Designing Benchmarks for Linear Elastic Finite Element Assemblies PDF Download

Author: Anargiros Kamoulakos
Publisher:
ISBN:
Category :
Languages : en
Pages :

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Author: Anargiros Kamoulakos
Publisher:
ISBN:
Category :
Languages : en
Pages :

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Author: Xing Tan
Publisher:
ISBN:
Category : Computer graphics
Languages : en
Pages : 191

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Book Description
Although the strut and tie approach is a rational and reasonable approach for the design of non-flexural members in concrete structures, the approach may lead to suboptimal design, as much of the material present in the member is neglected. Other difficulties, such as the amount of time consumed and the designer dependency of the solutions, have been encountered in its implementation. To avoid these problems, design may be undertaken using conventional linear elastic finite element analysis, which can yield more efficient designs with less material usage. However, the conventional linear elastic finite element method is also inefficient when the non-flexural members contain stress singularities, such as occur in a deep beam with square or rectangular web openings. These stress singularities lead to singular stress fields which always violate the yield criterion. This thesis proposes a modified linear elastic finite element method which can successfully remove the stress singularities by adjusting the elastic modulus in certain regions. This new approach involves stress redistribution in terms of both compressive stress and tensile stress. Three different types of beams, namely shallow beams, deep beams and deep beams with rectangular openings are used to demonstrate its efficiency. Additionally, both the conventional strut-and-tie method and the conventional LEFEA method are performed for comparison. Results show that the modified linear finite element approach to design (MLEFEA) is efficient, as it can overcome some of the inefficiencies involved in both conventional the strut-and-tie design approach and the conventional linear elastic finite element design approach. Furthermore, to verify its safety, the performance of the designs resulting from the new method is assessed through non-linear finite element analysis using ABAQUS, where the results indicate that MLEFEA is safe and can be used as a design approach. In order to make the MLEFEA analysis more efficient in terms of computing time, this thesis also describes the implementation of the method on Graphic Processor Units (or GPUs). GPUs are now being widely used in various scientific computational applications due to their tremendous performance, memory bandwidth and their massively-parallel and high intensity computational capacities. This thesis applies GPUs to the stress redistribution process arising from the analysis of deep beams with rectangular openings. The basic process of stress redistribution and the GPU architecture are first introduced, then several parallel techniques for the iterative methods are reviewed. Finally the PCG method is chosen as the most suitable approach for the current application. This is followed by an introduction to the CSR storage format and the SpMV algorithm. The GPU-PCG method used for solving the equations systems is then described, and the stiffness matrix assembly in CSR format is also presented. Finally, the efficiency of the GPU implementation is demonstrated by providing speed comparison results between the GPU-based and the CPU (sequential)-based algorithm for stress redistribution for the example of a deep beam with web openings.

Author: Glyn A. O. Davies
Publisher:
ISBN:
Category : Finite element method
Languages : en
Pages : 113

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Author: D. Linkens
Publisher:
ISBN:
Category :
Languages : en
Pages : 250

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Author:
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ISBN:
Category : Computer-aided design
Languages : en
Pages : 716

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Author: Louay Mohammad
Publisher: Springer
ISBN: 331961908X
Category : Science
Languages : en
Pages : 335

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This volume on “Advancement in the Design and Performance of Sustainable Asphalt Pavements” includes a collection of research and practical papers from an international research and technology activities on Mixture Design Innovation, Structural Pavement Design, Advancement in Production and Construction, Climate Changes and Effects on Infrastructure, Green Energy, Technology and Integration. The volume constitutes an important contribution in view of the urgent need to develop materials, designs, and practices to ensure the sustainability of transportation infrastructure. This volume is part of the proceedings of the 1st GeoMEast International Congress and Exhibition on Sustainable Civil Infrastructures, Egypt 2017.

Author: A. Kamoulakos
Publisher:
ISBN:
Category : Finite element method
Languages : en
Pages : 53

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Author: Kuang-Hua Chang
Publisher: Academic Press
ISBN: 0123984696
Category : Computers
Languages : en
Pages : 565

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Book Description
This is one book of a four-part series, which aims to integrate discussion of modern engineering design principles, advanced design tools, and industrial design practices throughout the design process. Through this series, the reader will: - Understand basic design principles and modern engineering design paradigms. - Understand CAD/CAE/CAM tools available for various design related tasks. - Understand how to put an integrated system together to conduct product design using the paradigms and tools. - Understand industrial practices in employing virtual engineering design and tools for product development. - Provides a comprehensive and thorough coverage on essential elements for product performance evaluation using the virtual engineering paradigms - Covers CAD/CAE in Structural Analysis using FEM, Motion Analysis of Mechanical Systems, Fatigue and Fracture Analysis - Each chapter includes both analytical methods and computer-aided design methods, reflecting the use of modern computational tools in engineering design and practice - A case study and tutorial example at the end of each chapter provide hands-on practice in implementing off-the-shelf computer design tools - Provides two projects at the end of the book showing the use of Pro/ENGINEER® and SolidWorks ® to implement concepts discussed in the book

Author: Christian Meyer
Publisher:
ISBN:
Category : Technology & Engineering
Languages : en
Pages : 462

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