Modeling of superelastic behavior of porous shape memory alloys

Abdollahzadeh, Masumeh; Hoseini, S.H.; Faroughi, Shirko

doi:10.1007/s10999-019-09457-x

Cited by 8 publications

(2 citation statements)

References 30 publications

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“…In order to simplify the structure and reduce the computational cost of analysis of such a non-homogenous structure, it is usual to consider a representative volume element (RVE) (Abdollahzadeh et al, 2020; Gilabert et al, 2017a; Guven and Cinar, 2019). The model is a cubic matrix with dimensions of 10 mm × 10 mm × 10 mm.…”

Section: Simulation Methodologymentioning

confidence: 99%

Self-healing performance of a microcapsule-based structure reinforced with pre-strained shape memory alloy wires: 3-D FEM/XFEM modeling

Taheri-Boroujeni

Ashrafi

2023

Journal of Intelligent Material Systems and Structures

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Combination of microcapsules and shape memory alloys (SMAs) is one of the promising self-healing mechanisms. Although there are several parameters which affect the performance of such structures, limited studies are performed on this combined healing mechanism. In this work, we study the performance of such a composite structure using a 3-D finite element and extended finite element model consisting of matrix, glass microcapsule, healing agent, and Ni-Ti SMA wire. After examining the results, the effect of shape memory alloy wires on increasing the maximum fracture stress was observed. Moreover, the effect of radius of shape memory alloy wires, initial crack location, thickness ratio and volume fraction of microcapsules, and interface strength on ultimate fracture stress are investigated. Also, as a key parameter in self-healing performance, the crack opening distance decreased from 5 to 0.008 μm using 0.5% volume fraction of shape memory wires without pre-strain. In the case that the wires have a pre-strain of 1%, this value reaches almost zero and a compressive stress is induced between fracture surfaces which can enhance the healing process and adherence of healing agent.

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Section: Simulation Methodologymentioning

confidence: 99%

Self-healing performance of a microcapsule-based structure reinforced with pre-strained shape memory alloy wires: 3-D FEM/XFEM modeling

Taheri-Boroujeni

Ashrafi

2023

Journal of Intelligent Material Systems and Structures

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“…Porous shape memory alloys combine the advantages of shape memory alloys such as super elasticity and shape memory effect. The computational micromechanical analysis of porous SMAs using finite element methods has become one of the most common methods [74,75]. Currently, fewer studies have been conducted on the functional fatigue simulation of Ni-Ti porosity, and most of them have evaluated the shape memory properties in a single pass [16,76,77], with less research on the super-elasticity under cyclic loading and the shape memory effect [18,78].…”

Section: Modeling For the Functional Fatigue Simulationmentioning

confidence: 99%

New Insights into the Mechanical Properties, Functional Fatigue, and Structural Fatigue of Ni-Ti Alloy Porous Structures

Tang

Liu

2023

Metals

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Ni-Ti shape memory alloys (SMAs) are widely noticed and have captured great interest due to their unique shape memory effect and super elasticity. Porous Ni-Ti SMAs have the typical characteristics of both porous metals as well as shape memory alloys. Because of the uneven stress distribution, cyclic loading has a more significant effect on the phase transformation and plastic deformation of Ni-Ti porous compared with Ni-Ti bulk. This paper overviews the structural and functional fatigue experiments and numerical simulation progress of Ni-Ti porous. The factors affecting the fatigue performance of the Ni-Ti lattice structure and the methods for enhancing its fatigue performance are elaborated. More importantly, the point of the coupling analysis of structural fatigue performance and functional fatigue performance is proposed for the study of porous Ni-Ti shape memory alloys.

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A nonlinear finite element method for analyzing the bending behavior of functionally graded shape memory alloys under the loading process

Jia

et al. 2023

Arch Appl Mech

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Modeling of superelastic behavior of porous shape memory alloys

Cited by 8 publications

References 30 publications

Self-healing performance of a microcapsule-based structure reinforced with pre-strained shape memory alloy wires: 3-D FEM/XFEM modeling

Self-healing performance of a microcapsule-based structure reinforced with pre-strained shape memory alloy wires: 3-D FEM/XFEM modeling

New Insights into the Mechanical Properties, Functional Fatigue, and Structural Fatigue of Ni-Ti Alloy Porous Structures

A nonlinear finite element method for analyzing the bending behavior of functionally graded shape memory alloys under the loading process

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