ductile fracture in metal forming

Ductile Fracture In Metal Forming
Author: Kazutake Komori
Publisher: Academic Press
Release Date: 2019-10-11
Pages: 294
ISBN:
Available Language: English, Spanish, And French
EBOOK SYNOPSIS:

Ductile Fracture in Metal Forming: Modeling and Simulation examines the current understanding of the mechanics and physics of ductile fracture in metal forming processes while also providing an approach to micromechanical ductile fracture prediction that can be applied to all metal forming processes. Starting with an overview of different ductile fracture scenarios, the book then goes on to explain modeling techniques that predict a range of mechanical phenomena that can lead to ductile fracture. The challenges in creating micromechanical models are addressed alongside methods of applying these models to several common metal forming processes. This book is suitable for researchers working in mechanics of materials, metal forming, mechanical metallurgy, and plasticity. Engineers in R&D industries involved in metal forming such as manufacturing, aerospace, and automation will also find the book very useful. Explains innovative micromechanical modeling techniques for a variety of material behaviors Examines how these models can be applied to metal forming processes in practice, including blanking, arrowed cracks in drawing, and surface cracks in upset forging Provides a thorough examination of both macroscopic and microscopic ductile fracture theory

Ductile Fracture Of Metals
Author: P. F. Thomason
Publisher: Pergamon
Release Date: 1990
Pages: 219
ISBN:
Available Language: English, Spanish, And French
EBOOK SYNOPSIS:

An account of the recent developments in research into ductile fracture in metals and alloys. Aspects covered include localized fracture at the root of notches and sharp cracks, and fracture in bulk plastic-deformation processes of the metal and metal forming type. Also discusses various theoretical

Modeling Of Ductile Fracture From Shear To Balanced Biaxial Tension For Sheet Metals
Author:
Publisher:
Release Date: 2017
Pages:
ISBN:
Available Language: English, Spanish, And French
EBOOK SYNOPSIS:

Highlights: A model is proposed to describe shear ductile fracture from shear to the balanced biaxial tension. The stress invariant-based Drucker yield function is specified for BCC and FCC metals to the balanced biaxial tension. The model is successfully employed to predict ductile fracture of AA6082 in wide loading conditions. The model could also be used to describe ductile fracture under low and negative stress triaxiality with improved flexibility. Abstract: A ductile fracture model is proposed to describe shear fracture of sheet metals from shear to balanced biaxial tension via uniaxial and plane strain tension. The fracture criterion models plastic damage as strain-induced void nucleation, triaxiality-governed void enlargement, Lode-controlled void torsion, and shear-restrained coalescence of voids. Its flexibility is investigated by a parameter study of the ductile fracture model proposed. The fracture model is employed to describe ductile fracture behavior of an aluminum alloy AA6082 T6 (thickness: 1.0 mm). Dogbone specimens are strained to characterize the strain hardening properties, while another four different specimens are tested to characterize fracture behavior in shear, uniaxial tension, plane strain tension and balanced biaxial tension. The loading processes are analyzed numerically with the stress invariant-based Drucker yield function which is for the first time specified for body-centered cubic and face-centered cubic metals. Fracture strains in various loading conditions are measured with a hybrid experimental-numerical approach. The measured fracture strains are then used to calibrate the ductile fracture model proposed. The ductile fracture model calibrated above is employed to predict the onset of ductile fracture for these four specimens. For the purpose of comparison, the predicted fracture strokes of these four loading conditions are compared with those predicted by the modified Mohr–Coulomb model (Baiand Wierzbicki, 2008 ), and two micromechanism-inspired criteria proposed recently (Lou etal., 2012, 2014 ). The comparison reveals that the proposed model predicts the fracture behavior in much better agreement compared with experimental results from shear to the balanced biaxial tension. Accordingly, the proposed ductile fracture criterion is recommended for the prediction of ductile fracture in sheet metal forming processes, optimization of forming parameters and design of tools for both solid elements and shell elements. Besides, the ductile fracture model proposed can also be applied in various bulk metal forming processes in case that the model is calibrated by proper sets of experiments.

Modeling Of Metal Forming And Machining Processes
Author: Prakash Mahadeo Dixit
Publisher: Springer Science & Business Media
Release Date: 2008-05-14
Pages: 590
ISBN:
Available Language: English, Spanish, And French
EBOOK SYNOPSIS:

Written by authorities in the subject, this book provides a complete treatment of metal forming and machining by using the computational techniques FEM, fuzzy set theory and neural networks as modelling tools. The algorithms and solved examples included make this book of value to postgraduates, senior undergraduates, and lecturers and researchers in these fields. Research and development engineers and consultants for the manufacturing industry will also find it of use.

Micromechanics Modelling Of Ductile Fracture
Author: Zengtao Chen
Publisher: Springer Science & Business Media
Release Date: 2013-04-02
Pages: 307
ISBN:
Available Language: English, Spanish, And French
EBOOK SYNOPSIS:

This book summarizes research advances in micromechanics modeling of ductile fractures made in the past two decades. The ultimate goal of this book is to reach manufacturing frontline designers and materials engineers by providing a user-oriented, theoretical background of micromechanics modeling. Accordingly, the book is organized in a unique way, first presenting a vigorous damage percolation model developed by the authors over the last ten years. This model overcomes almost all difficulties of the existing models and can be used to completely accommodate ductile damage developments within a single-measure microstructure frame. Related void damage criteria including nucleation, growth and coalescence are then discussed in detail: how they are improved, when and where they are used in the model, and how the model performs in comparison with the existing models. Sample forming simulations are provided to illustrate the model’s performance.

Multiscale Modelling In Sheet Metal Forming
Author: Dorel Banabic
Publisher: Springer
Release Date: 2016-10-20
Pages: 405
ISBN:
Available Language: English, Spanish, And French
EBOOK SYNOPSIS:

This book gives a unified presentation of the research performed in the field of multiscale modelling in sheet metal forming over the course of more than thirty years by the members of six teams from internationally acclaimed universities. The first chapter is devoted to the presentation of some recent phenomenological yield criteria (BBC 2005 and BBC 2008) developed at the CERTETA center from the Technical University of Cluj-Napoca. An overview on the crystallographic texture and plastic anisotropy is presented in Chapter 2. Chapter 3 is dedicated to multiscale modelling of plastic anisotropy. The authors describe a new hierarchical multi-scale framework that allows taking into account the evolution of plastic anisotropy during sheet forming processes. Chapter 4 is focused on modelling the evolution of voids in porous metals with applications to forming limit curves and ductile fracture. The chapter details the steps needed for the development of dissipation functions and Gurson-type models for non-quadratic anisotropic plasticity criteria like BBC 2005 and those based on linear transformations. Chapter 5 describes advanced models for the prediction of forming limit curves developed by the authors. Chapter 6 is devoted to anisotropic damage in elasto-plastic materials with structural defects. Finally, Chapter 7 deals with modelling of the Portevin-Le Chatelier (PLC) effect. This volume contains contributions from leading researchers from the Technical University of Cluj-Napoca, Romania, the Catholic University of Leuven, Belgium, Clausthal University of Technology, Germany, Amirkabir University of Technology, Iran, the University of Bucharest, Romania, and the Institute of Mathematics of the Romanian Academy, Romania. It will prove useful to postgraduate students, researchers and engineers who are interested in the mechanical modeling and numerical simulation of sheet metal forming processes.

Deformation And Fracture In Technological Processes
Author: Robert V. Goldstein
Publisher: Trans Tech Publications Ltd
Release Date: 2012-11-12
Pages: 224
ISBN:
Available Language: English, Spanish, And French
EBOOK SYNOPSIS:

This special collection of peer-reviewed papers focuses on mechanical approaches to the experimental study and modeling of the deformation processes and defect formation accompanying various technologies. Volume is indexed by Thomson Reuters CPCI-S (WoS). A series of papers was devoted to the processes of metal-forming. Special attention was paid to the question of micro- and nano-structure adjustment during processes such as extrusion and microtube press-bending. Other papers covered models for damage accumulation and healing, as well as fracture prediction during metal forming.

Materials Processing Defects
Author: M. Predeleanu
Publisher: Elsevier
Release Date: 1995-02-24
Pages: 434
ISBN:
Available Language: English, Spanish, And French
EBOOK SYNOPSIS:

The technological field of defects, and more appropriately, avoidance of them, is very current in perhaps all sectors of the manufacturing industry. This is particularly important to reduce/minimize waste everywhere to address lean production procedures. The recent advances in finite plasticity and visioplasticity, damage modelling, instability theories, fracture modelling, computer numerical techniques and process simulation etc. offer new approaches and tools for defect prediction, analyses and guidelines for designing components to be manufactured by traditional and emerging process technologies. This volume contains contributions from well known researchers and experts in the field presenting an up-to-date overview of advances in this area. Subjects covered include: micro- and macro-scale observation of defects; localization and instability analysis; damage modelling and fracture criteria; defect prediction methods; design considerations to avoid defects.

Modelling And Simulation Of Sheet Metal Forming Processes
Author: Marta C. Oliveira
Publisher: MDPI
Release Date: 2020-04-22
Pages: 254
ISBN:
Available Language: English, Spanish, And French
EBOOK SYNOPSIS:

The numerical simulation of sheet metal forming processes has become an indispensable tool for the design of components and their forming processes. This role was attained due to the huge impact in reducing time to market and the cost of developing new components in industries ranging from automotive to packing, as well as enabling an improved understanding of the deformation mechanisms and their interaction with process parameters. Despite being a consolidated tool, its potential for application continues to be discovered with the continuous need to simulate more complex processes, including the integration of the various processes involved in the production of a sheet metal component and the analysis of in-service behavior. The quest for more robust and sustainable processes has also changed its deterministic character into stochastic to be able to consider the scatter in mechanical properties induced by previous manufacturing processes. Faced with these challenges, this Special Issue presents scientific advances in the development of numerical tools that improve the prediction results for conventional forming process, enable the development of new forming processes, or contribute to the integration of several manufacturing processes, highlighting the growing multidisciplinary characteristic of this field.

Shear Localization And Ductile Fracture In Metal Cutting
Author: Raymond Kim Yee
Publisher:
Release Date: 1990
Pages: 328
ISBN:
Available Language: English, Spanish, And French
EBOOK SYNOPSIS:

Advances In Engineering Plasticity And Its Application IX
Author: Jeong Whan Yoon
Publisher: Trans Tech Publications Ltd
Release Date: 2019-02-25
Pages: 358
ISBN:
Available Language: English, Spanish, And French
EBOOK SYNOPSIS:

This edition includes the selected papers in the area of engineering plasticity, which were presented at the 14th Asia-Pacific Symposium on Engineering Plasticity and its Applications (AEPA 2018) was held on Jeju Island, Korea during December 2-7, 2018.

Metal Failures
Author: Arthur J. McEvily
Publisher: John Wiley & Sons
Release Date: 2013-08-26
Pages: 504
ISBN:
Available Language: English, Spanish, And French
EBOOK SYNOPSIS:

One of the only texts available to cover not only how failure occurs but also examine methods developed to expose the reasons for failure, Metal Failures has long been considered the most definitive and authoritative resources in metallurgical failure analysis. Now in a completely revised edition, this Second Edition features updates of all chapters plus new coverage of elastic behavior and plastic deformation, localized necking, the phenomenological aspects of fatigue, fatigue crack propagation, alloys and coatings, tensors and tensor notations, and much more.

Ductile Fracture And Ductility
Author: Bradley Dodd
Publisher:
Release Date: 1987
Pages: 310
ISBN:
Available Language: English, Spanish, And French
EBOOK SYNOPSIS:

Structural Crashworthiness And Failure
Author: N. Jones
Publisher: CRC Press
Release Date: 2010-02-25
Pages: 528
ISBN:
Available Language: English, Spanish, And French
EBOOK SYNOPSIS:

This book contains twelve invited lectures from the Third International Symposium on Structural Crashworthiness. Particular emphasis is given to the failure predictions for ductile metal structures under large dynamic loads and to the behaviour of composite and cellular structures.

The Physics Of Metals And Metallography
Author:
Publisher:
Release Date: 1989
Pages:
ISBN:
Available Language: English, Spanish, And French
EBOOK SYNOPSIS:

Advances In Fracture And Strength
Author: Young Jin Kim
Publisher: Trans Tech Publications Ltd
Release Date: 2005-11-15
Pages: 3000
ISBN:
Available Language: English, Spanish, And French
EBOOK SYNOPSIS:

Volume is indexed by Thomson Reuters CPCI-S (WoS). This volume comprises selected papers from the Asian Pacific Conference for Fracture and Strength (APCFS’04), held on Jeju Island, Korea during the 6th to 8th October, 2004. During this conference, participants from the Asian-Pacific region gathered in order to exchange the latest experimental, theoretical and computational research on the fracture, strength, integrity and reliability of materials and structures.

Forensic Engineering
Author:
Publisher:
Release Date: 1990
Pages:
ISBN:
Available Language: English, Spanish, And French
EBOOK SYNOPSIS:

Computational Methods For Predicting Material Processing Defects
Author: M. Predeleanu
Publisher: Elsevier
Release Date: 2014-06-28
Pages: 372
ISBN:
Available Language: English, Spanish, And French
EBOOK SYNOPSIS:

The papers in this book deal with computational methods for predicting material processing defects. Using recent advances in finite strain plasticity and viscoplasticity, damage modelling, bifurcation and instability theory, fracture mechanics and computer numerical techniques, new approaches to mechanical defect analysis are proposed. Appropriate methods for explaining and avoiding the defects leading to fracture, high porosity, strain localization or undesirable geometrical imperfections are presented. In addition, some papers are devoted to new formulations and new calculation algorithms to be used for solving the forming problems. Finally, two papers deal with physical description of defects occurring in forming and cutting operations, focusing on the academic and practical interest of these topics. This is the first book to deal with the prediction of defects occurring in material forming processes; it contains much of interest from both a theoretical and a practical viewpoint.

Sensors  Instrumentation And Special Topics  Volume 6
Author: Tom Proulx
Publisher: Springer Science & Business Media
Release Date: 2011-03-18
Pages: 310
ISBN:
Available Language: English, Spanish, And French
EBOOK SYNOPSIS:

Sensors, Instrumentation and Special Topics, Volume 6. Proceedings of the 29th IMAC, A Conference and Exposition on Structural Dynamics, 2011, the sixth volume of six from the Conference, brings together 27 contributions to this important area of research and engineering. The collection presents early findings and case studies on fundamental and applied aspects of Structural Dynamics, including papers on Structural Health Monitoring, High Intensity Noise Generation and other Special Topics.

Deformation Based Processing Of Materials
Author: Heng Li
Publisher: Elsevier
Release Date: 2019-02-15
Pages: 316
ISBN:
Available Language: English, Spanish, And French
EBOOK SYNOPSIS:

Deformation Based Processing of Materials: Behavior, Performance, Modeling and Control focuses on deformation based process behaviors and process performance in terms of the quality of the needed shape, geometries, and the requested properties of the deformed products. In addition, modelling and simulation is covered to create an in-depth and epistemological understanding of the process. Other topics discussed include ways to efficiently reduce or avoid defects and effectively improve the quality of deformed parts. The book is ideal as a technical document, but also serves as scientific literature for engineers, scientists, academics, research students and management professionals involved in deformation based materials processing. Covers process behaviors, such as non-uniform deformation, unstable deformation, material flow phenomena, and process performance Includes modelling and simulation of the entire deformation process Looks at control of the preferred deformation, undesirable material flow, avoidance and reduction of defects, and improving the dimensional accuracy, surface quality and microstructure construction of the produced products