基于等效热弹性应变能的智能变形蒙皮模拟分析及实验  

Numerical and experiment of morphing skin based on equivalent thermoelastic energy method

作　　者：张伟[1,2] 麻越垠[1,2] 蔡清青 高鑫宇[1] 聂旭涛 ZHANG Wei;MA Yueyin;CAI Qingqing;GAO Xinyu;NIE Xutao(College of Aerospace Science and Engineer,National University of Defense Technology,Changsha 410073,China;Facility Design and Instrumentation Institute,China Aerodynamics Research and Development Center,Mianyang Sichuan 621000,China)

机构地区：[1]国防科技大学空天科学学院,长沙410073 [2]中国空气动力研究与发展中心设备设计与测试技术研究所,四川绵阳621000

出　　处：《航空动力学报》2024年第11期43-54,共12页Journal of Aerospace Power

基　　金：中国空气动力研究与发展中心基础和前沿技术研究基金探索项目(PJD20200240)。

摘　　要：为简化记忆合金建模,提出了一种等效模拟方法,将形状记忆合金相变能转化为弹性基体的热弹性应变能,并以温差形式表达。以形状记忆合金丝为对象,开展了该方法和Boyd-Lagoudas扩展模型的对比分析。基于Boyd-Lagoudas扩展模型编写的自定义物性子程序,除了常规的退孪马氏体和奥氏体,还考虑了孪晶马氏体以提高模拟分析的准确性。等效模型的最大误差为9.8%,验证了方法的有效性和准确性。针对不锈钢及单程记忆合金组成的主动变形蒙皮,等效方法计算的机翼弧高变化幅值为4.03 mm,和实验值3.81 mm吻合,降低了数值模拟难度和计算消耗,表明该方法有助于开展机翼模型的全尺寸模拟研究,并用于设计快速迭代。To simplify the modeling,an equivalent simulation method was proposed to convert the transformation energy of SMA into the thermoelastic strain energy of elastic plate and express it by temperature difference.The equivalent approach and Boyd-Lagoudas extended model were compared and analyzed for a SMA wire model.According to the compiled physical property subroutine of SMA based on the Boyd-Lagoudas extended model,twinned martensite other than conventional detwinned martensite and austenite was considered.The maximum error of the equivalent model was 9.8%,proving its effectiveness and accuracy.For the active morphing skin composed of stainless steel and one-way SMA,the variation magnitude of the wing arc height calculated by the equivalent approach was 4.03 mm,consistent with the experimental value of 3.81 mm.It indicated that the equivalent thermoelastic energy method was effective to carry out full-scale wing simulation and rapid design iteration.

关 键 词：变形蒙皮 热弹性应变能 形状记忆合金 等效方法 有限元分析 

分 类 号：V259[一般工业技术—材料科学与工程]