Damage Growth In Composite Bolted Joints
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| Author | : V. Giavotto |
| Publisher | : |
| Total Pages | : 12 |
| Release | : 1988 |
| Genre | : |
| ISBN | : |
Static and fatigue failures of composite joints are dominated by the growth and propagation of typical damages, up to some catastrophic condition. Starting from experimental observations some typical damage propagation patterns are identified and analyzed with simple models and finite element schemes. This extension of the fracture mechanics approach, to a broader class of damages allows some insight into the intricate behavior of FRP joints, and gives some suggestion for interpreting and correlating experimental data. Fatigue and failure of composite materials are still a difficult and intriguing problem, despite the large research effort devoted to them in the last years. This applies even more strongly to bolted joints, where fatigue damage and static failure are likely to occur at lower load levels and with more complicated patterns. These are several different reasons for this fact, the first being the real intricacy of the complex phenomena involved in composite failure, especially at a microscopic level. But definitely, another reason has been the unsuccessful attempt to transfer too literally the Fatigue and Fracture Mechanics approach, that was successful for metals. (SDW).
| Author | : L. J. Hart-Smith |
| Publisher | : |
| Total Pages | : 162 |
| Release | : 1976 |
| Genre | : |
| ISBN | : |
| Author | : P Camanho |
| Publisher | : Elsevier |
| Total Pages | : 537 |
| Release | : 2011-10-12 |
| Genre | : Technology & Engineering |
| ISBN | : 0857094920 |
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
| Author | : H. Bau |
| Publisher | : |
| Total Pages | : 17 |
| Release | : 2004 |
| Genre | : Bolted joints |
| ISBN | : |
This study's overall goal is to develop methods to accurately predict the strength of notched composite laminates. Empirical analyses of notched composite test data led to an understanding of failure mechanisms. Trends in ultimate strength versus layup parameters were extracted from several DoD test programs. A test program with incrementally loaded, notched coupons was conducted to track sub-critical damage. Damage states at near-ultimate loads were correlated to the ultimate strength trends. These trends were then attributed to specific matrix damage types.
| Author | : Peter W. R Beaumont |
| Publisher | : Springer |
| Total Pages | : 954 |
| Release | : 2016-11-26 |
| Genre | : Technology & Engineering |
| ISBN | : 3319461206 |
This book brings together a diverse compilation of inter-disciplinary chapters on fundamental aspects of carbon fiber composite materials and multi-functional composite structures: including synthesis, characterization, and evaluation from the nano-structure to structure meters in length. The content and focus of contributions under the umbrella of structural integrity of composite materials embraces topics at the forefront of composite materials science and technology, the disciplines of mechanics, and development of a new predictive design methodology of the safe operation of engineering structures from cradle to grave. Multi-authored papers on multi-scale modelling of problems in material design and predicting the safe performance of engineering structure illustrate the inter-disciplinary nature of the subject. The book examines topics such as Stochastic micro-mechanics theory and application for advanced composite systems Construction of the evaluation process for structural integrity of material and structure Nano- and meso-mechanics modelling of structure evolution during the accumulation of damage Statistical meso-mechanics of composite materials Hierarchical analysis including "age-aware," high-fidelity simulation and virtual mechanical testing of composite structures right up to the point of failure. The volume is ideal for scientists, engineers, and students interested in carbon fiber composite materials, and other composite material systems.
| Author | : Liyong Tong |
| Publisher | : Springer Science & Business Media |
| Total Pages | : 262 |
| Release | : 2013-03-09 |
| Genre | : Technology & Engineering |
| ISBN | : 9401703299 |
Joints in components or structures incur a weight penalty, are a source of failure, cause manufacturing problems, and are unfortunately unavoidable in most structures ranging from aircraft, and spacecraft to ships and offshore platforms, to automobiles, bridges and buildings. An important requirement for the complete design of practical structures is the development of attachment methods and joint designs. Recent Advances in Structural Joints and Repairs for Composite Materials provides an up-to-date account of adhesively bonded and mechanically fastened joints and repairs. Audience: This book will prove to be an informative resource for all engineers and researchers involved with joining and repair of composite structures.
| Author | : Edward M. Lenoe |
| Publisher | : Springer Science & Business Media |
| Total Pages | : 858 |
| Release | : 2012-12-06 |
| Genre | : Technology & Engineering |
| ISBN | : 1468410334 |
The Fourth Conference on Fibrous Composites in Structural Design was a successor to the First-to-Third Conferences on Fibrous Composites in Flight Vehicle Design sponsored by the Air Force (First and Second Conferences, September 1973 and May 1974) and by NASA (Third Conference, November 1975) which were aimed at focusing national attention on flight vehicle applications of a new class of fiber reinforced materials, the advanced com posites, which afforded weight savings and other advantages which had not been previously available. The Fourth Conference, held at San Diego, California, 14-17 November 1978, was the fi rst of these conferences to be jointly sponsored by the Army, Navy and Ai r Force together with NASA, as well as being the first to give attention to non-aerospace applications of fiber reinforced composites. While the design technology for aerospace applications has reached a state of relative maturity, other areas of application such as mi litary bridging, flywheel energy storage systems, ship and surface vessel components and ground vehicle components are in an early stage of development, and it was an important objective to pinpoint where careful attention to structural design was needed in such applications to achfeve maximum structural performance payoff together with a high level of reliability and attractive economics.
| Author | : Zlatan Kapidzic |
| Publisher | : Linköping University Electronic Press |
| Total Pages | : 71 |
| Release | : 2015-11-02 |
| Genre | : |
| ISBN | : 9176859428 |
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 | : Rikard Benton Heslehurst |
| Publisher | : CRC Press |
| Total Pages | : 216 |
| Release | : 2014-04-21 |
| Genre | : Technology & Engineering |
| ISBN | : 146658047X |
The advantages of composite materials include a high specific strength and stiffness, formability, and a comparative resistance to fatigue cracking and corrosion. However, not forsaking these advantages, composite materials are prone to a wide range of defects and damage that can significantly reduce the residual strength and stiffness of a structure or result in unfavorable load paths. Emphasizing defect identification and restitution, Defects and Damage in Composite Materials and Structures explains how defects and damage in composite materials and structures impact composite component performance. Providing ready access to an extensive, descriptive list of defects and damage types, this must-have reference: Examines defect criticality in composite structures Recommends repair actions to restore structural integrity Discusses failure modes and mechanisms of composites due to defects Reviews NDI processes for finding and identifying defects in composite materials Relating defect detection methods to defect type, the author merges his experience in the field of in-service activities for composite airframe maintenance and repair with indispensable reports and articles on defects and damage in advanced composite materials from the last 50 years.
| Author | : |
| Publisher | : |
| Total Pages | : 294 |
| Release | : 1997 |
| Genre | : Adhesive joints |
| ISBN | : |
