Experimental Multiphysical Characterization of an SMA Driven, Camber Morphing Owl Wing Section 机翻标题: 暂无翻译,请尝试点击翻译按钮。

会议集名/来源
Nondestructive Characterization and Monitoring of Advanced Materials, Aerospace, Civil Infrastructure, and Transportation XII: SPIE Smart Structures and Materials + Nondestructive Evaluation And Health Monitoring Conference, 5-8 March 2018, Denver, Colorado, United States
出版年
2018
页码
105990Z.1-105990Z.9
会议地点
Denver
作者单位
Texas A&M University, 400 Bizzell St, College Station, TX, United StatesTexas A&M University, 400 Bizzell St, College Station, TX, United StatesTexas A&M University, 400 Bizzell St, College Station, TX, United States
作者
Hannah R. Stroud;Pedro B. C. Leal;Darren J. Hartl
摘要
In the context of aerospace engineering, morphing structures are useful in their ability to change the outer mold line (OML) while improving or maintaining certain aerodynamic performance metrics. Skin-based morphing is of particular interest in that it minimizes installation volume. Shape memory alloys (SMAs) have a high force to volume ratio that makes them a suitable choice for skin-based morphing. Because the thermomechanical properties of SMAs are coupled, strain can be generated via a temperature variation; this phenomenon is used as the actuation method. Therefore, it is necessary to determine the interaction of the system not only with aerodynamic loads, but with thermal loads as well. This paper describes the wind tunnel testing and in situ thermomechanical analysis of an SMA actuated, avian inspired morphing wing. The morphing wing is embedded with two SMA composite actuators and consists of a foam core enveloped in a fiberglass-epoxy composite. As the SMA wire is heated, the actuator contracts, morphing the wing from the original owl OML to a highly cambered, high lift OML. Configuration characteristics are analyzed in situ using simultaneous three dimensional digital image correlation (DIC) and infrared thermography, thereby coupling strain and thermal measurements. This method of testing allows for the nonintrusive, multiphysical data acquisition of each actuator separately and the system as a whole.
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关键词
Avian-inspired;Morphing;Shape Memory Alloys;Digital Image Correlation;Infrared Thermogra-phy
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