International Journal of Mechanics and Materials in Design ( IF 3.7 ) Pub Date : 2019-05-11 , DOI: 10.1007/s10999-019-09457-x Masumeh Abdollahzadeh , Seyed Hamed Hoseini , Shirko Faroughi
In this study the superelastic behavior of porous shape memory alloys has been simulated in a finite element procedure. The Boyd and Lagoudas plasticity like phenomenological model (Lecce and Concilio in Shape memory alloy engineering: for aerospace, structural and biomedical application, Elsevier, Oxford, 2016) has been developed by incorporating the pore volume fraction parameter to describe the behavior of porous shape memory alloys. Accordingly, to homogenize the porous media, Young’s modulus and the phase transformation function have been defined as functions of pore volume fraction. Furthermore, for random distribution of pores, Bernoulli process has been implemented. A numerical procedure was proposed and executed by a finite element code based on the proposed constitutive model. In finite element models, each pore was defined as a negligible stiffness element. Simulations show that the proposed model could precisely simulate the superelastic behavior of porous SMAs under tensile loading.
中文翻译:
多孔形状记忆合金的超弹性行为建模
在这项研究中,已经在有限元程序中模拟了多孔形状记忆合金的超弹性行为。通过结合孔隙体积分数参数来描述多孔形状记忆的行为,开发了Boyd和Lagoudas像现象学模型那样的可塑性(形状记忆合金工程中的Lecce和Concilio:用于航空航天,结构和生物医学应用,Elsevier,牛津,2016年)。合金。因此,为了使多孔介质均匀化,杨氏模量和相变函数被定义为孔体积分数的函数。此外,对于孔的随机分布,已经实施了伯努利工艺。提出了一种数值程序,并基于所提出的本构模型由有限元代码执行。在有限元模型中 每个孔定义为可忽略的刚度元素。仿真表明,该模型可以精确模拟多孔SMA在拉伸载荷作用下的超弹性行为。