航空发动机变形齿的新材料设计与力学性能

doi:10.11896/cldb.18110092

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Abstract 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.

Key words： variable geometry chevron for aeroengine functional gradient materials shape memory alloy finite element

Published: 03 January 2020

CLC number:

V232

About author:: Bingfei Liu, associate professor of Civil Aviation University of China, master's tutor, Ph.D. in solid mechanics, Beijing Jiaotong University. His research directions are intelligent materials and structural mecha-nics. He has presided over or participated in many projects at various levels, and has published many papers in SCI, EI, Peking University core journals;Rui Zhou, born in 1983, Ph.D., the main research direction is plastic forming theory and numerical simulation research.

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Cite this article:

LIU Bingfei,LIU Yanyan,ZHOU Rui. Innovative Material Design and Mechanical Properties Study of Variable Geometry Chevron for Aeroengine[J]. Materials Reports, 2020, 34(2): 2117-2122.

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http://www.mater-rep.com/EN/10.11896/cldb.18110092 OR http://www.mater-rep.com/EN/Y2020/V34/I2/2117

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