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Book Hybrid Finite Element Method for Stress Analysis of Laminated Composites

Download or read book Hybrid Finite Element Method for Stress Analysis of Laminated Composites written by Suong Van Hoa and published by Springer Science & Business Media. This book was released on 2013-11-27 with total page 304 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book has one single purpose: to present the development of the partial hybrid finite element method for the stress analysis of laminated composite structures. The reason for this presentation is because the authors believe that partial hybrid finite element method is more efficient that the displacement based finite element method for the stress analysis oflaminated composites. In fact, the examples in chapter 5 of this book show that the partial hybrid finite element method is about 5 times more efficient than the displacement based finite element method. Since there is a great need for accurate and efficient calculation of interlaminar stresses for the design using composites, the partial hybrid finite method does provide one possible solution. Hybrid finite method has been in existence since 1964 and a significant amount of work has been done on the topic. However, the authors are not aware of any systematic piece of literature that gives a detailed presentation of the method. Chapters of the displacement finite element method and the evolution 1 and 2 present a sununary of the hybrid finite element method. Hopefully, these two chapters can provide the readers with an appreciation for the difference between the displacement finite element method and the hybrid finite element. It also should prepare the readers for the introduction of partial hybrid finite element method presented in chapter 3.

Book Finite Element Analysis of Composite Laminates

Download or read book Finite Element Analysis of Composite Laminates written by O.O. Ochoa and published by Springer Science & Business Media. This book was released on 2013-06-29 with total page 222 pages. Available in PDF, EPUB and Kindle. Book excerpt: Composite materials are increasingly used in aerospace, underwater, and automotive structures. To take advantage of the full potential of composite materials, structural analysts and designers must have accurate mathematical models and design methods at their disposal. The objective of this monograph is to present the laminated plate theories and their finite element models to study the deformation, strength and failure of composite structures. Emphasis is placed on engineering aspects, such as the analytical descriptions, effective analysis tools, modeling of physical features, and evaluation of approaches used to formulate and predict the response of composite structures. The first chapter presents an overview of the text. Chapter 2 is devoted to the introduction of the definitions and terminology used in composite materials and structures. Anisotropic constitutive relations and Iaminate plate theories are also reviewed. Finite element models of laminated composite plates are presented in Chapter 3. Numerical evaluation of element coefficient matrices, post-computation of strains and stresses, and sample examples of laminated plates in bending and vibration are discussed. Chapter 4 introduces damage and failure criteria in composite laminates. Finally, Chapter 5 is dedicated to case studies involving various aspects and types of composite structures. Joints, cutouts, woven composites, environmental effects, postbuckling response and failure of composite laminates are discussed by considering specific examples.

Book Development of Partial Hybrid Finite Elements for 3 D Global local Analysis of Laminated Composite Structures

Download or read book Development of Partial Hybrid Finite Elements for 3 D Global local Analysis of Laminated Composite Structures written by Wei Feng and published by . This book was released on 1998 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: The purpose of this work is to develop global/local finite element models using partial hybrid stress finite elements for stress analysis of laminated composite structures. Based on the composite variational principle, the general formulations of partial hybrid single-layer finite element and multilayer finite element are presented. These formulations can be used to develop a series of partial hybrid finite elements. A 4-node degenerated plate element, an 8-node degenerated plate element, a 3-D, 8-node solid element, a 3-D, 20-node solid element, a 6-node transition element, a 15-node transition element, a multilayer solid element, and a multilayer transition element are presented. The elements developed in this thesis are examined by the, eigenvalue test to detect zero-energy deformation modes and the absence of rigid-body motion capability. The results show that the elements do not have any kinematic deformation modes, and they have a desired capability for rigid-body displacement. In addition, the non-zero eigenvalues of the element stiffness matrices are real and positive. In order to determine the optimal partial stress fields for the partial hybrid elements, a classification method of stress modes is presented. The method can be used to classify stress modes, select optimal stress modes, and set up an assumed stress matrix for a hybrid element. Also, the necessary and sufficient condition for avoiding spurious kinematic deformation mode is proposed and the optimal condition of an assumed stress field is presented. A computer program COMSA is developed to implement the partial hybrid finite element method. The Global/Local finite element models are established using plate element, solid element, and transition element. In the thesis, a few numerical examples are presented to verify the accuracy and efficiency of the finite element models. It has been shown that the global/local models using partial hybrid element are efficient and accurate for stress analysis of laminated composites due to the fact that they take advantage of the capacity of both 3-D elements and 2-D elements.

Book Hybrid and Incompatible Finite Element Methods

Download or read book Hybrid and Incompatible Finite Element Methods written by Theodore H.H. Pian and published by CRC Press. This book was released on 2005-11-04 with total page 395 pages. Available in PDF, EPUB and Kindle. Book excerpt: While the theory and application of finite elements methods can be extended to incompatible, hybrid, and mixed element methods, important issues, such as determining the reliability of the solution of incompatible multivariable elements, along with a common perception of impracticality, have hindered the widespread implementation of these methods. Today, however, recent advances--many directly attributable to these authors--have allowed the development of the stability theory and abstract mathematics to useful tools. Hybrid and Incompatible Finite Element Methods introduces these advances in the theory and applications of incompatible and multivariable finite element methods. After an overview of the variation formulation of finite element methods in solid mechanics, the authors discuss the fundamental theory and systematically demonstrate the theoretical foundations of incompatible elements and their application to different problems in the theory of elasticity. They also introduce new ideas in the development of hybrid finite elements, study the numerical stability of the hybrid and mixed element, and establish the theory of zero energy deformation modes. The final chapters, explore applications to fracture problems, present a bound analysis for fracture parameters, and demonstrate an implementation of a finite element analysis program.

Book Advanced Finite Element Method in Structural Engineering

Download or read book Advanced Finite Element Method in Structural Engineering written by Yu-Qiu Long and published by Springer Science & Business Media. This book was released on 2009-09-29 with total page 715 pages. Available in PDF, EPUB and Kindle. Book excerpt: Advanced Finite Element Method in Structural Engineering systematically introduces the research work on the Finite Element Method (FEM), which was completed by Prof. Yu-qiu Long and his research group in the past 25 years. Seven original theoretical achievements - for instance, the Generalized Conforming Element method, to name one - and their applications in the fields of structural engineering and computational mechanics are discussed in detail. The book also shows the new strategies for avoiding five difficulties that exist in traditional FEM (shear-locking problem of thick plate elements; sensitivity problem to mesh distortion; non-convergence problem of non-conforming elements; accuracy loss problem of stress solutions by displacement-based elements; stress singular point problem) by utilizing foregoing achievements.

Book Analysis and Modelling of Advanced Structures and Smart Systems

Download or read book Analysis and Modelling of Advanced Structures and Smart Systems written by Holm Altenbach and published by Springer. This book was released on 2017-11-27 with total page 380 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book presents selected papers presented at the 8th International Conference "Design, Modeling and Experiments of Advanced Structures and Systems" (DeMEASS VIII, held in Moscow, Russia in May 2017) and reflects the modern state of sciences in this field. The contributions contain topics like Piezoelectric, Ferroelectric, Ferroelastic and Magnetostrictive Materials, Shape Memory Alloys and Active Polymers, Functionally Graded Materials, Multi-Functional Smart Materials and Structures, Coupled Multi-Field Problems, Design and Modeling of Sensors and Actuators, Adaptive Structures.

Book Finite Element Modelling of Composite Materials and Structures

Download or read book Finite Element Modelling of Composite Materials and Structures written by F L Matthews and published by Elsevier. This book was released on 2000-10-27 with total page 225 pages. Available in PDF, EPUB and Kindle. Book excerpt: Finite element modelling of composite materials and structures provides an introduction to a technique which is increasingly being used as an analytical tool for composite materials.The text is presented in four parts: - Part one sets the scene and reviews the fundamentals of composite materials together with the basic nature of FRP and its constituents. Two-dimensional stress-strain is covered, as is laminated plated theory and its limitations. - Part two reviews the basic principles of FE analysis, starting with underlying theoretical issues and going on to show how elements are derived, a model is generated and results are processed. - Part three builds on the basics of FE analysis and considers the particular issues that arise in applying finite elements to composites, especially to the layered nature of the material. - Part four deals with the application of FE to FRP composites, presenting analytical models alongside FE representations. Specific issues addressed include interlaminar stresses, fracture delamination, joints and fatigue.This book is invaluable for students of materials science and engineering, and for engineers and others wishing to expand their knowledge of structural analysis. - Covers important work on finite element analysis of composite material performance - Based on material developed for an MSc course at Imperial College, London, UK - Covers particular problems such as holes, free edges with FE results compared with experimental data and classical analysis

Book Linear Dynamic Analyses of Laminated Plates and Shells by the Hybrid Stress Finite Element Method

Download or read book Linear Dynamic Analyses of Laminated Plates and Shells by the Hybrid Stress Finite Element Method written by Sheng-Taur Mau and published by . This book was released on 1973 with total page 232 pages. Available in PDF, EPUB and Kindle. Book excerpt: Ian, Theodore H.H. ;ASRL-TR-172-2DAAG46-73-C-0090DA-1-B-062113-A-661AMMRCCTR-73-40*Shells(Structural forms), *Plates, *Stresses, Composite materials, Laminates, Structural properties, Thermal stresses, Shear stresses, Deformation, Computer programs, Graphics, Curve fitting, Numerical integration, FORTRAN*Finite element analysis, *Structural analysis, FORTRAN 4 programming languageTwo methods of analyzing laminated- composite, linear-elastic plate and shell structures under transient mechanical and/or thermal loadings have been developed based on the hybrid-stress finite-element model. The computer codes corresponding to these two methods were also devel-oped and tested. Both programs are capable of treating thin or thick plates and shell structures. Shells with branches and cutouts can be treated. The outputs of the present computer programs are designed such that they can be easily adapted to any of the existing criteria for the strength of laminated composites. A SURVEY OF SUCH CRITERIA IS PRESENTED. (Author, modified-PL).

Book Hybrid Finite Element Analysis of Free Edge Effect in Symmetric Composite Laminates

Download or read book Hybrid Finite Element Analysis of Free Edge Effect in Symmetric Composite Laminates written by S. W. Lee and published by . This book was released on 1983 with total page 62 pages. Available in PDF, EPUB and Kindle. Book excerpt: The analytical study of the nature of interlaminar stresses near stress free edges has been the subject of substantial research interest. Such studies are significant because the high interlaminar stresses or stress singularities near stress-free edges may cause delamination failure as shown by experimental investigations. Also the accurate prediction of these stresses may be useful in the design of test specimens for investigation of laminate strength. One of the first analytical studies on interlaminar stresses near stress-free edges was published by Pipes and Pagano. In their study, finite difference technique was applied to a symmetric finite-width composite laminate subjected to uniform uniaxial strain. Subsequently other techniques were used to solve similar problems.

Book CANCOM 2001 Proceedings of the 3rd Canadian International Conference on Composites

Download or read book CANCOM 2001 Proceedings of the 3rd Canadian International Conference on Composites written by S.V. Hoa and published by CRC Press. This book was released on 2020-12-17 with total page 822 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book contains technical papers, presented at the third Canadian International Conference on Composites held in Canada in 2001, on topics including liquid composite molding, process modelling, virtual manufacturing, novel materials and processes, and metal matrix composites.

Book Advances in Heterogeneous Material Mechanics 2008

Download or read book Advances in Heterogeneous Material Mechanics 2008 written by Jinghong Fan and published by DEStech Publications, Inc. This book was released on 2008 with total page 1757 pages. Available in PDF, EPUB and Kindle. Book excerpt: "The International Conference on Heterogeneous Material Mechanics (ICHMM) in Huangshan, China, June 3-8, 2008 follows the successful inaugural ICHMM held in ChongQing, China in June, 2004. The ICHMM series is the first international forum that focuses exclusively on various issues related to the behavior of heterogeneous materials in a broad sense. The object of the ICHMM is to present and publicize integrated scientific and engineering approaches to the measurement and modeling of phenomena at the interface of materials science, physics, chemistry, biology, and solid mechanics."--Preface, p. xxxix.

Book Structural Analysis Systems

Download or read book Structural Analysis Systems written by A. Niku-Lari and published by Elsevier. This book was released on 2016-06-06 with total page 245 pages. Available in PDF, EPUB and Kindle. Book excerpt: Structural Analysis Systems: Software—Hardware Capability—Compatibility—Applications, Volume 2 is a practical guidebook on structural analysis systems and their applications. It provides detailed information about a specific software, its postprocessor capabilities and limitations, computer-aided design connection, and compatibility with the most common computers. Several practical examples from industry with computer and user cost are given. This volume consists of 17 chapters and begins with a description of AFAG, a dual finite element analysis program based on the flexibility method. The discussion then turns to the AQUADYN system, designed primarily to reduce the hydrodynamics problem to a linear integral equation for large floating or immersed structures. The following chapters focus on other structural analysis computer programs such as BOSOR4 and BOSOR5, INFESA, MEF/MOSAIC, RCAFAG, and STRUGEN. Some general purpose and special purpose finite element programs used for stress analysis of composite materials are also considered. This book will be a useful resource for practitioners in scientific and industrial disciplines such as mechanical or civil engineering, informatics, applied mathematics, and computer science.

Book The finite element method in the 1990 s

Download or read book The finite element method in the 1990 s written by Eugenio Onate and published by Springer Science & Business Media. This book was released on 2013-11-11 with total page 632 pages. Available in PDF, EPUB and Kindle. Book excerpt: Edited on the occasion of Prof. Olgierd C. Zienkiewicz' 70th birthday, this book contains original contributions from eminent scientists dealing with a wide range of theoretical aspects of the Finite Element Method and its application to a variety of engineering problems. The book provides an overview of the state-of-the-art of finite element technology in the last decade of the 20th century.