Micro-macro Investigations on the Mechanical Behavior and Material Failure Using the Framework of Extended Finite Element Method (XFEM). PDF Download

Author: Ahmed Youssri Elruby
Publisher:
ISBN:
Category :
Languages : en
Pages :

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Book Description
The current dissertation provides developments on mechanical behavior and material failure modeling utilizing the framework of extended finite element method (XFEM). Different types of materials, i.e., brittle and ductile were numerically investigated at different length scales. Plain epoxy resin representing the brittle behavior was prepared and tested using digital image correlation (DIC) displacement measurement system on an Instron© load-frame under different types of loading. Advanced technology methods such as optical and scan electron microscopy (SEM) were used to characterize the failure mechanisms of the tested specimens. Also, computed tomography (CT) scans were used to identify the void content within the epoxy specimens. In addition, fracture surfaces were also CT scanned to further investigate epoxy's failure mechanism closely. On the other hand, relevant reported testing results in the literature regarding low and high strength steel materials were used to represent the ductile behavior. Different micromechanical methods such as unit cell (UC) and representative volume element (RVE) were employed in the framework of finite element method (FEM) or XFEM to numerically obtain mechanical behaviors and/or investigate material damage from a microscopic point of view. Several algorithms were developed to automate micromechanical modeling in Abaqus, and they were implemented using Python scripting. Also, different user-defined subroutines regarding the material behavior and damage were developed for macroscopic modeling and implemented using Fortran. A chief contribution of the current dissertation is the extended Ramberg-Osgood (ERO) relationship to account for metal porosity which was enabled by utilizing micromechanical modeling along with regression analyses.

Author: Amir R. Khoei
Publisher: John Wiley & Sons
ISBN: 1118869699
Category : Science
Languages : en
Pages : 584

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Book Description
Introduces the theory and applications of the extended finite element method (XFEM) in the linear and nonlinear problems of continua, structures and geomechanics Explores the concept of partition of unity, various enrichment functions, and fundamentals of XFEM formulation. Covers numerous applications of XFEM including fracture mechanics, large deformation, plasticity, multiphase flow, hydraulic fracturing and contact problems Accompanied by a website hosting source code and examples

Author: Somnath Ghosh
Publisher: CRC Press
ISBN: 1420094386
Category : Technology & Engineering
Languages : en
Pages : 714

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Book Description
As multi-phase metal/alloy systems and polymer, ceramic, or metal matrix composite materials are increasingly being used in industry, the science and technology for these heterogeneous materials has advanced rapidly. By extending analytical and numerical models, engineers can analyze failure characteristics of the materials before they are integrat

Author: Timon Rabczuk
Publisher: MDPI
ISBN: 3039216864
Category : Technology & Engineering
Languages : en
Pages : 406

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Book Description
This book offers a collection of 17 scientific papers about the computational modeling of fracture. Some of the manuscripts propose new computational methods and/or how to improve existing cutting edge methods for fracture. These contributions can be classified into two categories: 1. Methods which treat the crack as strong discontinuity such as peridynamics, scaled boundary elements or specific versions of the smoothed finite element methods applied to fracture and 2. Continuous approaches to fracture based on, for instance, phase field models or continuum damage mechanics. On the other hand, the book also offers a wide range of applications where state-of-the-art techniques are employed to solve challenging engineering problems such as fractures in rock, glass, concrete. Also, larger systems such as fracture in subway stations due to fire, arch dams, or concrete decks are studied.

Author: Tero Tuovinen
Publisher: Springer Nature
ISBN: 3031611098
Category :
Languages : en
Pages : 289

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Author: Alaskar Alizada
Publisher:
ISBN: 9783844015034
Category :
Languages : en
Pages : 171

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Book Description

Author: Zhuo Zhuang
Publisher: Academic Press
ISBN: 9780124077171
Category : Technology & Engineering
Languages : en
Pages : 0

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Book Description
Extended Finite Element Method provides an introduction to the extended finite element method (XFEM), a novel computational method which has been proposed to solve complex crack propagation problems. The book helps readers understand the method and make effective use of the XFEM code and software plugins now available to model and simulate these complex problems. The book explores the governing equation behind XFEM, including level set method and enrichment shape function. The authors outline a new XFEM algorithm based on the continuum-based shell and consider numerous practical problems, including planar discontinuities, arbitrary crack propagation in shells and dynamic response in 3D composite materials.

Author: Askar Zhussupbekov
Publisher: CRC Press
ISBN: 1000992543
Category : Technology & Engineering
Languages : en
Pages : 4162

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Book Description
Smart Geotechnics for Smart Societies contains the contributions presented at the 17th Asian Regional Conference on Soil Mechanics and Geotechnical Engineering (17th ARC, Astana, Kazakhstan, 14-18 August, 2023). The topics covered include: - Geomaterials for soil improvement - Tunneling and rock engineering - Slope, embankments and dams - Shallow and deep foundations - Soil dynamics and geotechnical earthquake engineering - Geoenvironmental engineering and frost geotechnics - Investigation of foundations of historical structures and monitoring - Offshore, harbor geotechnics and GeoEnergy - Megaprojects and transportation geotechnics Smart Geotechnics for Smart Societies will be of interest to academics and engineers interested or involved in geotechnical engineering.

Author: Chongmin Song
Publisher: John Wiley & Sons
ISBN: 1119388457
Category : Science
Languages : en
Pages : 775

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Book Description
An informative look at the theory, computer implementation, and application of the scaled boundary finite element method This reliable resource, complete with MATLAB, is an easy-to-understand introduction to the fundamental principles of the scaled boundary finite element method. It establishes the theory of the scaled boundary finite element method systematically as a general numerical procedure, providing the reader with a sound knowledge to expand the applications of this method to a broader scope. The book also presents the applications of the scaled boundary finite element to illustrate its salient features and potentials. The Scaled Boundary Finite Element Method: Introduction to Theory and Implementation covers the static and dynamic stress analysis of solids in two and three dimensions. The relevant concepts, theory and modelling issues of the scaled boundary finite element method are discussed and the unique features of the method are highlighted. The applications in computational fracture mechanics are detailed with numerical examples. A unified mesh generation procedure based on quadtree/octree algorithm is described. It also presents examples of fully automatic stress analysis of geometric models in NURBS, STL and digital images. Written in lucid and easy to understand language by the co-inventor of the scaled boundary element method Provides MATLAB as an integral part of the book with the code cross-referenced in the text and the use of the code illustrated by examples Presents new developments in the scaled boundary finite element method with illustrative examples so that readers can appreciate the significant features and potentials of this novel method—especially in emerging technologies such as 3D printing, virtual reality, and digital image-based analysis The Scaled Boundary Finite Element Method: Introduction to Theory and Implementation is an ideal book for researchers, software developers, numerical analysts, and postgraduate students in many fields of engineering and science.

Author: Olivier Coussy
Publisher: John Wiley & Sons
ISBN: 1119956161
Category : Science
Languages : en
Pages : 246

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Book Description
Mechanics and Physics of Porous Solids addresses the mechanics and physics of deformable porous materials whose porous space is filled by one or several fluid mixtures interacting with the solid matrix. Coussy uses the language of thermodynamics to frame the discussion of this topic and bridge the gap between physicists and engineers, and organises the material in such a way that individual phases are explored, followed by coupled problems of increasing complexity. This structure allows the reader to build a solid understanding of the physical processes occurring in the fluids and then porous solids. Mechanics and Physics of Porous Solids offers a critical reference on the physics of multiphase porous materials - key reading for engineers and researchers in structural and material engineering, concrete, wood and materials science, rock and soil mechanics, mining and oil prospecting, biomechanics.