Damage Identification Using Acoustic Emission Data Obtained from Large Composite Structures

被引：0
|
作者：
Awerbuch, Jonathan [1 ]
Ozevin, Didem [2 ]
Khanolkar, Amey [3 ]
Tan, Tein-Min [1 ]
机构：
[1] Drexel Univ, Dept Mech Engn, Sacramento, CA 95820 USA
[2] Univ Illinois, Dept Civil & Mat Engn, Chicago, IL 60607 USA
[3] Univ Washington, Mech Engn, Seattle, WA 98195 USA
来源：
STRUCTURAL HEALTH MONITORING 2015: SYSTEM RELIABILITY FOR VERIFICATION AND IMPLEMENTATION, VOLS. 1 AND 2 | 2015年
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D O I：
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中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Acoustic emission was implemented to monitor damage initiation and its progression in a full-scale Pultruded Rod Stitched Efficient Unitized Structure (PRSEUS) carbon/epoxy fuselage panel subjected to combined loading of internal pressure and axial load. Prior to panel fracture, emission was generated at a very high rate, with a significant amount of emission apparently generated by fretting among the nearly infinite newly formed fracture surfaces. The separation of burst type waveforms (i.e., which are caused by actual new damage) and emission caused from extraneous sources is demonstrated. The effect of high rate of emission on the corresponding AE signal features is demonstrated. It is shown that the high rate of failure in composites is an added difficulty for damage source identification, which the current AE methodology needs to address.
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页码：1524 / 1531
页数：8
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