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首页> 外文期刊>Composites. B >Large bending actuator made with SMA contractile wires: theory, numerical simulation and experiments
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Large bending actuator made with SMA contractile wires: theory, numerical simulation and experiments

机译：SMA收缩线制成的大型弯曲执行器：理论，数值模拟和实验

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摘要

In this paper, the modeling, numerical simulation and experimental validation of the deformation of a composite cantilever beam actuated by shape memory alloy (SMA) wires are presented and discussed. The structural model incorporates a number of non-classical features such as laminated construction and anisotropy of constituent material layers, transverse shear deformability, distortion of the normals, and fulfillment of interfacial shear traction continuity requirement. Suitable for use in standard finite element codes, a numerical procedure is developed for solving the geometric non-linearity of the host structure and the hysteretic non-linearity of SMA wires, which is based upon the updated Lagrangian formulation. The application concerns an elastomeric beam with embedded and pre-stressed SMA wires at an offset from the neutral axis, which act as large bending actuators resulting from the thermally induced reversible tranformation strains. The experiments and numerical simulation demonstrate the good predictive capability of the model proposed and the powerful role played by SMAs as large bending actuators.
机译：本文提出并讨论了形状记忆合金（SMA）线驱动的复合悬臂梁变形的建模，数值模拟和实验验证。结构模型结合了许多非经典特征，例如层压结构和组成材料层的各向异性，横向剪切变形能力，法线变形以及满足界面剪切牵引连续性要求。基于更新的拉格朗日公式，开发了一种适用于标准有限元代码的数值程序，用于求解主体结构的几何非线性和SMA线的滞后非线性。该申请涉及一种弹性梁，该弹性梁在与中性轴偏移的位置具有嵌入的预应力SMA线，这些线可作为由热诱导的可逆变形应变产生的大型弯曲致动器。实验和数值模拟证明了所提出模型的良好预测能力以及SMA作为大型弯曲致动器的强大作用。

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