Download or read book Artificial Neural Networks in Continuum Micromechanics written by Alexander Henkes and published by . This book was released on 2022 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Artifical Neural Networks in Continuum Micromechanics written by Alexander Henkes and published by . This book was released on 2022 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Applications of Artificial Neural Networks in Structural Engineering with Emphasis on Continuum Models written by National Aeronautics and Space Adm Nasa and published by Independently Published. This book was released on 2018-11-10 with total page 120 pages. Available in PDF, EPUB and Kindle. Book excerpt: The use of continuum models for the analysis of discrete built-up complex aerospace structures is an attractive idea especially at the conceptual and preliminary design stages. But the diversity of available continuum models and hard-to-use qualities of these models have prevented them from finding wide applications. In this regard, Artificial Neural Networks (ANN or NN) may have a great potential as these networks are universal approximators that can realize any continuous mapping, and can provide general mechanisms for building models from data whose input-output relationship can be highly nonlinear. The ultimate aim of the present work is to be able to build high fidelity continuum models for complex aerospace structures using the ANN. As a first step, the concepts and features of ANN are familiarized through the MATLAB NN Toolbox by simulating some representative mapping examples, including some problems in structural engineering. Then some further aspects and lessons learned about the NN training are discussed, including the performances of Feed-Forward and Radial Basis Function NN when dealing with noise-polluted data and the technique of cross-validation. Finally, as an example of using NN in continuum models, a lattice structure with repeating cells is represented by a continuum beam whose properties are provided by neural networks. Kapania, Rakesh K. and Liu, Youhua Langley Research Center NEURAL NETS; STRUCTURAL ENGINEERING; AEROSPACE ENGINEERING; CONTINUUM MODELING; STRUCTURAL ANALYSIS; AIRCRAFT STRUCTURES; ALGORITHMS; NETWORK ANALYSIS...
Download or read book Recent Developments in Structural Engineering Volume 1 written by Manmohan Dass Goel and published by Springer Nature. This book was released on with total page 667 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Continuum Scale Simulation of Engineering Materials written by Dierk Raabe and published by John Wiley & Sons. This book was released on 2004-08-06 with total page 904 pages. Available in PDF, EPUB and Kindle. Book excerpt: Die Simulation von Materialien gehört zu den interessantesten neuen Forschungsgebieten der Ingenieurwissenschaften. Dieser Band spricht alle wichtigen Aspekte des Themas an, von den mathematischen Grundlagen der Simulation über Anwendungen beim Design von Mikrostrukturen bis zur computergestützten Werkstoffauswahl und -entwicklung. Doktoranden und Praktiker aus Materialwissenschaft und Technik lernen, aus den existierenden Simulationsmethoden den für ihr Problem am besten geeigneten Ansatz auszuwählen.
Download or read book Multi Scale Approaches to Continuum Approximations to Many Particle Systems and Loss Functions for Neural Networks written by Robert Creese and published by . This book was released on 2022 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Systems of interacting particles lead to interesting phenomena such as fish forming schools, flocks of birds, and ants marching in a line. In addition machine learning is a quickly growing field in which mathematics can be applied to the new concepts developed as well as used to create new branches. Both of these topics have seen the use of mathematics and modeling to explain the behavior of systems in both topics. In this dissertation we begin by studying a system of interacting particles with random initial conditions. We then consider continuum approximations of the system, based on truncations of the Bogoliubov-Born-Green-Kirkwood-Yvon (BBGKY) hierarchy, including the Mean Field Approximation (MFA), the Kirkwood Superposition Approximation (KSA), and a recently developed truncation of the BBGKY hierarchy (the Truncation Approximation - TA). Comparing numerical approaches for approximating the solutions we show that TA is more computationally efficient and more stable than KSA, while still able to capture the effects of correlations. The next thrust of this work focus on the classification problem in machine learning. A novel two-scale loss function is proposed to train neural networks. The introduced method is compatible not only with any gradient descent method, but for a wide variety of algorithms including traditional feed-forward neural networks as well as recurrent neural networks and including support vector machines. This two-scale loss function focuses the training of the neural network onto objects which are not well classified. We demonstrate that this leads to an increase for several measures of performance when compared to a traditional single-scale cross-entropy loss on the MNIST, CIFAR10, and CIFAR100 data-sets.
Download or read book Deep material networks for efficient scale bridging in thermomechanical simulations of solids written by Gajek, Sebastian and published by KIT Scientific Publishing. This book was released on 2023-08-25 with total page 326 pages. Available in PDF, EPUB and Kindle. Book excerpt: We investigate deep material networks (DMN). We lay the mathematical foundation of DMNs and present a novel DMN formulation, which is characterized by a reduced number of degrees of freedom. We present a efficient solution technique for nonlinear DMNs to accelerate complex two-scale simulations with minimal computational effort. A new interpolation technique is presented enabling the consideration of fluctuating microstructure characteristics in macroscopic simulations.
Download or read book Computational and Experimental Mechanics of Advanced Materials written by Vadim V. Silberschmidt and published by Springer Science & Business Media. This book was released on 2009-11-24 with total page 264 pages. Available in PDF, EPUB and Kindle. Book excerpt: Advanced materials play a crucial role in modern engineering applications where they are often exposed to complex loading and environmental conditions. In many cases, new approaches are needed to characterise these materials and to model their behaviour. Such approaches should be calibrated and validated by specific experimental techniques, quantifying both microstructural features and respective mechanisms at various length scales. The book provides an overview of modern modelling tools and experimental methods that can be employed to analyse and estimate properties and performance of advanced materials. A special feature of the book is the analysis of case studies used to demonstrate the strategies of solving the real-life problems, in which the microstructure of materials directly affects their response to loading and/or environmental conditions. The reader will benefit from a detailed analysis of various methods as well as their implementation for dealing with various advanced materials.
Download or read book Large Scale Disasters written by Mohamed Gad-el-Hak and published by Cambridge University Press. This book was released on 2008-06-23 with total page 569 pages. Available in PDF, EPUB and Kindle. Book excerpt: 'Extreme' events - including climatic events, such as hurricanes, tornadoes, drought - can cause massive disruption to society, including large death tolls and property damage in the billions of dollars. Events in recent years have shown the importance of being prepared and that countries need to work together to help alleviate the resulting pain and suffering. This volume presents an integrated review of the broad research field of large-scale disasters. It establishes a common framework for predicting, controlling and managing both manmade and natural disasters. There is a particular focus on events caused by weather and climate change. Other topics include air pollution, tsunamis, disaster modeling, the use of remote sensing and the logistics of disaster management. It will appeal to scientists, engineers, first responders and health-care professionals, in addition to graduate students and researchers who have an interest in the prediction, prevention or mitigation of large-scale disasters.
Download or read book Nonlinear Mechanics for Composite Heterogeneous Structures written by Georgios A. Drosopoulos and published by CRC Press. This book was released on 2022-04-26 with total page 327 pages. Available in PDF, EPUB and Kindle. Book excerpt: Nonlinear Mechanics for Composite Heterogeneous Structures applies both classical and multi-scale finite element analysis to the non-linear, failure response of composite structures. These traditional and modern computational approaches are holistically presented, providing insight into a range of non-linear structural analysis problems. The classical methods include geometric and material non-linearity, plasticity, damage and contact mechanics. The cutting-edge formulations include cohesive zone models, the Extended Finite Element Method (XFEM), multi-scale computational homogenization, localization of damage, neural networks and data-driven techniques. This presentation is simple but efficient, enabling the reader to understand, select and apply appropriate methods through programming code or commercial finite element software. The book is suitable for undergraduate studies as a final year textbook and for MSc and PhD studies in structural, mechanical, aerospace engineering and material science, among others. Professionals in these fields will also be strongly benefited. An accompanying website provides MATLAB codes for two-dimensional finite element problems with contact, multi-scale (FE2) and non-linear XFEM analysis, data-driven and machine learning simulations.
Download or read book Advances in nonlinear systems and networks volume II written by Fei Yu and published by Frontiers Media SA. This book was released on 2024-03-04 with total page 131 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Climate Protection Resource Efficiency and Sustainable Engineering written by Ilona Horwath and published by transcript Verlag. This book was released on 2023-08-31 with total page 253 pages. Available in PDF, EPUB and Kindle. Book excerpt: The big societal challenges, such as climate change and public health, call for innovative approaches to address them. The contributors of this book present new ways to tackle these challenges by inter- and transdisciplinary collaborations in light weight engineering. They introduce a framework for transdisciplinary collaboration, explore the potential of light weight engineering in the areas of climate protection, resource efficiency, and sustainable mobility. To do so, they exemplify results and limitations of transdisciplinary collaboration based on three case studies: the optimization of rescue tools, the re-design of products to foster re-use and recycling processes in companies and society, and the additive manufacturing of individualized assistive tools and prostheses.
Download or read book Applied Micromechanics of Complex Microstructures written by Majid Baniassadi and published by Elsevier. This book was released on 2023-03-02 with total page 453 pages. Available in PDF, EPUB and Kindle. Book excerpt: Applied Micromechanics of Complex Microstructures explains the fundamental concepts of continuum modeling of various complicated microstructures, covering nanocomposites, multiphase composites, biomaterials, biological materials, and more. The authors outline the calculation of effective mechanical and thermal properties, allowing readers to understand the step-by-step modeling and homogenization of complicated microstructures, and the book also features a chapter on microstructure hull and material design. Modeling of complex samples with nonlinear properties such as neural tissue, bone microstructure, and liver tissue is also explained and analyzed. Explains the core concepts of continuum modeling of different complex microstructures, including nanocomposites, multiphase composites, biomaterials, and biological materials Provides detailed calculations of eff ective mechanical and thermal properties allowing the audience to understand the modeling and homogenization of complex microstructures Covers several methods for designing the microstructure of heterogeneous materials
Download or read book Fiber Orientation Tensors and Mean Field Homogenization Application to Sheet Molding Compound written by Bauer, Julian Karl and published by KIT Scientific Publishing. This book was released on 2023-02-27 with total page 252 pages. Available in PDF, EPUB and Kindle. Book excerpt: Effective mechanical properties of fiber-reinforced composites strongly depend on the microstructure, including the fibers' orientation. Studying this dependency, we identify the variety of fiber orientation tensors up to fourth-order using irreducible tensors and material symmetry. The case of planar fiber orientation tensors, relevant for sheet molding compound, is presented completely. Consequences for the reconstruction of fiber distributions and mean field homogenization are presented.
Download or read book Plasticity and Fracture written by Wolfgang Brocks and published by Springer. This book was released on 2017-08-16 with total page 189 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book is based on 40 years of research and teaching in the fields of fracture mechanics and plasticity. It will bring students and engineers from various disciplines up to date on key concepts that have become increasingly important in the design of safety-relevant engineering structures in general and in modern lightweight structures in the transportation industry in particular. Primarily intended for graduate students in the engineering sciences and practicing structural engineers, it employs a multidisciplinary approach that comprises theoretical concepts, numerical methods, and experimental techniques. In addition, it includes a wealth of analytical and numerical examples, used to illustrate the applications of the concepts discussed.
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:
Download or read book Continuum Micromechanics written by P. Suquet and published by Springer. This book was released on 2014-05-04 with total page 352 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book presents the most recent progress of fundamental nature made in the new developed field of micromechanics: transformation field analysis, variational bounds for nonlinear composites, higher-order gradients in micromechanical damage models, dynamics of composites, pattern based variational bounds.
