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Journal of Aerospace Science and Technology، جلد ۱۱، شماره ۱، صفحات ۹-۱۳
عنوان فارسی Dynamic stiffness matrix for analysis of modal properties the damaged composite wing
چکیده فارسی مقاله In this paper, damage in composite wings is introduced, firstly, then using Euler- Bernoulli equations with including flexural and torsional coupling, governing equations on cantilevered composite wing is derived. By applying separation method damaged beam is converted to two interconnected intact beams and using boundary conditions and continues conditions in damage location, the dynamic stiffness matrix is composed and modal analysis of damaged wing is done. Composite type is fiber-reinforced and damage type is edge crack with various locations and depths. Also effects crack depths and locations on modal properties in various fiber angle are examined. Results showed that existence a crack even with small depth in root of large span wing can reduce natural frequencies, seriously.
کلیدواژه‌های فارسی مقاله
عنوان انگلیسی Dynamic stiffness matrix for analysis of modal properties the damaged composite wing
چکیده انگلیسی مقاله In this paper, damage in composite wings is introduced, firstly, then using Euler- Bernoulli equations with including flexural and torsional coupling, governing equations on cantilevered composite wing is derived. By applying separation method damaged beam is converted to two interconnected intact beams and using boundary conditions and continues conditions in damage location, the dynamic stiffness matrix is composed and modal analysis of damaged wing is done. Composite type is fiber-reinforced and damage type is edge crack with various locations and depths. Also effects crack depths and locations on modal properties in various fiber angle are examined. Results showed that existence a crack even with small depth in root of large span wing can reduce natural frequencies, seriously.
کلیدواژه‌های انگلیسی مقاله “Cracked wing”,“Dynamic stiffness matrix”,“Modal properties”,“interconnected beam”
نویسندگان مقاله Shahrokh Shams |
Faculty of New Sciences and Technologies

َA.R. Torabi |
Fracture Research Laboratory, Faculty of New Science and Technologies, University of Tehran

Mahdi Fathi Narab |
Department of Aerospace Engineering, Faculty of New Sciences and Technologies, University of Tehran

نشانی اینترنتی https://jast.ias.ir/article_145165_f4505c2726af310a3420cae7cd32946c.pdf
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