Πλοήγηση ανά Θέμα "Plasticity"
Αποτελέσματα 1-20 από 33
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Buckling of unconfined and confined thin-walled steel cylinders under external pressure
(2008)The present paper investigates the structural stability of thin-walled steel cylinders subjected to uniform external pressure. A brief discussion of unconfined steel cylinder buckling is presented first. Subsequently, ... -
Constitutive and transformation kinetics modeling of ε-, α′-Martensite and mechanical twinning in steels containing austenite
(2022)In the present study, a physically based constitutive and transformation kinetics model of stress assisted (SA) and strain induced (SI) ε-, α′-Martensite and twinning in steels containing austenite, is presented. The ... -
Constitutive modeling and finite element methods for TRIP steels
(2006)A constitutive model that describes the mechanical behavior of steels exhibiting "TRansformation Induced Plasticity" (TRIP) during martensitic transformation is presented. Multiphase TRIP steels are considered as composite ... -
Deformation vs. flow and wavelet-based models of gradient plasticity: Examples of axial symmetry
(2006)The modest goal of this article - the first in a series of three dedicated to Kirk Valanis - is to discuss and compare (in terms of their constitutive and variational formulation, boundary conditions and size-dependent ... -
Exploitation of the TRIP effect for the development of formable, fracture and fatigue resistant steels for automotive applications
(2009)The present paper summarizes recent and on-going work on the exploitation of TRansformation-Induced Plasticity (TRIP) in an effort to develop automotive steels which would possess high-strength combined with high formability ... -
Fatigue behavior and retained austenite transformation of Al-containing TRIP steels
(2016)In material selection for the design of advanced lightweight automotive steel components, fatigue performance is of particular significance. High strength TRIP steels offer very good cyclic behavior, especially under cyclic ... -
Fatigue of materials - Influence of microstructure and processing effect of overaging on fatigue crack propagation of 2024 T3 aluminum alloy
(2013)The effect of controlled overaging on fatigue crack propagation (Stage II) in 2024-T3 aluminum alloy was experimentally investigated. Overaging was performed by subjecting the material from initial T3 state to appropriate ... -
Fiber plasticity and loss of ellipticity in soft composites under non-monotonic loading
(2022)In this work, we relate fiber plasticity in soft composites to the loss of ellipticity of the governing equations of equilibrium of a composite under non-monotonic uniaxial loading. The loss of ellipticity strongly indicates ... -
Finite element analysis of damage in pipeline bends
(2010)The present paper describes a numerical formulation for the analysis of damage in steel pipeline bends. In particular, the numerical implementation of Gurson plasticity model is described in the framework of a special ... -
Finite element implementation of gradient plasticity models part I: Gradient-dependent yield functions
(1998)Theories with intrinsic or material length scales find applications in the modeling of size-dependent phenomena such as, for example, the localization of plastic flow into shear bands. In gradient-type plasticity theories, ... -
Finite element implementation of gradient plasticity models Part II: Gradient-dependent evolution equations
(1998)The variational formulation and finite element implementation of a class of plasticity models with gradient-dependent yield functions is covered in detail in Part I. In this sequel, attention is focussed upon the finite ... -
Finite element modeling of trip steels
(2004)In this paper, a constitutive model that describes the mechanical behavior of steels exhibiting the "Transformation Induced Plasticity" (TRIP) phenomenon during martensitic transformation is presented. Multiphase TRIP ... -
A framework for formulating and implementing non-associative plasticity models for shell buckling computations
(2022)In modelling the behavior of thick-walled metal shells under compressive loads, the use of J2 flow theory can lead to unrealistic buckling estimates, while alternative ‘corner’ models, despite offering good predictions, ... -
An implicit numerical scheme for cyclic elastoplasticity and ratcheting under plane stress conditions
(2021)The paper reports the development of an implicit numerical scheme for plane stress cyclic elasto-plasticity, capable of integrating a wide range of hardening rules, and simulating multi-axial ratcheting in metal structural ... -
Interplay between deformation behavior and mechanical properties of intercritically annealed and tempered medium-manganese transformation-induced plasticity steel
(2016)We elucidate the mechanistic contribution of the interplay between microstructural constituents and plastic deformation behavior of a hot rolled Fe-0.18C-10.62Mn-4.06Al-0.03Nb transformation-induced plasticity (TRIP) steel ... -
An investigation into abrasive water jet machining of TRIP sheet steels using Taguchi technique and regression models
(2013)An experimental investigation of abrasive water-jet machining (AWJM) of transformation induced plasticity (TRIP) multi-phase sheet steels using design of experiments was carried out. The quality characteristics selected ... -
Multi-phase field modeling in TRIP steels: Distributed vs. average stability and strain-induced transformation of retained austenite
(2022)Austenite stability and dispersion are key parameters controlling the strain-induced transformation of Retained Austenite (RA) to martensite in TRIP steels. Stabilization is achieved through a two-stage heat-treatment ... -
Non-associative J2 plasticity model for finite element buckling analysis of shells in the inelastic range
(2016)The development and numerical implementation of a special-purpose constitutive model is described for investigating the structural stability of cylindrical metal shells under axial compression and bending, which buckle in ... -
Numerical implementation of J 2 non-associative flow plasticity models
(2009)The present paper describes a J2 non-associative plasticity model, which takes into account the "corner-like" effects at the loading point on the yield surface, and is suitable for shell buckling calculations. The plastic ... -
Numerical modelling of steel pipelines subjected to severe monotonic and cyclic straining
(2014)Offshore and onshore pipelines may experience extreme loading conditions during their installation and operation, both of monotonic and cyclic nature. Loading actions such as pipeline lateral displacements, tensioning, or ...