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Computational Damage Model For Layered Composite Materials Numerical Modeling Of Dynamical Deforming Of Damageable Thermoviscoelastic Composite Shell In Internal Loading
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Book Synopsis Computational Damage Model for Layered Composite Materials: Numerical Modeling of Dynamical Deforming of Damageable Thermoviscoelastic Composite Shell in Internal Loading by :
Download or read book Computational Damage Model for Layered Composite Materials: Numerical Modeling of Dynamical Deforming of Damageable Thermoviscoelastic Composite Shell in Internal Loading written by and published by . This book was released on 1996 with total page 168 pages. Available in PDF, EPUB and Kindle. Book excerpt: This report results from a contract tasking Moscow State University as follows: The contractor will create a new mathematical model for dynamical deforming and failure of viscoelastic damageable unidirectional laminated composites as detailed in his proposal dated 28 Dec 95.
Book Synopsis Damage Modeling of Composite Structures by : Pengfei Liu
Download or read book Damage Modeling of Composite Structures written by Pengfei Liu and published by Elsevier. This book was released on 2021-03-10 with total page 398 pages. Available in PDF, EPUB and Kindle. Book excerpt: Damage Modeling of Composite Structures: Strength, Fracture, and Finite Element Analysis provides readers with a fundamental overview of the mechanics of composite materials, along with an outline of an array of modeling and numerical techniques used to analyze damage, failure mechanisms and safety tolerance. Strength prediction and finite element analysis of laminated composite structures are both covered, as are modeling techniques for delaminated composites under compression and shear. Viscoelastic cohesive/friction coupled model and finite element analysis for delamination analysis of composites under shear and for laminates under low-velocity impact are all covered at length. A concluding chapter discusses multiscale damage models and finite element analysis of composite structures. - Integrates intralaminar damage and interlaminar delamination under different load patterns, covering intralaminar damage constitutive models, failure criteria, damage evolution laws, and virtual crack closure techniques - Discusses numerical techniques for progressive failure analysis and modeling, as well as numerical convergence and mesh sensitivity, thus allowing for more accurate modeling - Features models and methods that can be seamlessly extended to analyze failure mechanisms and safety tolerance of composites under more complex loads, and in more extreme environments - Demonstrates applications of damage models and numerical methods
Book Synopsis Dynamic Deformation, Damage and Fracture in Composite Materials and Structures by : Vadim Silberschmidt
Download or read book Dynamic Deformation, Damage and Fracture in Composite Materials and Structures written by Vadim Silberschmidt and published by Woodhead Publishing. This book was released on 2016-01-23 with total page 618 pages. Available in PDF, EPUB and Kindle. Book excerpt: Composite materials, with their higher exposure to dynamic loads, have increasingly been used in aerospace, naval, automotive, sports and other sectors over the last few decades. Dynamic Deformation, Damage and Fracture in Composite Materials and Structures reviews various aspects of dynamic deformation, damage and fracture, mostly in composite laminates and sandwich structures, in a broad range of application fields including aerospace, automotive, defense and sports engineering. As the mechanical behavior and performance of composites varies under different dynamic loading regimes and velocities, the book is divided into sections that examine the different loading regimes and velocities. Part one examine low-velocity loading and part two looks at high-velocity loading. Part three then assesses shock and blast (i.e. contactless) events and the final part focuses on impact (contact) events. As sports applications of composites are linked to a specific subset of dynamic loading regimes, these applications are reviewed in the final part. - Examines dynamic deformation and fracture of composite materials - Covers experimental, analytical and numerical aspects - Addresses important application areas such as aerospace, automotive, wind energy and defence, with a special section on sport applications
Book Synopsis Modeling the Effect of Damage in Composite Structures by : Christos Kassapoglou
Download or read book Modeling the Effect of Damage in Composite Structures written by Christos Kassapoglou and published by John Wiley & Sons. This book was released on 2015-03-11 with total page 252 pages. Available in PDF, EPUB and Kindle. Book excerpt: Comprehensively covers new and existing methods for the design and analysis of composites structures with damage present Provides efficient and accurate approaches for analysing structures with holes and impact damage Introduces a new methodology for fatigue analysis of composites Provides design guidelines, and step by step descriptions of how to apply the methods, along with evaluation of their accuracy and applicability Includes problems and exercises Accompanied by a website hosting lecture slides and solutions
Book Synopsis Modeling Damage, Fatigue and Failure of Composite Materials by : Ramesh Talreja
Download or read book Modeling Damage, Fatigue and Failure of Composite Materials written by Ramesh Talreja and published by Elsevier. This book was released on 2023-09-23 with total page 620 pages. Available in PDF, EPUB and Kindle. Book excerpt: Modeling Damage, Fatigue and Failure of Composite Materials, Second Edition provides the latest research in the field of composite materials, an area that has attracted a wealth of research, with significant interest in the areas of damage, fatigue, and failure. The book is fully updated, and is a comprehensive source of physics-based models for the analysis of progressive and critical failure phenomena in composite materials. It focuses on materials modeling while also reviewing treatments for analyzing failure in composite structures. Sections review damage development in composite materials such as generic damage and damage accumulation in textile composites and under multiaxial loading. Part Two focuses on the modeling of failure mechanisms in composite materials, with attention given to fiber/matrix cracking and debonding, compression failure, and delamination fracture. Final sections examine the modeling of damage and materials response in composite materials, including micro-level and multi-scale approaches, the failure analysis of composite materials and joints, and the applications of predictive failure models. - Provides a comprehensive source of physics-based models for the analysis of progressive and critical failure phenomena in composite materials - Assesses failure and life prediction in composite materials - Discusses the applications of predictive failure models such as computational approaches to failure analysis - Covers further developments in computational analyses and experimental techniques, along with new applications in aerospace, automotive, and energy (wind turbine blades) fields - Covers delamination and thermoplastic-based composites
Book Synopsis An Isogeometric Analysis Framework for Progressive Damage Modeling of Multi-Layer Composite Materials by : Marco Simone Pigazzini
Download or read book An Isogeometric Analysis Framework for Progressive Damage Modeling of Multi-Layer Composite Materials written by Marco Simone Pigazzini and published by . This book was released on 2018 with total page 151 pages. Available in PDF, EPUB and Kindle. Book excerpt: Fiber-reinforced composite materials have become increasingly popular in the past few decades for lightweight applications, in particular in the aerospace industry where high strength-to-weight and high stiffness-to-weight ratio are considered key design parameters. At the same time, new computational technologies are required to support the design process of increasingly complex structural components and to predict damage growth under non-standard loading conditions. However, the development of accurate and computationally efficient analysis tools, capable of predicting the response of laminated composite structures from the elastic regime to the failure point and beyond, is a complex task. Difficulties stem from the inherent heterogeneous nature of fiber-reinforced polymer composite materials and from their multi-modal failure mechanisms. Composite structures optimized for low weight applications are often laminates, consisting of several layers of fiber-reinforced material, called laminae, bonded together. Intra-laminar damage may occur within a given lamina, and inter-laminar damage, or delamination, may occur when bonds between laminae break down. The unique challenges associated with modeling damage in these structures may be addressed by means of thin-shell formulations which is naturally developed in the context of Isogeometric Analysis. This dissertation presents a novel multi-layer modeling framework based on Isogeometric Analysis, where each ply or lamina is represented by a Non-Uniform Rational B-Spline (NURBS) surface, and it is modeled as a Kirchhoff-Love thin shell. A residual stiffness approach is used to model intra-laminar damage in the framework of Continuum Damage Mechanics. A new zero-thickness cohesive interface formulation is introduced to model delamination as well as permitting laminate-level transverse shear compliance. The gradient-enhanced continuum damage model is then introduced to regularize material instabilities, which are typically associated with strain-softening damage models. This nonlocal regularization technique aims to re-establish mesh objectivity by limiting the dependence of damage predictions on the choice of discrete mesh. To account for the anisotropic damage modes of laminae, the proposed formulation smooths a tensor-valued strain field by solving an elliptic partial differential equation system on each lamina. The proposed approach has significant accuracy and efficiency advantages over existing methods for modeling impact damage. These stem from the use of IGA-based Kirchhoff-Love shells to represent the individual plies of the composite laminate, while the compliant cohesive interfaces enable transverse shear deformation of the laminate. Kirchhoff-Love shells give a faithful representation of the ply deformation behavior, and, unlike solids or traditional shear-deformable shells, do not suffer from transverse-shear locking in the limit of vanishing thickness. This, in combination with higher-order accurate and smooth representation of the shell midsurface displacement field, allows to adopt relatively coarse in-plane discretizations without sacrificing solution accuracy. Furthermore, the thin-shell formulation employed does not use rotational degrees of freedom, which gives additional efficiency benefits relative to more standard shell formulations.
Book Synopsis A Thermodynamically Consistent Damage Model for Advanced Composites by : National Aeronaut Administration (Nasa)
Download or read book A Thermodynamically Consistent Damage Model for Advanced Composites written by National Aeronaut Administration (Nasa) and published by . This book was released on 2020-08-06 with total page 48 pages. Available in PDF, EPUB and Kindle. Book excerpt: Technical Report Maimi, Pere and Camanho, Pedro P. and Mayugo, Joan-Andreu and Davila, Carlos G. Langley Research Center NASA/TM-2006-214282, L-19239 COMPOSITE MATERIALS; DAMAGE; CONTINUUM MODELING; FIBER COMPOSITES; CRACK CLOSURE; DEGRADATION; LOADS (FORCES); PREDICTIONS; NUMERICAL ANALYSIS; MATHEMATICAL MODELS
Book Synopsis Computational Damage Model for Thermoviscoelastic Laminated Composites, Third Phase: Model Parameters Development by :
Download or read book Computational Damage Model for Thermoviscoelastic Laminated Composites, Third Phase: Model Parameters Development 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 present paper contains the model description for developing the damage parameters under the conditions of high rates of loading in impact experiments. The worked out methodology is illustrated on an example of processing the experimental results and spallation of organic materials to develop the critical dissipation energy. The results of the present investigations show that the dynamical wave pattern generated as a result of impact in the samples depends strongly on the damage parameters. Thus the entropy growth factors for the shear and tension as well as the breakup criterion - the critical value for the dissipation - could be developed. Those damage parameters for the organic glasses were developed based on an impact experiment.
Book Synopsis Damage and Fracture of Composite Materials and Structures by : Mohd Nasir Tamin
Download or read book Damage and Fracture of Composite Materials and Structures written by Mohd Nasir Tamin and published by Springer Science & Business Media. This book was released on 2012-01-05 with total page 244 pages. Available in PDF, EPUB and Kindle. Book excerpt: This monograph presents recent research findings on fracture properties and behavior of the composites, and their damage and cracking process under both quasi-static and impact loading conditions. Theoretical treatment, experimental investigation and numerical simulation aspects of the mechanics of composites, including sandwich structures are included.
Book Synopsis Multi-Scale Damage Modeling for Advanced Composite Materials by : Bazle Z. Haque
Download or read book Multi-Scale Damage Modeling for Advanced Composite Materials written by Bazle Z. Haque and published by Wiley. This book was released on 2015-02-02 with total page 220 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book covers multi-scale damage modeling of composite materials while expanding classical techniques to consider advanced fiber architectures such as woven textile composites. Classical methods are expanded to the analysis of thick-section composites which opens the regime to ballistic and low velocity impact applications. These analyses are inherently multi-scale in nature, as deformation and failure mechanisms involve multiple phenomena on several length scales. Nano and micro scale modeling utilizing molecular and dynamic (MD) and advanced fracture computational techniques (XFEM and cohesive element approaches) can be employed to determine the property enhancements and toughening effects of nanoparticulate and carbon nanotube reinforcements. Material-by-design approaches to composite material development will be achieved through modeling of representative microstructures at multiple length scales.
Book Synopsis Progressive Damage Modeling of Tensile Deformation of a Fiber Reinforced Composite Laminate Under Strain Rate Effects by : Shiguang Deng
Download or read book Progressive Damage Modeling of Tensile Deformation of a Fiber Reinforced Composite Laminate Under Strain Rate Effects written by Shiguang Deng and published by . This book was released on 2012 with total page 129 pages. Available in PDF, EPUB and Kindle. Book excerpt: Finite element modeling provides an efficient approach to simulate the mechanical behaviors of composite materials. Many finite element models were built to predict the mechanical responses of composite materials under the static loading conditions. Such static-loading models of composite materials were too modest to predict their behaviors under the dynamic loading process, say varying strain rates. In this thesis, we established both macromechanical and micromechanical finite element models to simulate the progressive damages of fiber reinforced composite materials under varying intermediate strain rates. With the application of the strain-rate-dependent composite properties, failure analysis and associated property degradations of failed composites, we were able to build a macromechanical finite element model to simulate the strain-rate-dependent mechanical behaviors of composite materials under intermediate strain rates. Through the comparison of our numerical results with experimental observations and modeling results reported in the literature, recommended values of mesh densities were presented and the correctness of our macromechanical mode was validated. The model was further developed with a multicontinuum theory (MCT). Based on the macromechanical model, a micromechanical model was developed to study the effects of a MCT-based constituent stress interactive failure criterion on the numerical results of a tensile test on a composite coupon with varying strain rates. The MCT is based on a constituent volume average procedure and was used to calculate the stress and strain states of every constituent within the composite. Based on the stress information of the constituents, associated failure criteria and degradation rules were presented for the model. By comparing the simulation results of the macromechanical and micromechanical models, we found some differences between them and further recommendations were given for modifying the present model to simulate the progressive damage dynamic responses of composite structures more precisely.
Book Synopsis Advances in Damage Mechanics: Metals and Metal Matrix Composites With an Introduction to Fabric Tensors by : George Voyiadjis
Download or read book Advances in Damage Mechanics: Metals and Metal Matrix Composites With an Introduction to Fabric Tensors written by George Voyiadjis and published by Elsevier. This book was released on 2010-07-07 with total page 741 pages. Available in PDF, EPUB and Kindle. Book excerpt: The book presents the principles of Damage Mechanics along with the latest research findings. Both isotropic and anisotropic damage mechanisms are presented. Various damage models are presented coupled with elastic and elasto-plastic behavior. The book includes two chapters that are solely dedicated to experimental investigations conducted by the authors. In its last chapter, the book presents experimental data for damage in composite materials that appear in the literature for the first time.· Systematic treatment of damage mechanics in composite materials· Includes special and advanced topics· Includes basic principles of damage mechanics· Includes new experimental data that appears in print for the first time· Covers both metals and metal matrix composite materials· Includes new chapters on fabric tensors· Second edition includes four new chapters
Book Synopsis A Computational-Experimental Approach to Hierarchical Modeling of Damage and Failure in Non-Uniform Composite Materials by :
Download or read book A Computational-Experimental Approach to Hierarchical Modeling of Damage and Failure in Non-Uniform Composite Materials written by and published by . This book was released on 2001 with total page 145 pages. Available in PDF, EPUB and Kindle. Book excerpt: Progress has been made in advancing the state of the art in multiple-scale modeling of damage in composite materials, as delineated below. Interfacial Debonding Analysis in Multiple Fiber Reinforced Composites: Decohesion at multiple fiber interfaces of elastic fiber reinforced composites is modeled by the Voronoi cell finite element model (VCFEM). Interfacial debonding is accommodated by cohesive zone models and simulations are compared with results from experiments, performed using cruciform specimens of fiber polymer-matrix composites. A Multi-level Computational Model for Multi-scale Damage Analysis in Composite and Porous Materials: An adaptive multi-level methodology is developed to create a hierarchy of computational sub-domains with varying resolution for multiple scale problems. It concurrently predicts variables at the structural and microstructural scales and tracks microstructural damage. VCFEM conducts microstructural analysis, while a displacement based FEM code executes the macroscopic analysis. The adaptive process increases efficiency and accuracy. Experimental-Computationai Investigation Of Damage Evolution In Discontinuously Reinforced Composite: A combined experimental-computational approach to study the evolution of microscopic damage to cause failure in commercial SiC particle reinforced DRA's. Aspects of microstructural geometry that are most critical for damage nucleation and evolution are accomplished. Micromechanical modeling of 2D micrographs are conducted with VCFEM. Inferences on the initiation and propagation of damage are made from the 2D simulations.
Book Synopsis Computational Modelling of Progressive Damage in Viscoelastic-viscoplastic Composite Materials by : Thomas John Berton
Download or read book Computational Modelling of Progressive Damage in Viscoelastic-viscoplastic Composite Materials written by Thomas John Berton and published by . This book was released on 2019 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Current governmental requirements for greater fuel efficiency are pushing automotive manufacturers to find innovative ways of reducing car weight, while still maintaining mechanical performance to ensure passenger safety. Composite materials would allow for significant weight reduction, while still maintaining a safe environment for the passengers. However, composite materials are known to exhibit significant time-dependent behaviour, as well as progressive damage which affect structural performance. Bio-composites in particular are known to undergo complex damage evolution during their lifetime. In this thesis, a multi-scale computational approach has been adopted to take these effects into account. A new modelling approach based on Synergistic Damage Mechanics to understand damage evolution in composite materials undergoing time-dependent deformation is developed. The model is applied to matrix micro-cracking in laminates. Computational micro-damage mechanics is combined with a continuum level description of stiffness degradation to predict the evolution of micro-cracking while requiring minimal experimental calibration. The time-dependent behaviour is modelled using Schapery's theory of viscoelasticity and viscoplasticity, and the evolution of matrix micro-cracking during creep is predicted. The predictions of the model for different stacking sequences, ply thicknesses and working temperatures show that viscoelasticity and viscoplasticity have a significant effect on the long-term response of laminates undergoing matrix micro-cracking. The multi-scale modelling approach is extended to short fiber bio-composites by constructing a micro-damage model of fiber-matrix debonding using a Cohesive Zone Model. The effect of strain rate on fiber-matrix debonding is analyzed by implementing a non-linear viscoelastic model for the matrix, and it is shown that viscoelastic behaviour leads to a competition between void nucleation and debonding. The effects of fiber stiffness, dimensions and interfacial shear strength are evaluated. Following the micro-damage analyses, the thesis focuses on damage evolution at the structural scale by implementing the damage model in Finite Element Analysis software to analyze the dynamic response of a car bumper. The rate-dependent evolution of damage is predicted for different stacking sequences and material systems.
Book Synopsis Damage Mechanics of Composite Materials: Constitutive Modeling and Computational Algorithms by :
Download or read book Damage Mechanics of Composite Materials: Constitutive Modeling and Computational Algorithms written by and published by . This book was released on 1991 with total page 106 pages. Available in PDF, EPUB and Kindle. Book excerpt: The present work is concerned with development of innovative damage mechanics models for constitutive modeling of modern composite materials. Special attention is focused on micromechanical damage theories to explain and model behavior of composites based on micromechanics and micro-geometry. In particular, basic studies are performed on the notion of isotropic and anisotropic damage variables in continuum damage mechanics. Furthermore, a micromechanical damage model is presented for uniaxially reinforced composites and is analytically derived based on micromechanical bi-material arc crack solutions. Finally, a novel three-dimensional statistical micromechanical theory is proposed to investigate the nonlinear behavior of microcrack-weakened brittle solids. The theory is fundamentally different from existing effective medium theories and deterministic microcrack interaction method.
Book Synopsis A Multiscale Computational Model for Predicting Damage Evolution in Viscoelastic Composites Subjected to Impact Loading by :
Download or read book A Multiscale Computational Model for Predicting Damage Evolution in Viscoelastic Composites Subjected to Impact Loading written by and published by . This book was released on 2005 with total page 31 pages. Available in PDF, EPUB and Kindle. Book excerpt: The objective of the project was to develop a multiscale computational model capable of predicting the evolution of matrix cracking, delamination, and fiber cracking in viscoelastic composite structures subjected to ballistic impact. The model is three dimensional and computational in nature, utilizing the finite element method, and this model is being implemented to the explicit code DYNA3D. Crack growth is simulated via the cohesive zone model currently under development by the author. The cohesive zone model for predicting damage evolution in laminated composite plates is cast within a three dimensional continuum finite element algorithm capable of simulating the evolution of matrix, fiber, and delamination cracking in composite structures subjected to ballistic impact. Cracking on vastly differing length scales is accounted for by employing global-local techniques, with appropriate damage dependent homogenization techniques introduced to bridge the disparate scales. Finally, simplified generic example problems were solved analytically and compared to computational results obtained with the model as a means of model verification. A damage constitutive model for polymer-matrix composite materials was developed and implemented into a commercially available finite element package.
Book Synopsis Multiscale Modelling of Damage and Fracture Processes in Composite Materials by : Tomasz Sadowski
Download or read book Multiscale Modelling of Damage and Fracture Processes in Composite Materials written by Tomasz Sadowski and published by Springer. This book was released on 2004-11-24 with total page 310 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.
