摘要
飞行器飞行过程中气动加热造成的"热障"具有瞬态(短时)高温的特征,在这一瞬态高温环境下,由于温度和时间因素的共同参与,使飞行器结构材料的强度问题变得极其复杂,常规的稳态(长时)高温力学性能已不能体现材料"热障"环境下的特征。本文提出了一种气动热环境下的材料力学性能测试技术,并以GH3039合金为例,对测试技术进行了系统性验证。该技术能够模拟飞行器飞行过程中的实际气动热环境,开展飞行器结构材料瞬态高温条件下的力学性能测试,获得材料"热障"服役环境下的真实强度信息,为飞行器结构材料高温力学性能测试提供了一个新的思路和发展方向。
The"thermal barrier"caused by aerodynamic heating during flight of the aircraft has the characteristics of transient(short-term)high temperature.In this transient high-temperature environment,the strength of the structural material of the aircraft becomes extremely complicated due to temperature and time effects.Conventional steady-state(long-term)high-temperature mechanical properties can no longer reflect the characteristics of the material"thermal barrier"environment.In this paper,a test technique for mechanical properties of materials under aerodynamic thermal environment is proposed and systematically verified with the GH3039 alloy.Actual aero-thermal environment can be simulated,mechanical performance of the structural materials at transient high temperatures can be tested,and the real strength information in the "thermal barrier"service environment can be obtained.This technology provides a new idea and development direction for testing the high temperature mechanical properties of aircraft structural materials.
作者
王美玲
孙冬柏
赵飞
阳建宏
王凤平
WANG Mei-ling;SUN Dong-bai;ZHAO Fei;YANG Jian-hong;WANG Feng-ping(National Centre for Material Service Safety, University of Science and Technology of Beijing, Beijing 100083, China;School of Materials Science and Engineering, Sun Yat-sen University, Guangzhou 510275, China;School of Mechanical Engineering, University of Science and Technology of Beijing, Beijing 100083, China)
出处
《实验力学》
CSCD
北大核心
2019年第2期275-283,共9页
Journal of Experimental Mechanics
基金
国家重大科学仪器设备开发专项(2011YQ14014505)
中央高校基本科研业务费(FRF-OT-17-016)
关键词
气动热环境
热障
高温力学性能
aero-thermal environment
thermal barrier
high-temperature mechanical properties
