مهندسی مکانیک مدرس

مهندسی مکانیک مدرس

مدل‌سازی المان محدود تخریب در مخزن تحت فشار کامپوزیتی نوع IV با استفاده از افزونه WCM در نرم‌افزار آباکوس

نویسندگان
محمد حیدری رارانی
محسن احمدی جبلی
دانشگاه صنعتی اصفهان
چکیده
امروزه هیدروژن به ‌عنوان یک منبع انرژی سازگار با محیط زیست مورد توجه صنعت حمل‌ و ‌نقل قرار گرفته است. استفاده از مخازن تحت فشار کامپوزیتی نوع IV به دلیل نسبت استحکام به وزن مناسب آن‌ها، راه‌حلی مطمئن برای ذخیره گاز هیدروژن متراکم به شمار می‌آید. مخازن تحت فشار کامپوزیتی نوع IV از سه بخش اصلی، لاینر پلیمری، فلنج فلزی و پوسته کامپوزیتی الیاف کربن/اپوکسی تشکیل شده‌اند. در ناحیه عدسی‌های این مخازن به ‌دلیل کاهش شعاع و تجمع رزین، ضخامت لایه‌های کامپوزیتی و زاویه الیاف افزایش می‌یابد و این امر مدل‌سازی این نواحی را در این مخازن به جدی‌ترین چالش تبدیل کرده است. افزونه WCM به منظور شبیه‌سازی المان محدود متقارن محوری یا سه‌بعدی مخازن تحت فشار کامپوزیتی نوع III و IV، برای نرم‌افزار آباکوس ارائه شده است. در این افزونه علاوه‌ بر کمیت‌هایی چون ضخامت لایه‌ها و زاویه الیاف می‌توان کمیت‌های ساختی چون پهنای باند، زاویه انتقال و بخش پایانی را نیز تعیین کرد تا مدل‌سازی دقیق‌تری حاصل شود. در این پژوهش، مخزن تحت فشار کامپوزیتی نوع IV با حجم داخلی دو لیتر، توسط افزونه WCM در نرم‌افزار آباکوس مدل شده است. مقایسه نتایج عددی حاصل از این مدل‌سازی با نتایج تجربی و شبیه‌سازی‌های موجود در مقالات، دقت قابل قبول این مدل‌سازی را نشان می‌دهد. همچنین در این پژوهش، پس از استخراج تنش‌های راستای اصلی ماده و کدنویسی روابط حاکم بر معیارهای شکست مواد کامپوزیتی چون تسای-هیل، تسای- وو و هشین، فشار تخریب مخزن پیش‌بینی شده است که در پژوهش‌های دیگر به آن پرداخته نشده است.
کلیدواژه‌ها
مخزن تحت فشار
پیچش الیاف
افزونه WCM
فشار انفجار

موضوعات

عنوان مقاله English

Finite element modeling of failure in IV type composite pressure vessel using WCM plug-in in ABAQUS software

نویسندگان English

Mohammad Heidari-Rarani
Mohsen Ahmadi-Jebeli
Mechanical Engineering Department, Faculty of Engineering, University of Isfahan
چکیده English

Hydrogen has become an attractive source of energy for transportation industry, which is adaptable to the environment. Using composite pressure vessel type IV for storing compressed hydrogen gas seems to be a safety solution because of their ratio of strength to weight. Type IV composite pressure vessels consist of three main parts of polymeric liner, metallic boss and carbon fiber/epoxy composite shell. In the dome zones of these vessels, the thickness of composite layers and the fiber angle would increase because of accumulation of resin and reduction in radius. This issue is caused the modeling of these vessels to be a serious challenge. The WCM plug-in is presented for simulation of axisymmetric or three-dimensional composite pressure vessels type III and IV in ABAQUS software. In addition to the parameters like layer thicknesses and fiber angles, manufacturing parameters such as bandwidth, transition angle and end fraction could be also defined in this plug-in in order to achieve more accurate results. In this study, a type IV high pressure composite vessel with inner volume of two liters is modeled using the WCM plug-in in ABAQUS software. Numerical results are assessed by the available experimental results in the literature. Moreover, failure pressure of this vessel has been estimated by calculating the on-axis stresses and using failure criteria such as Tsai-Hill, Tsai-Wu and Hashin which is not done in other investigations.

کلیدواژه‌ها English

pressure vessel
Filament winding
WCM plug-in
Burst pressure
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مهندسی مکانیک مدرس
دوره 18، شماره 4
مرداد 1397
صفحه 191-200