Modeling bending behavior of shape memory alloy wire-reinforced composites:Semi-analytical model and finite element analysis

• 作者: Nguyen Van VIET Wael ZAKI
• 来源期刊: 中国航空学报（英文版）
• 年，卷（期）: 2021,（8）
• 所属期刊栏目: Special Topic-Modeling and Simulation in Design and Manufacture of Composite Structures
• 页码范围: 176-191
• 页数: 16页
• 语种: 英文

摘要

In this study,we propose a novel and simple exact semi-analytical model for superelastic Shape Memory Alloy (SMA) wire reinforced composites subjected to bending loads.In order to study the mechanical response of the composite during loading/unloading,a Representative Vol-ume Element (RVE) is extracted to examine the bending response of the composite.Analytical moment-curvature,and shear force-shear strain relations are derived based on a 3-Dimensional(3D) thermomechanical SMA model and Timoshenko beam theory.The composite Simpson's rule is adopted to numerically solve the exact analytical moment-curvature and shear force-shear strain relationships.Results including the moment-curvature response,axial stress distribution along the vertical and longitudinal directions,martensite volume fraction,and the tip deflection are reported and validated against 3D finite element simulations.The influence of temperature,martensite vol-ume fraction distribution,and matrix stiffness on the mechanical performance of the composite is also investigated.In particular,the composite is found to behave superelastically under certain con-ditions of temperature,SMA volume fraction,and elastic stiffness of the matrix.Such behavior is advantageous in applications requiring large recoverable strains or high energy dissipation density.