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کمانش پیش رونده دینامیکی در لولههای مخروطی جدار نازک شیاردار حاوی فوم تحت بار ضربهای | ||
| نشریه مهندسی مکانیک امیرکبیر | ||
| دوره 57، شماره 4، تیر 1404، صفحه 497-520 اصل مقاله (1.6 M) | ||
| نوع مقاله: مقاله پژوهشی | ||
| شناسه دیجیتال (DOI): 10.22060/mej.2025.24158.7845 | ||
| نویسندگان | ||
| سعید فعلی* 1؛ عرفان مخصوص1؛ سید سجاد جعفری2 | ||
| 1گروه مهندسی مکانیک، دانشکده فنی و مهندسی، دانشگاه رازی، کرمانشاه، ایران | ||
| 2گروه مهندسی مکانیک، دانشگاه صنعتی همدان، همدان، ایران | ||
| چکیده | ||
| جاذبهای انرژی به دلیل کاربرد گستره در صنعت، امروزه از اهمیت ویژهای برخوردارند و بهعنوان عناصر کلیدی در ارتقای ایمنی و کاهش خسارات ناشی از ضربه شناخته میشوند. این جاذبها با تغییر شکل پلاستیک و چروکیدگی، ضربه ناشی از بار محوری را جذب میکنند. در این مقاله، بارگذاری ضربهای در جاذبهای مخروطی شیاردار پرشده با فوم به روش تحلیلی و شبیهسازی عددی موردبررسی قرارگرفته است. ابتدا یک مدل تحلیلی جدید برای محاسبه نیروی متوسط فروریزش و میزان جذب انرژی در جاذبهای حاوی فوم ارائهشده است. این مدل بر اساس جذب انرژی الاستیک و پلاستیک که شامل خمش مفاصل و تغییر شکل بین مفاصل میباشد، ارائه شده است. شبیهسازی عددی فروریزش پیشرونده دینامیکی در این جاذبها با استفاده از نرمافزار آباکوس انجامشده و نتایج با مدل تحلیلی و نتایج تجربی مقایسه شده است. هدف از این مقایسه، ارزیابی دقت مدل تحلیلی در پیشبینی رفتار واقعی جاذبها بوده است. در نهایت، تأثیر پارامترهایی همچون زاویه مخروط، تعداد شیار و چگالی فوم جاذب بر میزان جذب انرژی بررسیشده است. نتایج این بررسی میتواند راهنمای مفیدی در طراحی بهینه این نوع جاذبهای انرژی باشد. | ||
| کلیدواژهها | ||
| جاذب انرژی؛ مخروط شیاردار؛ فوم؛ مدل تحلیلی؛ شبیهسازی | ||
| عنوان مقاله [English] | ||
| Dynamic Progressive Buckling of Thin Wall Foam-Filled Conical Tubes Under Impact Loading | ||
| نویسندگان [English] | ||
| Saeed Feli1؛ Erfan Makhsoos1؛ Seyed Sajad Jfari2 | ||
| 1Department of Mechanical Engineering, Razi University, Kermanshah, Iran | ||
| 2Department of Mechanical Engineering, Hamedan University of Technology, Hamedan, Iran | ||
| چکیده [English] | ||
| Energy absorbers are of particular importance today due to their extensive application in industry, and they are recognized as key elements in enhancing safety and reducing damage resulting from impact. These absorbers dissipate the impact caused by axial loads through plastic deformation and buckling. In this paper, the impact loading on foam-filled grooved conical absorbers has been investigated using analytical and numerical simulation methods. Initially, a novel analytical model for calculating the mean crushing force and the amount of energy absorption in absorbers is presented. This model is based on elastic and plastic energy absorption, which includes hinge bending and deformation between hinges. Numerical simulation of progressive dynamic crushing in these absorbers has been performed using Abaqus, and the results have been compared with the analytical model and experimental results. The aim of this comparison was to evaluate the accuracy of the analytical model in predicting the actual behavior of the absorbers. Finally, the effect of various parameters such as cone angle, number of grooves, and foam density of the absorber on the amount of energy absorption has been investigated. The results of this investigation can be a useful guide in the optimal design of this type of energy absorbers. | ||
| کلیدواژهها [English] | ||
| Energy Absorbers, Thin-Walled Grooved Conical Tubes, Foam, Analytical Model, Simulation | ||
| مراجع | ||
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