摘要
建立了TiNiFe形状记忆合金管接头变形和恢复两个过程的三维本构模型,采用有限元分析方法,对内脊型管接头组件的应力分布和拉脱力进行模拟,分别研究了内脊和脊高对拉脱力的影响.模拟所用到的TiNiFe合金材料参数由实验测得.结果表明:内脊的引入能够提高连接组件的拉脱力,在计算范围内,随脊高增加拉脱力线性增大.拉脱力实测值与模拟结果吻合较好,数值偏差在4%以内.
Dimension design is a key aspect for shape memory pipe coupling, and determines the connecting strength of the connecting unit. Numerical simulation provides a theoretical basis for dimension design. In this paper, a three-dimensional constitutive model was developed to simulate the deformation and recovery process of TiNiFe shape memory pipe coupling. Finite element method is applied to simulate the stress distribution and pull-out force of the connecting units. Properties of TiNiFe alloy used in the simulation are measured from experiments. The influences of the inner convex and its height on the pull-out force are investigated. The simulated results reveal that the inner convex increases the pull-out force of the connecting units, which increases linearly with the height of the inner convex within the scope of simulations. The experimental results are in good agreement with the simulated pull-out forces with a deviation of less than 4%.
出处
《金属学报》
SCIE
EI
CAS
CSCD
北大核心
2012年第12期1520-1524,共5页
Acta Metallurgica Sinica
关键词
TiNiFe
形状记忆
管接头
本构方程
有限元
TiNiFe, shape memory, pipe coupling, constitutive equation, finite element
