Author: Henry Gonzalez
Publisher:
ISBN:
Category :
Languages : en
Pages : 282
Book Description
A Study of Anisotropic and Viscoelastic Ductile Fracture
Author: Henry Gonzalez
Publisher:
ISBN:
Category :
Languages : en
Pages : 282
Book Description
Publisher:
ISBN:
Category :
Languages : en
Pages : 282
Book Description
Study on Ductile Fracture with Anisotropic and Strain Rate Effects in Manufacturing Processes
Author: Hao Pan
Publisher:
ISBN:
Category :
Languages : en
Pages : 168
Book Description
KEYWORDS: Plasticity, Ductile Fracture, Anisotropy, Strain Rate, Finite Element Analysis, AHSS, Aluminum Alloys, Metal Forming, Machining
Publisher:
ISBN:
Category :
Languages : en
Pages : 168
Book Description
KEYWORDS: Plasticity, Ductile Fracture, Anisotropy, Strain Rate, Finite Element Analysis, AHSS, Aluminum Alloys, Metal Forming, Machining
Scientific and Technical Aerospace Reports
Author:
Publisher:
ISBN:
Category : Aeronautics
Languages : en
Pages : 702
Book Description
Publisher:
ISBN:
Category : Aeronautics
Languages : en
Pages : 702
Book Description
Anisotropic Ductile Fracture of Metal Sheets
Author: Meng Luo (Ph. D.)
Publisher:
ISBN:
Category :
Languages : en
Pages : 311
Book Description
Anisotropic mechanical properties are common in plastically deformed or thermomechanically processed metallic materials, e.g. in rolled or extruded sheet. Among them, the anisotropy of large strain plastic deformation and ductile fracture under multi-axial loading is highly relevant to various industrial applications such as metal forming, impact failure of structures, etc. In this thesis, a comprehensive study of the plasticity and ductile fracture of anisotropic metal sheets is presented, covering experimental characterization, constitutive modeling and numerical implementation. On the basis of an extensive multiaxial experimental program, the anisotropic plasticity of the present aluminum alloy is modeled using a macroscopic phenomenological model and a polycrystalline plasticity model, respectively. The proposed phenomenological modeling makes use of a linear-transformation- based orthotropic yield function with pressure dependence, as well as a combined isotropic/kinematic hardening law, and is able to capture most features of the anisotropic plastic behavior under various multi-axial stress states with good accuracy and computational efficiency. At the same time, a physically-motivated self-consistent polycrystalline plasticity model is utilized to describe the texture-induced anisotropy and through-thickness heterogeneity of the present sheet material. A Reduced Texture Methodology (RTM) is developed to provide the computational efficiency needed for industrial applications. In additional to an accurate prediction of all macroscopic material behaviors, the polycrystalline model reveals that the development of the crystallographic texture is the underlying mechanism of plastic anisotropy and heterogeneity. The anisotropic ductile fracture of the present aluminum alloy extrusion is investigated using a hybrid experimental-numerical approach. The experimental results show a strong dependency of the strain to fracture on the material orientation with respect to the loading direction. A new non-associated anisotropic fracture model is proposed which makes use of a stress state dependent fracture locus and an anisotropic plastic strain measure obtained through the linear transformation of the plastic strain tensor. It is shown that the use of the Modified Mohr-Coulomb (MMC) stress state weighting function in this anisotropic fracture modeling framework provides accurate predictions of the onset of fracture for all fourteen distinct fracture experiments. The proposed plasticity and fracture modeling framework is successfully validated on a industrial stretch-bending operation.
Publisher:
ISBN:
Category :
Languages : en
Pages : 311
Book Description
Anisotropic mechanical properties are common in plastically deformed or thermomechanically processed metallic materials, e.g. in rolled or extruded sheet. Among them, the anisotropy of large strain plastic deformation and ductile fracture under multi-axial loading is highly relevant to various industrial applications such as metal forming, impact failure of structures, etc. In this thesis, a comprehensive study of the plasticity and ductile fracture of anisotropic metal sheets is presented, covering experimental characterization, constitutive modeling and numerical implementation. On the basis of an extensive multiaxial experimental program, the anisotropic plasticity of the present aluminum alloy is modeled using a macroscopic phenomenological model and a polycrystalline plasticity model, respectively. The proposed phenomenological modeling makes use of a linear-transformation- based orthotropic yield function with pressure dependence, as well as a combined isotropic/kinematic hardening law, and is able to capture most features of the anisotropic plastic behavior under various multi-axial stress states with good accuracy and computational efficiency. At the same time, a physically-motivated self-consistent polycrystalline plasticity model is utilized to describe the texture-induced anisotropy and through-thickness heterogeneity of the present sheet material. A Reduced Texture Methodology (RTM) is developed to provide the computational efficiency needed for industrial applications. In additional to an accurate prediction of all macroscopic material behaviors, the polycrystalline model reveals that the development of the crystallographic texture is the underlying mechanism of plastic anisotropy and heterogeneity. The anisotropic ductile fracture of the present aluminum alloy extrusion is investigated using a hybrid experimental-numerical approach. The experimental results show a strong dependency of the strain to fracture on the material orientation with respect to the loading direction. A new non-associated anisotropic fracture model is proposed which makes use of a stress state dependent fracture locus and an anisotropic plastic strain measure obtained through the linear transformation of the plastic strain tensor. It is shown that the use of the Modified Mohr-Coulomb (MMC) stress state weighting function in this anisotropic fracture modeling framework provides accurate predictions of the onset of fracture for all fourteen distinct fracture experiments. The proposed plasticity and fracture modeling framework is successfully validated on a industrial stretch-bending operation.
American Doctoral Dissertations
Author:
Publisher:
ISBN:
Category : Dissertation abstracts
Languages : en
Pages : 848
Book Description
Publisher:
ISBN:
Category : Dissertation abstracts
Languages : en
Pages : 848
Book Description
VPI-E.
Author: Virginia Polytechnic Institute and State University. College of Engineering
Publisher:
ISBN:
Category : Engineering
Languages : en
Pages : 724
Book Description
Publisher:
ISBN:
Category : Engineering
Languages : en
Pages : 724
Book Description
Development of an Anisotropic Damage Mechanics Model in Ductile Fracture
Author: 王軍
Publisher: Open Dissertation Press
ISBN: 9781374759572
Category :
Languages : en
Pages :
Book Description
This dissertation, "Development of an Anisotropic Damage Mechanics Model in Ductile Fracture" by 王軍, Chun, Wang, was obtained from The University of Hong Kong (Pokfulam, Hong Kong) and is being sold pursuant to Creative Commons: Attribution 3.0 Hong Kong License. The content of this dissertation has not been altered in any way. We have altered the formatting in order to facilitate the ease of printing and reading of the dissertation. All rights not granted by the above license are retained by the author. DOI: 10.5353/th_b3123137 Subjects: Fracture mechanics Continuum damage mechanics
Publisher: Open Dissertation Press
ISBN: 9781374759572
Category :
Languages : en
Pages :
Book Description
This dissertation, "Development of an Anisotropic Damage Mechanics Model in Ductile Fracture" by 王軍, Chun, Wang, was obtained from The University of Hong Kong (Pokfulam, Hong Kong) and is being sold pursuant to Creative Commons: Attribution 3.0 Hong Kong License. The content of this dissertation has not been altered in any way. We have altered the formatting in order to facilitate the ease of printing and reading of the dissertation. All rights not granted by the above license are retained by the author. DOI: 10.5353/th_b3123137 Subjects: Fracture mechanics Continuum damage mechanics
Viscoelastic Solids (1998)
Author: Roderic S. Lakes
Publisher: CRC Press
ISBN: 1351355643
Category : Technology & Engineering
Languages : en
Pages : 476
Book Description
Viscoelastic Solids covers the mathematical theory of viscoelasticity and physical insights, causal mechanisms, and practical applications. The book: presents a development of the theory, addressing both transient and dynamic aspects as well as emphasizing linear viscoelasticity synthesizes the structure of the theory with the aim of developing physical insight illustrates the methods for the solution of stress analysis problems in viscoelastic objects explores experimental methods for the characterization of viscoelastic materials describes the phenomenology of viscoelasticity in a variety of materials, including polymers, metals, high damping alloys, rock, piezoelectric materials, cellular solids, dense composite materials, and biological materials analyzes high damping and extremely low damping provides the theory of viscoelastic composite materials, including examples of various types of structure and the relationships between structure and mechanical properties contains examples on the use of viscoelastic materials in preventing and alleviating human suffering Viscoelastic Solids also demonstrates the use of viscoelasticity for diverse applications, such as earplugs, gaskets, computer disks, satellite stability, medical diagnosis, injury prevention, vibration abatement, tire performance, sports, spacecraft explosions, and music.
Publisher: CRC Press
ISBN: 1351355643
Category : Technology & Engineering
Languages : en
Pages : 476
Book Description
Viscoelastic Solids covers the mathematical theory of viscoelasticity and physical insights, causal mechanisms, and practical applications. The book: presents a development of the theory, addressing both transient and dynamic aspects as well as emphasizing linear viscoelasticity synthesizes the structure of the theory with the aim of developing physical insight illustrates the methods for the solution of stress analysis problems in viscoelastic objects explores experimental methods for the characterization of viscoelastic materials describes the phenomenology of viscoelasticity in a variety of materials, including polymers, metals, high damping alloys, rock, piezoelectric materials, cellular solids, dense composite materials, and biological materials analyzes high damping and extremely low damping provides the theory of viscoelastic composite materials, including examples of various types of structure and the relationships between structure and mechanical properties contains examples on the use of viscoelastic materials in preventing and alleviating human suffering Viscoelastic Solids also demonstrates the use of viscoelasticity for diverse applications, such as earplugs, gaskets, computer disks, satellite stability, medical diagnosis, injury prevention, vibration abatement, tire performance, sports, spacecraft explosions, and music.
Dissertation Abstracts International
Author:
Publisher:
ISBN:
Category : Dissertations, Academic
Languages : en
Pages : 792
Book Description
Publisher:
ISBN:
Category : Dissertations, Academic
Languages : en
Pages : 792
Book Description
The Variational Approach to Fracture
Author: Blaise Bourdin
Publisher: Springer Science & Business Media
ISBN: 1402063954
Category : Technology & Engineering
Languages : en
Pages : 173
Book Description
Presenting original results from both theoretical and numerical viewpoints, this text offers a detailed discussion of the variational approach to brittle fracture. This approach views crack growth as the result of a competition between bulk and surface energy, treating crack evolution from its initiation all the way to the failure of a sample. The authors model crack initiation, crack path, and crack extension for arbitrary geometries and loads.
Publisher: Springer Science & Business Media
ISBN: 1402063954
Category : Technology & Engineering
Languages : en
Pages : 173
Book Description
Presenting original results from both theoretical and numerical viewpoints, this text offers a detailed discussion of the variational approach to brittle fracture. This approach views crack growth as the result of a competition between bulk and surface energy, treating crack evolution from its initiation all the way to the failure of a sample. The authors model crack initiation, crack path, and crack extension for arbitrary geometries and loads.