Journal ArticleDOI
Testing and modelling of material behaviour and formability in sheet metal forming
Stefania Bruschi,T. Altan,Dorel Banabic,Paolo Francesco Bariani,Alexander Brosius,Jian Cao,Andrea Ghiotti,M. Khraisheh,Marion Merklein,A. E. Tekkaya +9 more
TLDR
In this paper, the authors provide a critical review of the models available today for predicting the material behaviour at both industrial and scientific level, and the tests needed to identify the models' material parameters.Abstract:
The paper deals with the testing and modelling of metals response when subjected to sheet forming operations. The focus is both on the modelling of hardening behaviour and yield criteria and on the description of the sheet metal formability limits. Within this scope, the paper provides a critical review of the models available today for predicting the material behaviour at both industrial and scientific level, and the tests needed to identify the models’ material parameters. The most recent advances in the field are also presented and discussed with particular emphasis on the challenges the sheet metal forming community is now facing.read more
Citations
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Journal ArticleDOI
Hot stamping of boron steel sheets with tailored properties: A review
TL;DR: A review of the main research activities recently carried out in the framework of hot stamping of boron steel sheets with tailored properties is given in this article, where the focus is on the process variants developed to locally adjust the mechanical properties of the hot stamped component as well as on the testing and modeling techniques needed to calibrate the numerical models of the tailored tempering processes and to evaluate the post-forming properties of stamped products.
Journal ArticleDOI
Hot stamping of ultra-high strength steel parts
Ken-ichiro Mori,Paolo Francesco Bariani,Bernd-Arno Behrens,Alexander Brosius,Stefania Bruschi,Tomoyoshi Maeno,Marion Merklein,Jun Yanagimoto +7 more
TL;DR: The hot stamping processes of quenchable steel sheets potentially offer not only small forming load and high formability, but also high strength and no springback by die quenching.
Journal ArticleDOI
A review on forming techniques for manufacturing lightweight complex—shaped aluminium panel components
TL;DR: In this paper, a comprehensive review of widely used forming processes for aluminium alloys, under cold, warm and hot forming conditions, and the material characteristics and equipment used for each process are presented.
Journal ArticleDOI
Metal forming beyond shaping: Predicting and setting product properties
A. E. Tekkaya,Julian M. Allwood,Paolo Francesco Bariani,Stefania Bruschi,Jian Cao,S. Gramlich,Peter Groche,Gerhard Hirt,Takashi Ishikawa,Christian Löbbe,J. Lueg-Althoff,Marion Merklein,Wojciech Z. Misiolek,Maciej Pietrzyk,Rajiv Shivpuri,Jun Yanagimoto +15 more
TL;DR: In this paper, the authors proposed a paradigm change in designing products by including manufacturing-induced effects in the initial dimensioning, which will lead to lightweight components and serve environmentally benign designs.
Journal ArticleDOI
Anisotropic and asymmetrical yielding and its distorted evolution: Modeling and applications
TL;DR: In this article, a unified continuum-based discontinuous (CBD) framework is constructed, in which SSM and SIM are introduced to capture the distorted shape of the yielding, and an interpolation approach is adopted to smoothly present the nonlinear evolution of the distorted plasticity in the full stress space.
References
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Journal ArticleDOI
Kinetics of Phase Change. I General Theory
TL;DR: In this paper, the theory of phase change is developed with the experimentally supported assumptions that the new phase is nucleated by germ nuclei which already exist in the old phase, and whose number can be altered by previous treatment.
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Kinetics of Phase Change. II Transformation‐Time Relations for Random Distribution of Nuclei
TL;DR: In this article, a relation between the actual transformed volume V and a related extended volume V1 ex is derived upon statistical considerations, and a rough approximation to this relation is shown to lead, under the proper conditions, to the empirical formula of Austin and Rickett.
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Continuum Theory of Ductile Rupture by Void Nucleation and Growth: Part I—Yield Criteria and Flow Rules for Porous Ductile Media
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Fracture characteristics of three metals subjected to various strains, strain rates, temperatures and pressures
TL;DR: In this paper, a cumulative-damage fracture model is introduced which expresses the strain to fracture as a function of the strain rate, temperature and pressure, and the model is evaluated by comparing computed results with cylinder impact tests and biaxial (torsion-tension) tests.
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On the ductile enlargement of voids in triaxial stress fields
James R. Rice,D.M. Tracey +1 more
TL;DR: In this article, a variational principle is established to characterize the flow field in an elastically rigid and incompressible plastic material containing an internal void or voids, and an approximate Rayleigh-Ritz procedure is developed and applied to the enlargement of an isolated spherical void in a nonhardening material.