حل عددی خمش پوسته کامپوزیتی انعطاف ­پذیر مورد استفاده در بال مورفینگ به روش بدون شبکه ­ی درونیابی نقاط شعاعی و مقایسه با نتایج تجربی

شکیباسرشت, مرتضی; ذبیح پور, محمود; ملک زاده, کرامت; اسکندری جم, جعفر

doi:10.48311/mme.2025.96923.0

حل عددی خمش پوسته کامپوزیتی انعطاف پذیر مورد استفاده در بال مورفینگ به روش بدون شبکه ی درونیابی نقاط شعاعی و مقایسه با نتایج تجربی

نوع مقاله : مقاله پژوهشی

نویسندگان

مرتضی شکیباسرشت

محمود ذبیح پور

کرامت ملک زاده

جعفر اسکندری جم

دانشگاه صنعتی مالک اشتر، مجتمع دانشگاهی هوافضا، تهران، ایران

10.48311/mme.2025.96923.0

چکیده

در این مقاله خمش یک پوسته کامپوزتی انعطاف‌پذیر(ماتریس الاستومر) مورد استفاده در پوسته بال مورفینگ به روش عددی مورد آنالیز قرار گرفته است و نتایج حاصل از حل عددی با یک مقاله معتبر که بصورت تجربی برروی خمش این پوسته تحقیقی انجام شده، مقایسه شده‌است. در ابتدا معادلات حاکم با استفاده از روش حداقل انرژی پتانسیل کل و معادلات اویلر-لاگرانژ استخراج شده است که شامل معادلات دیفرانسیل بشدت غیرخطی می‌باشند، جهت گسسته سازی این معادلات از روش بدون شبکه درونیابی نقاط شعاعی به فرم قوی استفاده شده است و همچنین از روش نیوتن-رافسون جهت حل عددی معادلات غیر خطی بهره برده‌شده است. شرایط مرزی بصورت گیردار در چهار طرف درنظر گرفته شده است. در این تحلیل تاثیر نیروهای پیش کشش و همچنین بارهای خارج ازصفحه در میزان جابجایی حداکثر پوسته کامپوزیتی بررسی شده است. مقایسه نتایج حل به روش عددی بدون شبکه با نتایج تجربی نشان داد که حل به روش مذکور از دقت خوبی برخوردار است واختلاف اندکی با نتایج تجربی دارد.

کلیدواژه‌ها

روش بدون شبکه

فرم قوی

تابع شکل

ناحیه تاثیر

موضوعات

سازه های هوا فضا

عنوان مقاله English

Numerical Simulation of Flexible Composite Skin Bending in Morphing Wings Using the Radial Point Interpolation Mesh free Method: Comparison with Experimental Results

نویسندگان English

morteza Shakibaseresht

Mahmood Zabihpoor

keramat malekzadeh

jafar eskandari jam

Aerospace Engineering Department, Malek Ashtar University of Technology, Tehran, Iran

چکیده English

In this study, the bending of a flexible composite shell (with an elastomeric matrix) used in a morphing wing skin is analyzed numerically, and the numerical results are compared with those of a reputable experimental study conducted on the bending behavior of this shell. First, the governing equations are derived using the total potential energy minimization method and the Euler–Lagrange equations, resulting in highly nonlinear differential equations. To discretize these equations, the strong-form meshfree Radial Point Interpolation Method(RPIM) is employed, and the Newton–Raphson method is used to obtain the numerical solution of the nonlinear equations. The boundary conditions are considered clamped on all four edges. In this analysis, the effects of pretension forces as well as out-of-plane loads on the maximum displacement of the composite shell are investigated. Comparison of the meshfree numerical results with the experimental data shows that the proposed numerical solution has good accuracy and exhibits only a small deviation from the experimental results

کلیدواژه‌ها English

Mesh Free Method

Strong Form

Shape Function

Influence Domain

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