquake, Wind Turbine Rotor Blades. Smart Cables, Thermal Damages, Cement Materials, Multi-parameter Monitoring, Petri Net Model, Maintenance Strategies, Load Bearing Antenna, Thin Metal Joints, Aerospace Structure.
Author:
Publisher:
ISBN:
Category : Aeronautics
Languages : en
Pages : 702
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Book Description
Author: Nicholas Fantuzzi
Publisher: MDPI
ISBN: 3036501363
Category : Technology & Engineering
Languages : en
Pages : 220
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Book Description
The problem of solving complex engineering problems has always been a major topic in all industrial fields, such as aerospace, civil and mechanical engineering. The use of numerical methods has increased exponentially in the last few years, due to modern computers in the field of structural mechanics. Moreover, a wide range of numerical methods have been presented in the literature for solving such problems. Structural mechanics problems are dealt with using partial differential systems of equations that might be solved by following the two main classes of methods: Domain-decomposition methods or the so-called finite element methods and mesh-free methods where no decomposition is carried out. Both methodologies discretize a partial differential system into a set of algebraic equations that can be easily solved by computer implementation. The aim of the present Special Issue is to present a collection of recent works on these themes and a comparison of the novel advancements of both worlds in structural mechanics applications.
Author: Martin Wiedemann
Publisher: Springer Science & Business Media
ISBN: 3642291902
Category : Technology & Engineering
Languages : en
Pages : 456
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Book Description
Composite structures are most efficient in performance and production cost when combined with smart materials making them adaptable to changing operational conditions. The specific production processes of composites offer the possibility to integrate more functions thus making the structure more valuable. Active functions can be realized by smart materials, e.g. morphing, active vibration control, active structure acoustic control or structure health monitoring. The foundation is a sound understanding of materials, design methods, design principles, production technologies and adaptronics. Along the complete process chain this disciplines together deliver advanced lightweight solutions for applications ranging from mechanical engineering to vehicles, airframe and finally space structures. This book provides the scientific foundations as well as inspiring new ideas for engineers working in the field of composite lightweight structures.
Author: Ayesha Kausar
Publisher: Woodhead Publishing
ISBN: 0323996582
Category : Technology & Engineering
Languages : en
Pages : 369
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Book Description
Polymeric Nanocomposites with Carbonaceous Nanofillers for Aerospace Applications offers a comprehensive paperback on the aerospace relevance of polymer/carbonaceous nanofiller-based nanocomposite. This manuscript summarizes all specific information on the design, fabrication and application areas of aerospace industry that employ polymer/carbonaceous nanofiller-based nanocomposites. In addition, it points to the potential of aeronautical nanocomposites towards lightning strike, radiation shielding, anti-corrosion, electronic/optical features, thermal management, antistatic application, self-healing aptitude, and green nanocomposites. The modeling of mechanical and essential properties of aerospace nanocomposites is also discussed, along with challenges and future forecasts of polymer/carbonaceous nanofiller nanocomposites. - Focuses on essential aerospace composites, carbonaceous nanofillers, and ensuing polymer/carbonaceous nanofiller-based nanocomposites - Explores indispensable properties of aeronautical nanocomposites, modeling of physical properties, and combined influence of carbonaceous nanofillers and carbon fibers on space material properties - Includes up-to-date technical applications of polymer/carbonaceous nanofiller-based nanocomposites in design, mechanical robustness, heat resistance, non-flammability, anti-corrosion, radiation shielding, lightning strike prevention, electronic/optical features, antistatic application, self-healing, thermal management, and green nanocomposites for aeronautical relevance
Author: Viktor Gribniak
Publisher: MDPI
ISBN: 3036507248
Category : Technology & Engineering
Languages : en
Pages : 378
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Book Description
Engineering practice has revealed that innovative technologies’ structural applications require new design concepts related to developing materials with mechanical properties tailored for construction purposes. This would allow the efficient use of engineering materials. The efficiency can be understood in a simplified and heuristic manner as the optimization of performance and the proper combination of structural components, leading to the consumption of the least amount of natural resources. The solution to the eco-optimization problem, based on the adequate characterization of the materials, will enable implementing environmentally friendly engineering principles when the efficient use of advanced materials guarantees the required structural safety. Identifying fundamental relationships between the structure of advanced composites and their physical properties is the focus of this book. The collected articles explore the development of sustainable composites with valorized manufacturability corresponding to Industrial Revolution 4.0 ideology. The publications, amongst others, reveal that the application of nano-particles improves the mechanical performance of composite materials; heat-resistant aluminium composites ensure the safety of overhead power transmission lines; chemical additives can detect the impact of temperature on concrete structures. This book demonstrates that construction materials’ choice has considerable room for improvement from a scientific viewpoint, following heuristic approaches.
Author: P Camanho
Publisher: Elsevier
ISBN: 0857094920
Category : Technology & Engineering
Languages : en
Pages : 537
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Book Description
The growing use of composites over metals for structural applications has made a thorough understanding of the behaviour of composite joints in various applications essential for engineers, but has also presented them with a new set of problems. Composite joints and connections addresses these differences and explores the design, modelling and testing of bonded and bolted joints and connections.Part one discusses bolted joints whilst part two examines bonded joints. Chapters review reinforcement techniques and applications for composite bolted and bonded joints and investigate the causes and effects of fatigue and stress on both types of joint in various applications and environments. Topics in part one include metal hybridization, glass-reinforced aluminium (GLARE), hybrid fibre metal laminates (FML), glass fibre reinforced polymer (GFRP) and carbon fibre reinforced polymer (CFRP) composites. Topics in part two include calculation of strain energy release rates, simulating fracture and fatigue failure using cohesive zone models, marine and aerospace applications, advanced modelling, stress analysis of bonded patches and scarf repairs.Composite joints and connections is a valuable reference for composite manufacturers and composite component fabricators, the aerospace, automotive, shipbuilding and civil engineering industries and for anyone involved in the joining and repair of composite structures. - Explores the design, modelling and testing of bonded and bolted joints and connections - Reviews reinforcement techniques and applications for composite bolted and bonded joints - Investigates the causes and effects of fatigue and stress on bolted and bonded joints in various applications and environments
