مدل‌سازی عددی پانل ساندویچی با رویه‌های مختلف و گرادیان هسته تحت ضربه انفجاری

نوع مقاله : مقاله مستقل

نویسنده

دانشجو دکتری مهندسی مکانیک گرایش طراحی و کاربردی، دانشگاه بوعلی‌سینا، همدان، ایران

10.22044/jsfm.2024.14207.3836

چکیده

پانل‌های ساندویچی با هسته فوم آلومینیوم جاذب‌های انرژی مناسب برای کاربردهای حفاظت در برابر ضربه نظیر پانل‌های ساختمانی سبک، مواد بسته‌بندی و تجهیزات جاذب انرژی هستند. در این پژوهش، مدهای واماندگی و تغییرشکل پانل‌های ساندویچی در برابر ضربه‌های انفجاری به‌صورت عددی بررسی و با نتایج تجربی مقایسه شده است. بارگذاری انفجاری روی پانل ساندویچی با هسته فوم یکنواخت و با مواد طبقه‌بندی تابعی، و رویه‌های با جنس آلومینیوم 5182، فولاد زنگ نزن 304 و CFRP صورت گرفته است. مدهای تغییرشکل رویه بالایی، هسته فومی و رویه پایینی با یک روش معین تحلیل شده است. در این پژوهش نشان داده شده است که مدهای تغییرشکل به شدت ضربه، جنس رویه‌ها و گرادیان هسته ساندویچ فوم وابسته است. براساس نتایج پژوهش، تغییر شکل عرضی رویه پایینی به‌طور خطی با شدت ضربه افزایش می‌یابد. در یک شدت ضربه معین (جرم ماده منفجره 30 گرم) و جنس فلزی یکسان رویه پایینی، مقاومت در برابر انفجار نمونه پانل ساندویچی با رویه بالایی CFRP، 19 درصد بالاتر از نمونه ساندویچی با رویه بالایی فلزی می‌باشد. مقاومت در برابر انفجار نمونه پانل ساندویچی با جنس رویه بالایی آلومینیوم و جنس رویه پایینی فولادی نسبت به نمونه پانل ساندویچی با جنس رویه بالایی فولادی و جنس رویه پایینی آلومینیوم 6 درصد بالاتر می‌باشد.

کلیدواژه‌ها

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