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Author : Erian A. Armanios
Publisher :
ISBN 13 :
Total Pages : pages
Book Rating : 4.:/5 (714 download)
Download or read book Analysis of Delamination Related Fracture Processes in Composites written by Erian A. Armanios and published by . This book was released on 1989 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : National Aeronautics and Space Administration (NASA)
Publisher : Createspace Independent Publishing Platform
ISBN 13 : 9781722083014
Total Pages : 50 pages
Book Rating : 4.0/5 (83 download)
Download or read book Analysis of Delamination Related Fracture Processes in Composites written by National Aeronautics and Space Administration (NASA) and published by Createspace Independent Publishing Platform. This book was released on 2018-06-30 with total page 50 pages. Available in PDF, EPUB and Kindle. Book excerpt: An anisotropic thin walled closed section beam theory was developed based on an asymptotical analysis of the shell energy functional. The displacement field is not assumed a priori and emerges as a result of the analysis. In addition to the classical out-of-plane torsional warping, two new contributions are identified namely, axial strain and bending warping. A comparison of the derived governing equations confirms the theory developed by Reissner and Tsai. Also, explicit closed form expressions for the beam stiffness coefficients, the stress and displacement fields are provided. The predictions of the present theory were validated by comparison with finite element simulation, other closed form analyses and test data. Armanios, Erian A. Unspecified Center NAG1-637; GIT PROJ. E16-654...
Author : National Aeronautics and Space Adm Nasa
Publisher : Independently Published
ISBN 13 : 9781792785238
Total Pages : 38 pages
Book Rating : 4.7/5 (852 download)
Download or read book Introduction to the Analysis of Delamination Related Fracture Processes in Composites written by National Aeronautics and Space Adm Nasa and published by Independently Published. This book was released on 2018-12-31 with total page 38 pages. Available in PDF, EPUB and Kindle. Book excerpt: This research concerns the analysis and prediction of delamination damage that occurs in composite structures on the sublaminate scale - that is, the scale of individual plies or groups of plies. The objective was to develop analytical models for fixed-mode delamination in composites. These include: (1) the influence of residual thermal and moisture strains; (2) local or transverse crack tip delamination originating at the tip of transverse matrix cracks; and (3) delamination in tapered composite under tensile loading. Computer codes based on the analytical models were developed and comparisons of predictions with available experimental and analytical results in the literature were performed. Armanios, Erian A. and Rehfield, Lawrence W. ...
Author : Leslie Banks-Sills
Publisher : Springer
ISBN 13 : 3319603272
Total Pages : 125 pages
Book Rating : 4.3/5 (196 download)
Download or read book Interface Fracture and Delaminations in Composite Materials written by Leslie Banks-Sills and published by Springer. This book was released on 2017-07-05 with total page 125 pages. Available in PDF, EPUB and Kindle. Book excerpt: Part I of this SpringerBrief presents the problem of a crack between two dissimilar isotropic materials and describes the mathematical background. A fracture criterion is discussed and Methods for calculating fracture parameters such as stress intensity factors using the finite element method and three post-processors are considered. Actual test data and both deterministic and statistical failure curves are presented.In Part II of the book, similar descriptions are given for delaminations in composite laminates. The mathematical treatment of this type of damage including the first term of the asymptotic expansion of the stress and displacement fields is considered. Numerical post-processors for determining stress intensity factors for these cases are reviewed. Two examples of specific laminates are presented: one with a failure curve and the other with a failure surface. Finally, beam specimens used for testing such failures are discussed.
Author : W. L. Bradley
Publisher :
ISBN 13 :
Total Pages : 267 pages
Book Rating : 4.:/5 (227 download)
Download or read book Fracture Physics of Delamination of Composite Materials written by W. L. Bradley and published by . This book was released on 1987 with total page 267 pages. Available in PDF, EPUB and Kindle. Book excerpt: Real time observations in the scanning electron microscope have delineated the details of the fracture processes that result in mode I and mode II delamination of composite materials. These observations give clear explanation of why GII/GIC ratio for brittle materials is three times that for ductile materials. These in situ observations of fracture also indicate that distinctively different damage zone develops ahead of growing cracks for mode I and mode II delamination. Two techniques have been developed to measure the strain field around a crack tip. Stero imaging and direct measurement of distortion of a fine array of dots placed on the surface. Both are effective in measuring the strain field around a crack tip. A surprising result which emerged from these measurements is that the local strain to failure at the crack tip is much greater than the elongation measured in a tensile test (up to six times as high). A linear, orthotropic finite element code has been used to calculate the stress fields around the crack tip for mode I and mode II loading. A J-integral approach for mode I has been used to investigate the delamination of multi directional composites. Initial results using this approach look very promising for characterizing systems which can not be characterized with conventional analysis.
Author : Tomasz Sadowski
Publisher : Springer Science & Business Media
ISBN 13 : 3211381023
Total Pages : 315 pages
Book Rating : 4.2/5 (113 download)
Download or read book Multiscale Modelling of Damage and Fracture Processes in Composite Materials written by Tomasz Sadowski and published by Springer Science & Business Media. This book was released on 2007-03-23 with total page 315 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book explores damage growth and fracture processes in cementitious, ceramic, polymer and metal matrix composites, integrating properties like stiffness and strength with observation at below macroscopic scale. Advances in multiscale modelling and analysis pertain directly to materials which either have a range of relevant microstructural scales, like metals, or do not have a well-defined microstructure, like cementitious or ceramic composites.
Author : Srinivasan Sridharan
Publisher : Elsevier
ISBN 13 : 1845694821
Total Pages : 787 pages
Book Rating : 4.8/5 (456 download)
Download or read book Delamination Behaviour of Composites written by Srinivasan Sridharan and published by Elsevier. This book was released on 2008-10-21 with total page 787 pages. Available in PDF, EPUB and Kindle. Book excerpt: Given such advantages as low weight compared to strength and toughness, laminated composites are now used in a wide range of applications. Their increasing use has underlined the need to understand their principal mode of failure, delamination. This important book reviews key research in understanding and preventing delamination. The first part of the book reviews general issues such as the role of fracture mechanics in understanding delamination, design issues and ways of testing delamination resistance. Part two describes techniques for detecting and characterising delamination such as piezoelectric sensors, the use of lamb waves and acoustic emission techniques. The next two sections of the book discuss ways of studying and modelling delamination behaviour. The final part of the book reviews research on delamination behaviour in particular conditions such as shell and sandwich structures, z-pin bridging and resin bonding. With its distinguished editor and international team of contributors, Delamination behaviour of composites is a standard reference for all those researching laminated composites and using them in such diverse applications as microelectronics, aerospace, marine, automotive and civil engineering. Reviews the role of fracture mechanics in understanding delamination, design issues and ways of testing delamination resistance Discuss ways of studying and modelling delamination behaviour A standard reference for all those researching laminated composites
Author :
Publisher :
ISBN 13 :
Total Pages : 500 pages
Book Rating : 4.X/5 (4 download)
Download or read book Scientific and Technical Aerospace Reports written by and published by . This book was released on 1995 with total page 500 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : J. D. Whitcomb
Publisher :
ISBN 13 :
Total Pages : 122 pages
Book Rating : 4.F/5 ( download)
Download or read book Analysis of Instability-related Growth of a Through-width Delamination written by J. D. Whitcomb and published by . This book was released on 1984 with total page 122 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Ronald Krueger
Publisher :
ISBN 13 :
Total Pages : 66 pages
Book Rating : 4.:/5 (317 download)
Download or read book The Virtual Crack Closure Technique: History, Approach and Applications written by Ronald Krueger and published by . This book was released on 2002 with total page 66 pages. Available in PDF, EPUB and Kindle. Book excerpt: An overview of the virtual crack closure technique is presented. The approach used is discussed, the history summarized, and insight into its applications provided. Equations for two-dimensional quadrilateral elements with linear and quadratic shape functions are given. Formula for applying the technique in conjuction with three-dimensional solid elements as well as plate/shell elements are also provided. Necessary modifications for the use of the method with geometrically nonlinear finite element analysis and corrections required for elements at the crack tip with different lengths and widths are discussed. The problems associated with cracks or delaminations propagating between different materials are mentioned briefly, as well as a strategy to minimize these problems. Due to an increased interest in using a fracture mechanics based approach to assess the damage tolerance of composite structures in the design phase and during certification, the engineering problems selected as examples and given as references focus on the application of the technique to components made of composite materials.
Author : Martin Knops
Publisher : Springer Science & Business Media
ISBN 13 : 3540757651
Total Pages : 208 pages
Book Rating : 4.5/5 (47 download)
Download or read book Analysis of Failure in Fiber Polymer Laminates written by Martin Knops and published by Springer Science & Business Media. This book was released on 2008-04-05 with total page 208 pages. Available in PDF, EPUB and Kindle. Book excerpt: Written by Puck's pupil and appointed successor Martin Knops, this book presents Alfred Puck ́s failure model, which, among several other theories, predicts fracture limits best and describes the failure phenomena in FRP most realistically – as confirmed within the "World-wide Failure Exercise". Using Puck ́s model the composite engineer can follow the gradual failure process in a laminate and deduce from the results of the analysis how to improve the laminate design.
Author : Walter L. Bradley
Publisher :
ISBN 13 :
Total Pages : 183 pages
Book Rating : 4.:/5 (227 download)
Download or read book Delamination Fracture in Graphite/Epoxy Materials written by Walter L. Bradley and published by . This book was released on 1986 with total page 183 pages. Available in PDF, EPUB and Kindle. Book excerpt: Contents: Objectives; Summary Work Statement; Summary of Accomplishments by Areas in Work Statement: In-situ Fracture Observations, Crack tip Strain Field Measurements, Fracture Mechanics Characterization, Micromechanics Modeling, Fractography and Failure Analysis, Publications Resulting in Whole or in Part from Work Supported by AFOSR; Professional Personnel Associated with Research Effort; Presentations; Summary of Significance of Accomplishments; Papers: Micromechanics of Fracture in Toughened Graphite/Epoxy Laminates, A Comparison of the Crack Tip Damage Zone for Fracture of Hexcell F185 Neat Resin and T6C145/F185 Composite, The Relationship of Resin Ductility and Composite Delamination, Delamination Analysis of Composites with Distributed Damage using a J integral, Correlation Between Micromechanical Failure Processes and the Delamination Fracture Toughness of Graphite/Epoxy Composite, The Meaning and Significance of Hackles in Composite Materials Failure Analysis.
Author : Soheil Mohammadi
Publisher : John Wiley & Sons
ISBN 13 : 1118443381
Total Pages : 1 pages
Book Rating : 4.1/5 (184 download)
Download or read book XFEM Fracture Analysis of Composites written by Soheil Mohammadi and published by John Wiley & Sons. This book was released on 2012-08-27 with total page 1 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book describes the basics and developments of the new XFEM approach to fracture analysis of composite structures and materials. It provides state of the art techniques and algorithms for fracture analysis of structures including numeric examples at the end of each chapter as well as an accompanying website which will include MATLAB resources, executables, data files, and simulation procedures of XFEM. The first reference text for the extended finite element method (XFEM) for fracture analysis of structures and materials Includes theory and applications, with worked numerical problems and solutions, and MATLAB examples on an accompanying website with further XFEM resources Provides a comprehensive overview of this new area of research, including a review of Fracture Mechanics, basic through to advanced XFEM theory, as well as current problems and applications Includes a chapter on the future developments in the field, new research areas and possible future applications of the method
Author : G. P. Sendeckyj
Publisher : ASTM International
ISBN 13 : 9780803103665
Total Pages : 248 pages
Book Rating : 4.1/5 (36 download)
Download or read book Fracture Mechanics of Composites written by G. P. Sendeckyj and published by ASTM International. This book was released on 1975 with total page 248 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : P. P. Camanho
Publisher :
ISBN 13 :
Total Pages : 26 pages
Book Rating : 4.:/5 (317 download)
Download or read book Numerical Simulation of Delamination Growth in Composite Materials written by P. P. Camanho and published by . This book was released on 2001 with total page 26 pages. Available in PDF, EPUB and Kindle. Book excerpt: The use of decohesion elements for the simulation of delamination in composite materials is reviewed. The test methods available to measure the interfacial fracture toughness used in the formulation of decohesion elements are described initially. After a brief presentation of the virtual crack technique most widely used to simulate delamination growth, the formulation of interfacial decohesion elements is described. Problems related with decohesion element constitutive equations, mixed-mode crack growth, element numerical integration and solution procedures are discussed. Based on these investigations, it is concluded that the use of interfacial decohesion elements is a promising technique that avoids the need for a pre-existing crack and pre-interfacial decohesion elements is a promising technique that avoids the need for a pre-existing crack and predefined crack paths, and that these elements can be used to simulate both delamination onset and growth.
Author : T. Kevin O'Brien
Publisher : ASTM International
ISBN 13 : 0803114192
Total Pages : 831 pages
Book Rating : 4.8/5 (31 download)
Download or read book Composite Materials written by T. Kevin O'Brien and published by ASTM International. This book was released on 1991 with total page 831 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Golam Newaz
Publisher : CRC Press
ISBN 13 :
Total Pages : 508 pages
Book Rating : 4.F/5 ( download)
Download or read book Delamination in Advanced Composites written by Golam Newaz and published by CRC Press. This book was released on 1991-02-22 with total page 508 pages. Available in PDF, EPUB and Kindle. Book excerpt:
