1,721,211 research outputs found
Shape Memory Alloys: Material Modeling and Device Finite Element Simulations
No full textThe use of shape memory alloys (SMA) in an increasing number of applications in many fields of engineering, such as biomedical engineering, is leading to a growing interest toward an exhaustive modeling of their macroscopic behavior in order to construct reliable simulation tools for SMA devices. In this paper we review a robust three-dimensional model able to reproduce both pseudo-elastic and shape-memory behaviors and we report numerical studies where it is used for the simulation of SMA-based biomedical devices
A One-Dimensional Model Describing Stress-Induced Solid Phase Transformation with Residual Plasticity
No full textAn isogeometric collocation approach for Bernoulli-Euler beams and Kirchhoff plates
No full textIn this paper, IGA collocation methods are for the first time introduced for the solution of thin structural problems described by the Bernoulli-Euler beam and Kirchhoff plate models. In particular, a precise description of the proposed methods, of the relevant implementation details, and of the strategy to efficiently deal with different combinations of boundary conditions is given. Finally, several numerical experiments confirm that the proposed formulations represent an efficient and geometrically flexible tool for the simulation of thin structures
On the application of curve reparameterization in isogeometric vibration analysis of free-from curved beams
No full textA macroscopic 1D model for shape memory alloys including asymmetric behaviors and transformation-dependent elastic properties
Full text linkThe research toward an exhaustive modeling of the macroscopic behavior of shape memory alloys (SMAs) has been widely growing in last years because of the increasing employment of such smart materials in a large number of applications in many fields of engineering. Within this context, it has to be remarked that many models for SMAs available in the literature are able to properly reproduce main macroscopic SMA behaviors (i.e., superelasticity and shape-memory effect), without however modeling secondary effects that may turn out to be relevant in some practical cases. In this paper, we propose a new phenomenological one-dimensional model, which takes into account tension-compression asymmetries as well as elastic properties depending on the phase transformation level, combined with a good description of the superelastic and shape-memory behaviors. Moreover, we present some numerical tests showing model features and performance
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