Showing papers in "International Journal of Plasticity in 2000"

TL;DR: In this paper, the formation of twins, α- and e- martensite during plastic deformation was analyzed by optical microscopy, X-ray diffraction, scanning electron microscopy (SEM) and transmission electron microscope (TEM).

TL;DR: In this paper, a modified constitutive law for elastic plastic phase changing materials is presented, based on the concept of transformation induced plasticity (TRIP) in steel, which is investigated both experimentally and theoretically.

TL;DR: In this article, the performance of five constitutive models in predicting ratcheting responses of carbon steel for a broad set of uniaxial and baoxial loading histories is evaluated.

TL;DR: In this article, a new kinematic hardening model useful for simulating the steady-state in ratchetting is developed within the framework of the strain hardening and dynamic recovery format.

TL;DR: In this paper, a theory of material growth (mass creation and resorption) is presented in which growth is viewed as a local rearrangement of material inhomogeneities described by means of first and second-order uniformity transplants.

TL;DR: In this article, a formulation of elastic-plastic theory for rate independent materials is described, based on the use of thermodynamic potentials, and a systematic presentation is made of 16 possible ways of formulating constitutive behaviour within this framework.

TL;DR: In this paper, a thermomechanical description of the martenstitic phase transformation and the associated shape memory effect in polycrystalline shape memory alloys (SMAs) is presented.

TL;DR: In this article, Bruhns et al. formulate constitutive laws of finite thermoviscoplasticity in the strain space and apply them to finite non-isothermal deformations.

TL;DR: In this paper, a special plasticity-based constitutive model used within a 3-D finite element framework has been shown to capture the isothermal, purely mechanical front features seen in experiments of thin uniaxial NiTi strips.

TL;DR: In this article, the authors conducted a systematic series of experiments to assess the influence of both temperature and stress state type on the kinetics of martensitic transformation in stainless steels.

TL;DR: In this paper, a micromechanical model is developed to predict the conditions of nucleation and growth of a martensitic microdomain inside an inhomogeneous plastic strain field.

TL;DR: In this article, a viscoplastic constitutive model of cyclic plasticity was proposed on the premise that the sharp yield point and the subsequent abrupt yield drop result from rapid dislocation multiplication and the stress-dependence of dislocation velocity.

TL;DR: In this paper, a constant stress averaging approach is employed to model the SMA polycrystal deformation behaviors, based on the knowledge of the anisotropy associated with the martensitic transformations obtained from tension/compression experiments with oriented CuAlNi single crystals.

TL;DR: Barlat et al. as mentioned in this paper proposed a nonquadratic yield function for aluminum alloy sheet, which simultaneously accounts for the anisotropy of uniaxial yield stresses and r values.

TL;DR: In this article, a general 3D multivariant model for shape memory alloy constitutive behavior is further developed based on the habit planes and transformation directions for variants of martensite and uses a thermodynamic and micromechanics approach to develop the governing equations for thermomechanical response.

TL;DR: In this article, a macroscopic description for the simulation of the two way shape memory effect (TWSME) of shape memory alloys (SMA), and an extension of a previous work dealing with the global thermomechanical behavior of SMA is presented.

TL;DR: In this paper, a combination of Marciniak-Kuczynski analysis and a general anisotropic yield criterion was used to predict localized thinning of sheet metal alloys for linear and nonlinear strain paths.

TL;DR: In this article, a series of uniaxial and baoxial tests has been carried out in order to calibrate five different cyclic plasticity models based on an isotropic hardening rule and a non-linear kinematic hardening rules.

TL;DR: In this paper, a comprehensive study on the response of nanocrystalline iron and copper to quasi-static and dynamic loading is reported, which is based on the KHL model modified by incorporating Hall-Petch relation.

TL;DR: In this article, a critical intervoid ligament distance (ILD) was proposed to define void coalescence that is derived from micromechanical simulations in which void volume fraction evolves as a function of strain.

TL;DR: In this paper, the influence of grain boundaries and grain misorientations on stress-induced martensitic transformations in NiTi was studied using unique experiments and finite element modeling, and it was shown that grains that are favorably oriented with respect to the loading axis create local stresses that invariably assist the transformation in neighboring grains.

TL;DR: In this article, a new strain-induced martensitic transformation kinetics model and constitutive equation of TRIP steels are proposed by considering the dependence of the austenitic grain size.

TL;DR: In this article, an averaging scheme is developed to simulate the behavior of a polycrystalline shape memory alloy (SMA) specimen using the Multivariant Micromechanics approach.

TL;DR: In this paper, a phenomenological finite deformation elastoplasticity theory is proposed by consistently combining the additive decomposition of the stretching D and the multiplicative deformation gradient F.

TL;DR: In this article, the authors measured the X-ray diffraction and crystallite orientation distribution functions (ODF) of the texture of the roll-and-deposited thin plates and thin films for microactuators.

TL;DR: In this paper, an analytical and numerical study of void growth in porous ductile solids arising from the presence of two populations of cavities very different in size is presented, based on the model problem of some hollow sphere made of porous plastic material and subjected to hydrostatic tension.

TL;DR: Khan et al. as mentioned in this paper presented non-proportional torsion-tension and biaxial-compressive experimental results on tantalum, tantalum alloy with 2.5% tungsten, and AerMet 100 steel.

TL;DR: In this article, the influence of martensitic transformation latent heat on the superelastic behavior modelling is investigated. But the authors assume that the temperature field remains uniform but different to the test temperature imposed.

TL;DR: In this article, simulations of stretch flange forming operations are undertaken using explicit dynamic finite element calculations utilizing various quadratic and non-quadratic yield criteria. And the results from a model of an automotive inner component incorporating a cut-out with stretch-flange corner features are also presented.

TL;DR: In this paper, a viscoplastic constitutive model was extended to apply to the cyclic deformation analysis of the modified 9Cr-1Mo steel, which was applied to simulations of inelastic deformation behavior under monotonic tension, stress relaxation, creep, isothermal cyclic deformations including stress relaxation and anisothermal cyclics deformations.