拟弹性SMA对复合材料板抗低速冲击响应性能的影响  

STUDY ON THE LOW-VELOCITY IMPACT RESPONSE OF A COMPOSITE PLATE IMPROVED BY THE PSEUDO-PROPERTY OF SMA

作　　者：吴莹[1] 吴永东[1] 钟伟芳[1] 

机构地区：[1]华中科技大学力学系,武汉430074

出　　处：《固体力学学报》2010年第1期23-31,共9页Chinese Journal of Solid Mechanics

基　　金：教育部科学技术研究重点项目(00085)资助

摘　　要：以形状记忆合金(SMA)纤维增强复合材料板为研究对象,根据SMA拟弹性曲线的特性,建立了一种SMA拟弹性应力-应变关系的分段线性化模型;在此基础上,采用分步能量平衡法,求解了SMA增强复合材料板受低速冲击时的横向位移和应力,分析了SMA的拟弹性特性对复合材料板低速冲击性能的影响.研究结果表明,SMA的能量吸收特性能有效地增强复合材料板抗低速冲击能力,板的最大位移和最大应力都明显减少.冲击速度为10m/s的情况下,板的最大挠度和应力降低了18%左右;冲击速度为25 m/s的情况下,板的最大挠度和应力降低了42%左右.In this paper, improving the low velocity impact responses property of SMA hybrid composite plate is investigated by using the method of piecewise energy balance. First, the hysteresis loop of SMA is linearized piecewise, and the linear constitutive equations are established. Second, the energy balance equations of SMA hybrid composite plate subjected to low velocity impact are derived. Third, improvement on the low velocity impact responses of SMA hybrid composite plate is analyzed by using the method of piecewise energy balance. Numerical results show that SMA can effectively improve the low velocity impact response performance of composite structures. The maximum deflection and stress of a SMA hybrid composite plate have been reduced approximately by 18% at V0 = 10 m/s; and approximately by 42% at V0=25 m/s when the fraction of the embeded SMA reaches 0.3.

关 键 词：形状记忆合金 低速冲击 拟弹性 能量法 

分 类 号：O347.3[理学—固体力学]