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Author: Johannes Spahn
Publisher:
ISBN: 9783942695091
Category :
Languages : de
Pages : 0
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Book Description
Author: Johannes Spahn
Publisher:
ISBN: 9783942695091
Category :
Languages : de
Pages : 0
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Book Description
Author: Pengfei Liu
Publisher: Elsevier
ISBN: 0128209631
Category : Technology & Engineering
Languages : en
Pages : 396
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Book Description
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
Author: Pengfei Liu
Publisher: Elsevier
ISBN: 0323853536
Category : Technology & Engineering
Languages : en
Pages : 398
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Book Description
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
Author: Mohammadreza Bahadori
Publisher:
ISBN:
Category : Composite materials
Languages : en
Pages : 0
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Book Description
The reliable use of fiber reinforced composites (FRCs) in engineering applications depends, among other factors, on the quality of predictions related to their evolving damage state, which further affect design, operation and maintenance conditions. In this context, although a wealth of mechanical behavior, characterization, and failure data and information are available, it is still challenging to understand and predict the failure process in such materials. The main reasons for this deficiency are two. First, the failure processes in FRCs are fairly complex and highly variable given the available manufacturing, processing and usage parameters, which result in unique challenges when monitoring and simulating their performance. Second, despite the several modeling approaches developed using e.g. the Finite Element Analysis (FEA) method, it remains challenging to extend the use of such models across time and lengths scales. This dissertation targets the development of a data-driven modeling approach that is based on a key difference with respect to the previously reported methods on composite damage modeling. Specifically, instead of merely using a number of inputs for material and failure properties based on literature or some experiments, the presented approach targets to create computational workflows that enable the use of nondestructive evaluation data, collected at several scales to generate progressive failure inputs to FEA models, which are first calibrated for their predictions at the material scale and then use similar data to tune aspects of damage initiation and evolution at the structural scale. To demonstrate this approach, a particular class of FRCs is used and a number of analytical and numerical tools are developed or adapted to achieve this type of data-driven FEA modeling. The overall research output, demonstrates that such computational workflows are now possible to provide insights into progressive failure analysis of composite materials, which could impact all phases of design, manufacturing and use of them in applications.
Author: Young Kwon
Publisher: Springer Science & Business Media
ISBN: 0387363181
Category : Technology & Engineering
Languages : en
Pages : 634
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Book Description
This book presents the state-of-the-art in multiscale modeling and simulation techniques for composite materials and structures. It focuses on the structural and functional properties of engineering composites and the sustainable high performance of components and structures. The multiscale techniques can be also applied to nanocomposites which are important application areas in nanotechnology. There are few books available on this topic.
Author: Naake, Dominik Robert
Publisher: KIT Scientific Publishing
ISBN: 3731510057
Category : Technology & Engineering
Languages : en
Pages : 304
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Book Description
A weave reinforced composite material with a thermoplastic matrix is investigated by using a multiscale chain to predict the macroscopic material behavior. A large-strain framework for constitutive modeling with focus on material non-linearities, i.e. plasticity and damage is defined. The ability of the geometric and constitutive models to predict the deformation and failure behavior is demonstrated by means of selected examples.
Author: Elena Ferretti
Publisher: Momentum Press
ISBN: 1606506064
Category : Technology & Engineering
Languages : en
Pages : 282
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Book Description
The Cell Method (CM) is a computational tool that maintains critical multidimensional attributes of physical phenomena in analysis. This information is neglected in the differential formulations of the classical approaches of finite element, boundary element, finite volume, and finite difference analysis, often leading to numerical instabilities and spurious results. This book highlights the central theoretical concepts of the CM that preserve a more accurate and precise representation of the geometric and topological features of variables for practical problem solving. Important applications occur in fields such as electromagnetics, electrodynamics, solid mechanics and fluids. CM addresses non-locality in continuum mechanics, an especially important circumstance in modeling heterogeneous materials. Professional engineers and scientists, as well as graduate students, are offered: • A general overview of physics and its mathematical descriptions; • Guidance on how to build direct, discrete formulations; • Coverage of the governing equations of the CM, including nonlocality; • Explanations of the use of Tonti diagrams; and • References for further reading.
Author: Tomasz Sadowski
Publisher: Springer
ISBN: 9783211295588
Category : Technology & Engineering
Languages : en
Pages : 310
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Book Description
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: Saiphon Charoenphan
Publisher:
ISBN:
Category :
Languages : en
Pages : 200
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Book Description
Author: Shiguang Deng
Publisher:
ISBN: 9781267648990
Category : Composite materials
Languages : en
Pages : 129
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Book Description
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.
