摘要
为了克服航空发动机变形齿在循环使用过程中容易出现螺栓松弛和脱落等问题,本研究拟将呈梯度分布状态的形状记忆合金材料应用于航空发动机变形齿的设计中,构成由碳纤维复合板基片和形状记忆合金材料梯度复合而成的功能梯度变形齿装置。首先,给出了呈梯度分布状态的形状记忆合金复合材料层合板在变温作用下的热弹性本构模型;然后,对形状记忆合金层合板进行不同层数和组分含量设计,根据不同设计方案对航空发动机变形齿装置进行有限元建模,仿真分析该装置在变温作用下的应力分布、尖端挠度和应变分布等热力学性能;最后,结合正交分析,讨论不同设计因素对变形齿力学性能的影响。本工作可为形状记忆合金智能材料的进一步研究及其在航空航天等领域的工程应用提供理论基础与技术支撑。
The variable geometry chevron(VGC)of aeroengine commonly suffered from flaws like bolt loosening and falling off during the cyclic service process.Aiming at solving this problem,we intended to introduce the functional gradient shape memory alloy into the design of aeroengine VGC,and further obtain a functional gradient VGC device consisted of a carbon fiber composite plate substrate and a shape memory alloy.Firstly,the thermoelastic constitutive model of shape memory alloy composite laminates with functionally gradient distribution was established.Then,the shape memory alloy laminates were designed with various layers and component contents,and the finite element modeling of the aeroengine VGC device was performed in light of diverse design schemes.Further simulation analysis on the thermodynamic properties of the VGC device,including stress distribution,tip deflection and strain distribution under the action of temperature variation was conducted according to the finite element modeling.Finally,the impact of different design factors on the mechanical properties of VGC was discussed with reference to the orthogonal analysis.Our research findings may pave the way for further research of novel shape memory alloy intelligent materials and their engineering applications in aerospace and related fields.
作者
刘兵飞
刘艳艳
周蕊
LIU Bingfei;LIU Yanyan;ZHOU Rui(Aeronautical Engineering Institute,Civil Aviation University of China,Tianjin 300300,China;Sino-European Institute of Aviation Engineering,Civil Aviation University of China,Tianjin 300300,China)
出处
《材料导报》
EI
CAS
CSCD
北大核心
2020年第2期2117-2122,2158,共7页
Materials Reports
基金
国家自然科学基金(11502284
51608522
51505483)
中央高校基本科研业务费(3122018D018)~~
关键词
航空发动机变形齿
功能梯度材料
形状记忆合金
有限元
variable geometry chevron for aeroengine
functional gradient materials
shape memory alloy
finite element
