Experimental and Numerical Investigation of Lateral Loading of Thin –Walled Tube with Different Indenter
محورهای موضوعی : فصلنامه شبیه سازی و تحلیل تکنولوژی های نوین در مهندسی مکانیکسجاد دهقان پور 1 , حامد خلیلی 2 , کیوان حسینی صفری 3 , یونس محمدی 4
1 - گروه مکانیک، واحد تویسرکان، دانشگاه آزاد اسلامی، تویسرکان، ایران
2 - گروه مکانیک، واحد همدان، دانشگاه آزاد اسلامی، همدان، ایران
3 - دانشکده مهندسی صنایع و مکانیک، دانشگاه آزاد اسلامی، واحد قزوین، قزوین، ایران
4 - دانشکده مهندسی صنایع و مکانیک، دانشگاه آزاد اسلامی، واحد قزوین، قزوین، ایران
کلید واژه: energy absorption, ABAQUS, Quasi-Static, In-plane loading,
چکیده مقاله :
Impact is one of very important subjects which always have been considered in mechanical science. Nature of impact is such that which makes its control a hard task. Therefore it is required to present the transfer of impact to other vulnerable part of a structure, when it is necessary, one of the best method of absorbing energy of impact, is by using Thin-walled tubes these tubes collapses under impact and with absorption of energy, it prevents the damage to other parts. Purpose of recent study is to survey the deformation and energy absorption of tubes with different type of cross section (rectangular, circle, square, hexagonal) and with similar volumes, height, mean cross section, and material under three different loading with different indenter. Lateral loading of tubes are quasi-static type and beside as numerical analysis, also experimental experiences has been performed to evaluate the accuracy of the results. Results from the surveys is indicates that in a same conditions which mentioned above, samples with square cross section, absorb more energy compare to another cross section.
ضربه یکی از موارد بسیار مهمی است که همواره در علم مکانیک مطرح بوده است. ماهیت ضربه به نحوی است که کنترل آن را مشکل میسازد، در نتیجه لازم است که بتوان در مواقع نیاز از انتقال ضربه به قسمت های آسیبپذیر یک سازه جلوگیری کرد. یکی از بهترین روشهای جذب انرژی ضربه، استفاده از لوله های جدار نازک فلزی با چگالی کم است. این لوله ها تحت ضربه دچار فرو ریزش شده و با جذب انرژی، مانع از آسیب رسیدن به قسمتهای دیگر سازه میشوند. هدف از این تحقیق بررسی تغییر شکل و جذب انرژی لولههای جدار نازک با شکل مقاطع دایره، شش ضلعی، پنج ضلعی، مربع و مستطیل و با حجم، ارتفاع، سطح مقطع متوسط، ضخامت و جنس یکسان، زیر سه حالت بارگذاری میباشد. بارگذاری ها به صورت شبه استاتیکی بوده و از نتایج آزمایشگاهی به منظور بررسی دقت و صحت نتایج عددی استفاده شده است. نتایج حاصل از بررسیها نشان می دهد در حالت اول بارگذاری، بیشترین جذب انرژی توسط مقطع مربع و در حالت دوم و سوم بارگذاری مقطع مستطیل به صورت ایستاده بیشترین جذب انرژی را داشتهاند.
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