Global-local Progressive Failure Analysis of Composite Panels Including Skin-stringer Debonding and Intralaminar Damage PDF Download
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Author: Margarita Akterskaia
Publisher:
ISBN:
Category :
Languages : en
Pages : 0
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Author: Margarita Akterskaia
Publisher:
ISBN:
Category :
Languages : en
Pages : 0
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Author: Nicholas Fantuzzi
Publisher: Società Editrice Esculapio
ISBN: 8893850419
Category : Technology & Engineering
Languages : en
Pages : 352
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Book Description
Composite materials have aroused a great interest over the last few decades, as proven by the huge number of scientific papers and industrial progress. The increase in the use of composite structures in different engineering practices justify the present international meeting where researches from every part of the globe can share and discuss the recent advancements regarding the use of structural components within advanced applications such as buckling, vibrations, repair, reinforcements, concrete, composite laminated materials and more recent metamaterials. Studies about composite structures are truly multidisciplinary and the given contributions can help other researches and professional engineers in their own field. This Conference is suitable as a reference for engineers and scientists working in the professional field, in the industry and the academia and it gives the possibility to share recent advancements in different engineering practices to the outside world. This book aims to collect selected plenary and key-note lectures of this International Conference. For this reason, the establishment of this 20th edition of International Conference on Composite Structures has appeared appropriate to continue what has been begun during the previous editions. ICCS wants to be an occasion for many researchers from each part of the globe to meet and discuss about the recent advancements regarding the use of composite structures, sandwich panels, nanotechnology, bio-composites, delamination and fracture, experimental methods, manufacturing and other countless topics that have filled many sessions during this conference. As a proof of this event, which has taken place in Paris (France), selected plenary and key-note lectures have been collected in the present book.
Author: Antonio J.M. Ferreira
Publisher: Società Editrice Esculapio
ISBN: 8893850796
Category : Technology & Engineering
Languages : en
Pages : 160
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Book Description
It is well-known that the topic of composite mate- rials affects many engineering fields, such as civil, mechanical, aerospace, automotive and chemical. In the last decades, in fact, a huge number of scientific papers concerning these peculiar constituents has been published. Analogously, the industrial progress has been extremely noticeable. The study of composite materials, in general, is a challenging activity since the advancements both in the academia and in the industry provide continually new sparks to develop innovative ideas and applications. The communication, the sharing and the exchange of views can surely help the works of many researchers. This aspect represents the main purpose of this Conference, which aims to collect high-level contributions on the development and the application of composite materials. The establishment of this 21st edition of International Conference on Composite Structures has appeared appropriate to continue what has been begun during the previous editions. ICCS wants to be an occasion for many researchers from each part of the globe to meet and discuss about the recent advancements regarding the use of composite structures, sandwich panels, nanotechnology, bio-composites, delamination and fracture, experimental methods, manufacturing and other countless topics that have filled many sessions during this conference. As a proof of this event, which has taken place in Bologna (Italy), selected plenary and key-note lectures have been collected in the present book.
Author: Marco Petrolo
Publisher: Springer
ISBN: 3030119696
Category : Science
Languages : en
Pages : 198
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Book Description
This book gathers contributions addressing issues related to the analysis of composite structures, whose most relevant common thread is augmented numerical efficiency, which is more accurate for given computational costs than existing methods and methodologies. It first presents structural theories to deal with the anisotropy of composites and to embed multifield and nonlinear effects to extend design capabilities and provide methods of augmenting the fidelity of structural theories and lowering computational costs, including the finite element method. The second part of the book focuses on damage analysis; the multiscale and multicomponent nature of composites leads to extremely complex failure mechanisms, and predictive tools require physics-based models to reduce the need for fitting and tuning based on costly and lengthy experiments, and to lower computational costs; furthermore the correct monitoring of in-service damage is decisive in the context of damage tolerance. The third part then presents recent advances in embedding characterization and manufacturing effects in virtual testing. The book summarizes the outcomes of the FULLCOMP (FULLy integrated analysis, design, manufacturing, and health-monitoring of COMPosite structures) research project.
Author: Stephen Spottswood
Publisher:
ISBN: 9781423546351
Category :
Languages : en
Pages : 187
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Book Description
The objective of this research was to determine the physical response, including material failure, of a curved composite panel designed to resist transverse loading. The cause of the material failure, in the form of delamination, fiber and/or matrix failure, was determined through various criterion based on non-linear movement using a finite element analysis technique. Data generated both with and without the addition of progressive failure criteria, was compared with previously published experimental data, noting where the theory diverges from the experimental results. The inclusion of various failure criterion, to include maximum stress, Lee, and Hashin, provided a more realistic representation of the total physical response of the shell. Once an approximate range of accurate physical representation was realized, progressive failure of composite sandwich shells under transverse loading were examined. Results of the analytic comparison with the published experimental data indicate that the SLR theory overpredicts the stiffness of the various shells for both the cases considering and not considering failure criteria. Furthermore, matrix failure patterns predicted by all three criterion were similar to the experimental results. Core failures predicted in the composite sandwich analysis were similar between the failure criterion.
Author: Ronald Krueger
Publisher:
ISBN:
Category :
Languages : en
Pages : 66
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Book Description
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: PJ. Minguet
Publisher:
ISBN:
Category : Bond strength
Languages : en
Pages : 20
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Book Description
A simple test specimen configuration is proposed to evaluate the bond strength between a skin and secondarily bonded or co-cured stringer or frame when the dominant loading in the skin is flexure along the edge of the frame. The specimen consists of a flange bonded onto a skin, loaded either in a three- or four-point bending test fixture. Two configurations for the flange termination were examined, either square-ended or with a 20° taper. Observations show that failure initiates at the tip of the frame flange, either in the adhesive or in the topmost skin ply. Loads at which failure initiates were recorded, as well as the load at which a delamination propagates along the skin/flange interface. Detailed finite element models were built to examine the stress distribution in that critical area. Two failure modes were considered, failure in the adhesive material due to maximum tensile stress and formation of transverse cracks in the skin topmost ply due to maximum transverse principal tensile stress. When applying the experimentally measured failure initiation loads onto the finite element models, results show that the calculated transverse stress in the top skin ply is very close to the transverse strength of a unidirectional tape ply for all the configurations tested. Results also show that the stress levels in the adhesive are almost identical for all the configurations tested.
Author: Wojciech Pietraszkiewicz
Publisher: CRC Press
ISBN: 0203859766
Category : Technology & Engineering
Languages : en
Pages : 361
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Book Description
Shell Structures. Theory and Applications, Volume 2 contains 77 contributions from over 17 countries, reflecting a wide spectrum of scientific and engineering problems of shell structures. The papers are divided into six broad groups: 1. General lectures; 2. Theoretical modeling; 3. Stability; 4. Dynamics; 5. Numerical analysis; 6. Engineering
Author: Stephen Michael Spottswood (LT, USAF.)
Publisher:
ISBN:
Category :
Languages : en
Pages : 344
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Book Description
Author: National Aeronautics and Space Administration (NASA)
Publisher: Createspace Independent Publishing Platform
ISBN: 9781720666790
Category :
Languages : en
Pages : 26
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Book Description
Progressive failure analyses results are presented for composite panels with and without a cutout and subjected to in-plane shear loading and compression loading well into their postbuckling regime. Ply damage modes such as matrix cracking, fiber-matrix shear, and fiber failure are modeled by degrading the material properties. Results from finite element analyses are compared with experimental data. Good agreement between experimental data and numerical results are observed for most structural configurations when initial geometric imperfections are appropriately modeled.Jaunky, Navin and Ambur, Damodar R. and Davila, Carlos G. and Hilburger, Mark and Bushnell, Dennis M. (Technical Monitor)Langley Research CenterCOMPOSITE STRUCTURES; FAILURE ANALYSIS; BUCKLING; DYNAMIC STRUCTURAL ANALYSIS; COMPRESSION LOADS; FINITE ELEMENT METHOD; FIBER-MATRIX INTERFACES
