摘要
智能材料结构在众多领域应用广泛,为防止智能材料结构在使用时发生疲劳失效,研究智能材料结构的疲劳可靠性问题有着重要意义。本文从疲劳失效的微观表征、疲劳试验的宏观现象以及疲劳可靠性问题的研究方法等角度,分析了裂纹对压电传感器性能的影响,探究了压电换能器在振动能量回收中发生疲劳失效的机理。阐述了形状记忆合金发生结构性疲劳的微观机理以及发生功能性疲劳对驱动器使用寿命的影响。对传统夹层结构疲劳问题的研究方法进行了总结,在此基础上结合变体结构等效强度模型讨论了变体结构的疲劳失效问题。最后,对以上几种智能材料结构疲劳可靠性问题的后续研究做出了展望。
Smart material structures have broad applications in the field of aerospace engineering.In order to prevent the fatigue failure of smart material and structures,it is important to investigate the fatigue reliability of smart material structures.Based on the micro-characterization of fatigue failure,the macro-phenomenon of fatigue tests,and the research approaches of fatigue reliability,the effect of cracks on the performance of piezoelectric sensors is analyzed,and the fatigue failure of piezoelectric transducers in the vibration energy harvesting is explored.The microscopic mechanism of the structural fatigue of the shape memory alloy and the influence of the functional fatigue on the service life of the actuator are described.The traditional fatigue research methods of sandwich structures are analyzed.Based on the existing research on the failure/fatigue problems of morphing structures,a research approach for the fatigue reliability of the corrugated structures is proposed.Finally,the follow-up research on the fatigue reliability of the above-mentioned smart material structures is prospected.
作者
王泓杰
王晨
沈星
Wang Hongjie;Wang Chen;Shen Xing(State Key Laboratory of Mechanics and Control of Mechanical Structures,Nanjing University of Aeronautics and Astronautics,Nanjing 210016,China)
出处
《航空科学技术》
2022年第3期52-64,共13页
Aeronautical Science & Technology
基金
国家自然科学基金(11872207)
国家自然科学基金(1211101092)
航空科学基金(20180952007)
机械结构力学及控制国家重点实验室(南京航空航天大学)自主研究课题(MCMS-I-0520G01)
江苏省优势学科建设工程资助项目。
关键词
智能材料结构
压电材料
形状记忆合金
变体结构
疲劳可靠性
smart material structure
piezoelectric material
shape memory alloy
flexible variant structure
fatigue reliability
