مهندسی مکانیک مدرس

مهندسی مکانیک مدرس

فرآیند ساخت و رفتار خمشی ساندویچ پنل با پوسته کامپوزیت‌های الیاف ممتد ترموپلاستیک و هسته‌ی چوبی

نوع مقاله : مقاله پژوهشی

نویسندگان
1 دانشکده مهندسی مکانیک ، دانشگاه تربیت مدرس، تهران، ایران
2 دانشکده مهندسی مکانیک، دانشگاه تربیت مدرس، تهران، ایران
10.48311/mme.2026.119262.82977
چکیده
در سال‌های اخیر، پیشرفت‌های چشم‌گیر در حوزه‌ی علم مواد و مهندسی، زمینه‌ساز توسعه و به‌کارگیری مواد نوین در ساختارهای مهندسی شده است. از میان این مواد، کامپوزیت‌ها به‌دلیل نسبت استحکام به‌وزن بالا، مقاومت مطلوب و امکان طراحی متنوع، توجه بسیاری از پژوهش‌گران را به‌خود جلب کرده‌اند. یکی از کاربردهای مهم این خانواده، تولید ساندویچ پنل‌ها با هسته‌های سبک و پوسته‌های مقاوم است که می‌توانند جایگزین مناسبی برای مصالح سنتی در صنایع مختلف به‌ویژه ساختمان و حمل‌ونقل باشند. در مقاله حاضر، ساخت و بررسی خواص مکانیکی ساندویچ پنل‌های کامپوزیتی مبتنی بر هسته‌ی زیستی چوب مورد مطالعه قرار گرفته است. فرآیند ساخت نمونه‌های ترموپلاستیک با روش پرس گرم و نمونه‌ی ترموست با روش پمپ خلا انجام شد. مواد مصرفی شامل پوسته‌های ترموپلاستیک پلی‌آمید 6 تقویت‌شده با الیاف شیشه و نیز رویه‌ی اپوکسی تقویت‌شده با الیاف شیشه در نمونه‌ی ترموست می‌باشند. جهت ارزیابی خواص مکانیکی، آزمون خمش سه نقطه‌ای انجام شد و نتایجی هم-چون تنش خمشی رویه، تنش خمشی پوسته و استحکام خمشی به‌دست آمد. در ادامه، شاخص‌های استحکام به‌وزن و جذب انرژی محاسبه و با یک-دیگر مقایسه گردید. هم‌چنین نتایج این پژوهش با مطالعات پیشین تطبیق داده شد تا نقاط قوت و بهبودهای احتمالی مشخص شود.
کلیدواژه‌ها
موضوعات

عنوان مقاله English

Manufacturing Process and Bending Behaviour of Sandwich Panels made by Unidirectional Thermoplastic Composite Skin with Wood Core

نویسندگان English

Mostafa Babaei 1
Mohammad Golzar 2
Hadi Ghorbani 1
1 Faculty of Mechanical Engineering, Tarbiat Modares University, Tehran, Iran
2 Faculty of Mechanical Engineering, Tarbiat Modares University, Tehran, Iran
چکیده English

In recent years, significant advances in materials science and engineering have enabled the development and application of novel materials in engineered structures. Among these materials, composites have attracted increasing attention due to their high strength-to-weight ratio, favorable mechanical properties, and design flexibility. One important application of these materials is the fabrication of sandwich panels with lightweight cores and stiff skins, which can serve as suitable alternatives to conventional materials in sectors such as construction and transportation. In the present study, the fabrication and mechanical characterization of bio-based wood-core composite sandwich panels were investigated. Thermoplastic samples were fabricated using the hot-press method, while thermoset samples were produced by the vacuum-assisted resin infusion process. The face sheets of the thermoplastic panels consisted of glass fiber–reinforced polyamide 6, whereas glass fiber–reinforced epoxy resin was used as the face sheet in thermoset samples. Mechanical performance was assessed by three-point bending tests, and parameters such as face bending stress, core bending stress, and overall flexural strength were obtained experimentally. Furthermore, indices of strength-to-weight ratio and energy absorption were calculated and compared across the different systems. Finally, the results were benchmarked against findings from previous studies to highlight performance improvements and potential advantages of the proposed configurations.

کلیدواژه‌ها English

Composite
Thermoplastic composite sandwich panel
, Wood core,
Three-point bending test
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