کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
800776 1467667 2015 7 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Parametric study of an elliptical fuselage made of a sandwich composite structure
ترجمه فارسی عنوان
مطالعه پارامتری از یک بدنه بیضوی ساخته شده از یک ساختار کامپوزیتی ساندویچ
کلمات کلیدی
بدنه بیضوی، بدنه غیر دایره ای مخازن تحت فشار، ساختار ساندویچ
موضوعات مرتبط
مهندسی و علوم پایه سایر رشته های مهندسی مهندسی مکانیک
چکیده انگلیسی


• A pressurised elliptical fuselage is sized and compared with a circular fuselage.
• Three constructions cases are analysed: monolithic, symmetric sandwich, unsymmetric sandwich.
• Facesheet thicknesses above and below the sandwich core are minimised.
• Elliptical cross-section incurs a significant penalty in terms of necessary facesheet thickness.
• Penalty is minimised by keeping eccentricity low, loading intensity low and sandwich core thick.

We size the shell thickness of a pressurised elliptical fuselage and analyse the weight gains or savings compared to a circular fuselage. Three fuselage construction cases are analysed: a monolithic construction, a symmetric sandwich with two facesheets of equal thicknesses separated by a lightweight core, and an unsymmetric sandwich with two facesheets of different thicknesses. We develop a proper dimensionless analysis comparing the proposed elliptical fuselage with a circular one for two different scenarios: equivalent cross-section areas and enclosing a similar rectangular box. We apply a semi-analytical thin shell theory to compute the loading due to pressurisation around the circumference of the fuselage cross-section. We select the facesheet thicknesses above and below the sandwich core at every location to minimise weight. The goal is to compute the structural weight gain or penalty that is incurred by replacing a circular fuselage with an elliptical one to resist internal pressurisation in function of the scenario, eccentricity, fuselage diameter, and sandwich core thickness. We find that an elliptical cross-section incurs a significant penalty in terms of necessary facesheet thickness even with an optimised unsymmetric sandwich construction. This penalty can be minimised by keeping the eccentricity low, the loading intensity low and the core thick.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Mechanics Research Communications - Volume 69, October 2015, Pages 129–135
نویسندگان
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