A beam model of porous shape memory alloy deformation

被引：3
作者：
Volkov, Aleksandr E. [1 ]
Evard, Margarita E. [1 ]
Iaparova, Elisaveta N. [1 ]
机构：
[1] St Petersburg State Univ, 7-9 Univ Skaya Nab, St Petersburg 199034, Russia
来源：
MATERIALS TODAY-PROCEEDINGS | 2017年 / 4卷 / 03期
关键词：
Shape memory; porous TiNi shape memory alloy; modeling; BEHAVIOR; NITI; TRANSFORMATION; ACCUMULATION; IMPLANTS; PHASE;
D O I：
10.1016/j.matpr.2017.04.042
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
A model for simulation of functional-mechanical properties of porous TiNi shape memory alloy samples fabricated by self-propagating high temperature synthesis has been proposed. A sample is considered to consist of pores and ligaments allowing an account of the main sample structural features associated with synthesis conditions. The longitudinal ligaments are approximated by curved beams; the groups of transversal ligaments are regarded as flat slotted springs. An analysis of shapes and sizes of pores and ligaments allows identifying characteristic sizes of the beams. A microstructural model is used for calculation of the phase deformation of the shape memory material. Simulation of stress-strain curves at different temperatures and phase deformation of a porous TiNi sample on cooling and heating under a constant stress has shown a good agreement with experimental data. (C) 2017 Elsevier Ltd. All rights reserved.
引用
收藏
页码：4631 / 4636
页数：6
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