摘要
对一形状记忆合金(SMA)电线的体积分数、方向、沿厚度定位等的优化处理,可将内含SMA电线的组合板在低速撞击中的最大横向挠度减至最小。智能组合结构中SMA电线几何特性优化处理的好坏对于后续的工作非常重要。利用表面响应法(RSM)对一个有效精确模型进行研究(该模型能够计算内含SMA电线的智能组合板的挠度),该方法可以将挠度比构建为一个数学函数。在试验中采用了一阶剪力变形理论、傅里叶级数和板的微分控制方程等分析方法。采用一个由springs-masses组成的含有2个自由度的系统来模拟撞击物和板的交互作用。同时采用了一个非线性数学模型,用于模拟SMA电线中的体积分数和分层顺序(方向和沿厚度定位)。结果显示:相比其他影响因素,体积分数在结构优化设计中尤为重要。
Optimization of the volume fraction, the orienta tion and the through thickness location of the shape memory alloy （SMA） wires was used in order to minimize the maximum transverse deflection of the hybrid composite plate during the low-velocity impact phenomena. The prediction of optimal conditions of good geometrical properties of SMA wires in smart hybrid composites pfays an important role in process planning. The present work deals with the study and development of a verified strict model for smart composite plate deflection, which embedded with the SMA wires, u- sing response surface method （RSM）. This method helped us to estimate deflection ratio as a mathematical function of the main process planning parameters. The experimentation was carried out with the first-order shear deformation theory, the Fourier series method and solving analytically the system of governing differential equations of the plate. The interaction between the impactor and the plate also modeled with a system having two-degrees-of-freedom, consisting of springs-masses. A nonlinear mathematical model, in terms of the volume fraction and layer sequence （the orientation and the through thickness location） of the SMA wires was delivered. The results indicated that the volume fraction is a more important factor affecting the optimization and the design process of the structures.
出处
《钢结构》
2009年第2期76-77,共2页
Steel Construction
关键词
撞击
智能结构
形状记忆合金(SMA)
组合
表面响应法
衰退
Impact
Smart structure
Shape memory alloy （SMA）
Composite
Response surface method （RSM）
Regression
