The Effect of Loading Parameters on Fatigue of Composite Laminates: Part V.

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ISBN 13 :
Total Pages : 0 pages
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Book Synopsis The Effect of Loading Parameters on Fatigue of Composite Laminates: Part V. by :

Download or read book The Effect of Loading Parameters on Fatigue of Composite Laminates: Part V. written by and published by . This book was released on 2001 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: This report is the fifth in a series of reports on the damage growth of notched and visible impact-damaged AS4/3501-6 graphite/epoxy quasi-isotropic laminates under long-term mechanical fatigue loading. The effects of load type, load level, load sequence, and spectrum modification are evaluated in this study. X-ray radiography is taken of the test specimens to monitor the fatigue damage, which are in the form of splitting and delamination around the center hole of a specimen. Modifying the compression-dominated loading spectrum by omitting the two lowest load levels has been found to have little effect on the propagation of damage while reducing testing time by 99.7%. Experimental results indicate that growth of split-induced delamination under constant amplitude tension-compression (T-C) fatigue occurs mostly between and along the splits in a narrow band. Under compression-compression (C-C) loading, the mode of damage growth changes from splitting to widthwise extension of delamination and fiber failure. None of the open-hole specimens failed after 10(exp 6) cycles under constant amplitude tension-tension (T-T) loading. However, x-ray radiography showed that the specimens suffered very different damage at different load levels. The residual compressive strength (RCS) is influenced by the type of damage to varying degrees depending on the load levels. In spectrum fatigue loading, residual tensile strength (RTS) were relatively unaffected while RCS was affected significantly. Thus, it is difficult to identify a single damage parameter that could be correlated to changes in strength. However, there is enough data to propose a prediction model for open-hole specimens under constant amplitude loading, which matched well with collected data.

After about 1877

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ISBN 13 :
Total Pages : pages
Book Rating : 4.:/5 (64 download)

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Book Synopsis After about 1877 by :

Download or read book After about 1877 written by and published by . This book was released on 1969 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

The Effect of Loading Parameters on Fatigue of Composite Laminates: Part 3

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Book Synopsis The Effect of Loading Parameters on Fatigue of Composite Laminates: Part 3 by :

Download or read book The Effect of Loading Parameters on Fatigue of Composite Laminates: Part 3 written by and published by . This book was released on 1999 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: The long-term mechanical fatigue of quasi-isotropic graphite/epoxy laminates was investigated to determine the influence of loading parameters on impact-induced delamination growth during constant-amplitude and spectrum fatigue loading. Based on the test results, recommendations for fatigue design of composite laminates in the presence of barely visible impact damage (BVID) are suggested.

The Effect of Loading Parameters on Fatigue of Composite Laminates

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ISBN 13 :
Total Pages : 92 pages
Book Rating : 4.:/5 (1 download)

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Book Synopsis The Effect of Loading Parameters on Fatigue of Composite Laminates by : H. Thomas Han

Download or read book The Effect of Loading Parameters on Fatigue of Composite Laminates written by H. Thomas Han and published by . This book was released on 1997 with total page 92 pages. Available in PDF, EPUB and Kindle. Book excerpt:

The Effect of Loading Parameters on Fatigue of Composite Laminates

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Publisher :
ISBN 13 :
Total Pages : 68 pages
Book Rating : 4.:/5 (47 download)

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Book Synopsis The Effect of Loading Parameters on Fatigue of Composite Laminates by : H. Thomas Han

Download or read book The Effect of Loading Parameters on Fatigue of Composite Laminates written by H. Thomas Han and published by . This book was released on 2000 with total page 68 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Fatigue/impact Studies in Laminated Composites

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Publisher :
ISBN 13 :
Total Pages : 160 pages
Book Rating : 4.3/5 (91 download)

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Book Synopsis Fatigue/impact Studies in Laminated Composites by : V. Sarma Avva

Download or read book Fatigue/impact Studies in Laminated Composites written by V. Sarma Avva and published by . This book was released on 1983 with total page 160 pages. Available in PDF, EPUB and Kindle. Book excerpt: The residual strength of the impact-damaged laminates can be predicted using an analytical model. Both the power law and the wearout models appear to be useful in predicting the fatigue life of the composite laminates. However, because of the slope parameter, the wearout model appears to have a slight edge over the power law model, particularly at low fatigue life and higher applied stress. The strength degradation due to cyclic loading in notched laminates was found to be extremely small up to a million cycles. The residual strength of the fatigue-damaged laminates was found to increase (in proportion to the applied maximum stress with R = 0.1) after a million fatigue cycles. Impact loading followed by cyclic loading was found to be more damaging (in reducing the life of the laminate) than the reversed sequence of loading. The magnitude of the minimum projectile velocity causing catastrophic failure in the laminates tested was found as a function of the applied stress and the number of fatigue cycles.

Internal Load Distribution Effects During Fatigue Loading of Composite Laminates

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ISBN 13 :
Total Pages : 19 pages
Book Rating : 4.:/5 (125 download)

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Book Synopsis Internal Load Distribution Effects During Fatigue Loading of Composite Laminates by : AL. Highsmith

Download or read book Internal Load Distribution Effects During Fatigue Loading of Composite Laminates written by AL. Highsmith and published by . This book was released on 1986 with total page 19 pages. Available in PDF, EPUB and Kindle. Book excerpt: Two fundamental processes govern the reduction of strength and stiffness of composite laminates caused by cyclic loading, commonly called the "fatigue effect." One process is the reduction of the strength and stiffness of the individual constituent materials in the composite, caused by events such as localized nonconservative deformation, microcrack formation, and substructure variations. This process is essentially the source of the "fatigue effect" homogeneous materials, except that macrocrack formation and fracture dominated by a single crack generally does not occur as a consequence of this process in composite materials. In laminated composites there is another fundamental process which plays a major role in determining residual properties. That process is the damage-dependent redistribution of load sharing among the plies of the laminate caused by the continuous variation of the elastic stiffness properties of each ply induced by microdamage development in those plies. Experience suggests that this process is critical and, in some cases, dominant in the determination of the residual strength and life of a laminate under cyclic loading. This paper addresses the experimental and analytical aspects of this fundamental process. The results of the present work indicate that strain (and stress) redistributions in regions of highly localized damage are large and significant. The general nature of these redistributions has been established, which provides the first firm foundation for the formulation of the philosophy needed to interpret these physical damage states in terms of residual strength and life.

Fatigue of Filamentary Composite Materials

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Publisher : ASTM International
ISBN 13 :
Total Pages : 284 pages
Book Rating : 4./5 ( download)

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Book Synopsis Fatigue of Filamentary Composite Materials by : K. L Reifsnider

Download or read book Fatigue of Filamentary Composite Materials written by K. L Reifsnider and published by ASTM International. This book was released on 1977 with total page 284 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Fatigue Damage-strength Relationships in Composite Laminates. Volume 1

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Publisher :
ISBN 13 :
Total Pages : 58 pages
Book Rating : 4.:/5 (319 download)

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Book Synopsis Fatigue Damage-strength Relationships in Composite Laminates. Volume 1 by : Kenneth L. Reifsnider

Download or read book Fatigue Damage-strength Relationships in Composite Laminates. Volume 1 written by Kenneth L. Reifsnider and published by . This book was released on 1983 with total page 58 pages. Available in PDF, EPUB and Kindle. Book excerpt: This report is Vol. I of a 2-part final report on the activities which were conducted under Contract No. F33615-81-3225. The general objective of this program was to investigate the precise nature of the damage events caused by cyclic (fatigue) loading of composite laminates that are directly related to fracture of those laminates, to develop a conceptual understanding of how those damage events reduce the residual strength of the laminates, and to determine how the collective damage condition following long-term cyclic loading precipitates the final fracture event. The program was conducted in four phases: (1) the development of fatigue damage during long-term cyclic loading was investigated in such a way that the damage events which occur quite late in the fatigue life of the material, just prior to fracture, were identified and characterized; (2) the special contribution and nature of fiber fracture was investigated; (3) the nature of the collective damage condition which precipitates the fracture event under long-term fatigue loading was investigated; (4) a philosophy of fracture in composite laminates following severe damage development due to cyclic loading was developed. A wide variety of destructive and nondestructive experimental evaluation schemes were used in the program, and several analytical efforts were conducted to support the experimental activities.

European Workshop on Structural Health Monitoring

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Publisher : Springer Nature
ISBN 13 : 3031072545
Total Pages : 933 pages
Book Rating : 4.0/5 (31 download)

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Book Synopsis European Workshop on Structural Health Monitoring by : Piervincenzo Rizzo

Download or read book European Workshop on Structural Health Monitoring written by Piervincenzo Rizzo and published by Springer Nature. This book was released on 2022-06-18 with total page 933 pages. Available in PDF, EPUB and Kindle. Book excerpt: This volume gathers the latest advances, innovations, and applications in the field of structural health monitoring (SHM) and more broadly in the fields of smart materials and intelligent systems, as presented by leading international researchers and engineers at the 10th European Workshop on Structural Health Monitoring (EWSHM), held in Palermo, Italy on July 4-7, 2022. The volume covers highly diverse topics, including signal processing, smart sensors, autonomous systems, remote sensing and support, UAV platforms for SHM, Internet of Things, Industry 4.0, and SHM for civil structures and infrastructures. The contributions, which are published after a rigorous international peer-review process, highlight numerous exciting ideas that will spur novel research directions and foster multidisciplinary collaboration among different specialists.

American Society for Composites / American Society for Testing And Materials Committee D30

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Publisher : DEStech Publications, Inc
ISBN 13 : 1932078444
Total Pages : 1464 pages
Book Rating : 4.9/5 (32 download)

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Book Synopsis American Society for Composites / American Society for Testing And Materials Committee D30 by : Erian Armanios

Download or read book American Society for Composites / American Society for Testing And Materials Committee D30 written by Erian Armanios and published by DEStech Publications, Inc. This book was released on 2004-10 with total page 1464 pages. Available in PDF, EPUB and Kindle. Book excerpt: Highlights the recent developments in the fundamental understanding of composites; important information for researchers and composite scientists.

Effect of High Load on the Fatigue Behavior of Unnotched Graphite/Epoxy Laminates

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ISBN 13 :
Total Pages : 53 pages
Book Rating : 4.:/5 (227 download)

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Book Synopsis Effect of High Load on the Fatigue Behavior of Unnotched Graphite/Epoxy Laminates by : C. T. Sun

Download or read book Effect of High Load on the Fatigue Behavior of Unnotched Graphite/Epoxy Laminates written by C. T. Sun and published by . This book was released on 1978 with total page 53 pages. Available in PDF, EPUB and Kindle. Book excerpt: The purpose of this research program is to verify experimentally the theoretical prediction for the effect of the high load on the fatigue behavior of unnotched composite laminates. A three-parameter fatigue and residual strength degradation model has been used to derive the number of load cycles a specimen can survive and the statistical distributions of the fatigue life and the residual strength after the specimen has survived an initial high load or periodic high loads. One set of the static ultimate strength data and one set of the fatigue scan data were generated to determine the three-parameter values appearing in the theoretical model.

Post-impact Fatigue Behavior of Composite Laminates

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Publisher : Nova Science Pub Incorporated
ISBN 13 : 9781616686727
Total Pages : 128 pages
Book Rating : 4.6/5 (867 download)

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Book Synopsis Post-impact Fatigue Behavior of Composite Laminates by : Alkis Paipetis

Download or read book Post-impact Fatigue Behavior of Composite Laminates written by Alkis Paipetis and published by Nova Science Pub Incorporated. This book was released on 2011-03-01 with total page 128 pages. Available in PDF, EPUB and Kindle. Book excerpt: During their service life, composite laminates are subjected to various transient loadings which often lead to the deterioration of their structural integrity. This deterioration may be manifested in various forms; with increasing impact energy these forms range from delamination to flexural damage to penetration. This book presents a thorough overview of the aspects related to post impact damage in composite laminates and its subsequent development under fatigue loading.

Fatigue Damage-Strength Relationships in Composite Laminates. Volume 2

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ISBN 13 :
Total Pages : 60 pages
Book Rating : 4.:/5 (319 download)

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Book Synopsis Fatigue Damage-Strength Relationships in Composite Laminates. Volume 2 by : Kenneth L. Reifsnider

Download or read book Fatigue Damage-Strength Relationships in Composite Laminates. Volume 2 written by Kenneth L. Reifsnider and published by . This book was released on 1984 with total page 60 pages. Available in PDF, EPUB and Kindle. Book excerpt: This report presents information and experience generated during the subject investigation which provided support for the major thrust of the effort, but was not the eventual focus of the program. The activities are discussed in the context of the various experimental techniques used (and developed) to investigate the context of the damage development. Whil much of the information discussed is not complete, it is thought that a description of the experimental methods and experiences will be valuable to the technical community. Included are descriptions of virtually every experimental technique used in this program and a variety of findings not discussed elsewhere.

Stress Concentrations in Laminated Composites

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Publisher : Routledge
ISBN 13 : 1351413368
Total Pages : 483 pages
Book Rating : 4.3/5 (514 download)

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Book Synopsis Stress Concentrations in Laminated Composites by : Seng C. Tan

Download or read book Stress Concentrations in Laminated Composites written by Seng C. Tan and published by Routledge. This book was released on 2017-10-19 with total page 483 pages. Available in PDF, EPUB and Kindle. Book excerpt: From the Author's PrefaceThe objective of this book is to provide a thorough and systematic study of the problem of laminated composites containing stress concentrations. Stress concentrations are introduced in laminated plates in the forms of circular holes, elliptical openings and straight cracks. These forms of cutouts have many practical applications, and are familiar to most engineers. Stress concentrations exist in all known structural components. Stress concentrations have great practical importance because they are normally the cause of failure. In addition to stress analyses of laminated composites, we need more fundamental understanding of the failure mode, the failure criterion, the effects on global laminate response, and the design of composites in the presence of stress concentrations. In this book, all the subjects studied are closely related to the problem of stress concentrations in laminated composites . . . . All the models are verified with many experimental results. The underlying objective of this comprehensive study is to give the readers an in-depth and thorough understanding of the problem of stress concentrations in composites. This book is the first to address the problem of laminated composites containing stress concentrations in a systematic way.

Fatigue of Composite Materials

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Publisher : Elsevier
ISBN 13 : 0444597182
Total Pages : 532 pages
Book Rating : 4.4/5 (445 download)

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Book Synopsis Fatigue of Composite Materials by : K.L. Reifsnider

Download or read book Fatigue of Composite Materials written by K.L. Reifsnider and published by Elsevier. This book was released on 2012-12-02 with total page 532 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book provides the first comprehensive review of its kind on the long-term behaviour of composite materials and structures subjected to time variable mechanical, thermal, and chemical influences, a subject of critical importance to the design, development, and certification of high performance engineering structures. Specific topics examined include damage, damage characterization, and damage mechanics; fatigue testing and evaluation; fatigue behaviour of short and long fibre reinforced polymer and metal matrix materials; viscoelastic and moisture effects; delamination; statistical considerations; the modeling of cumulative damage development; and life prediction. The volume provides an extensive presentation of data, discussions, and comparisons on the behaviour of the major types of material systems in current use, as well as extensive analysis and modeling (including the first presentation of work not found elsewhere). The book will be of special interest to engineers concerned with reliability, maintainability, safety, certification, and damage tolerance; to materials developers concerned with making materials for long-term service, especially under severe loads and environments, and to lecturers, students, and researchers involved in material system design, performance, solid mechanics, fatigue, durability, and composite materials. The scope of the work extends from entry level material to the frontiers of the subject.

American Society for Composites, Eighth Proceedings

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Publisher : CRC Press
ISBN 13 : 9781566761031
Total Pages : 1168 pages
Book Rating : 4.7/5 (61 download)

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Book Synopsis American Society for Composites, Eighth Proceedings by : American Society for Composites. Technical Conference

Download or read book American Society for Composites, Eighth Proceedings written by American Society for Composites. Technical Conference and published by CRC Press. This book was released on 1993-10-15 with total page 1168 pages. Available in PDF, EPUB and Kindle. Book excerpt: