بررسی تجربی و عددی عملکرد ورق های فولادی ساده و تقویت شده با لچکی تحت ضربه سقوط آزاد

نوع مقاله : مقاله علمی پژوهشی

نویسندگان

1 دانشجوی کارشناسی ارشد، گروه عمران سازه، دانشکده فنی و مهندسی، دانشگاه لرستان، خرم آباد، ایران

2 دانشیار، گروه عمران سازه، دانشکده فنی و مهندسی، دانشگاه لرستان، خرم آباد، ایران

3 نویسنده مسئول، دانشیار، گروه مکانیک، دانشکده فنی و مهندسی، دانشگاه لرستان، خرم آباد، ایران

چکیده

در این تحقیق، به بررسی آزمایشگاهی و عددی ورق ­های فولادی تخت و تقویت شده بوسیله تقویت ­کننده های فولادی، تحت اثر ضربه ناشی از سقوط آزاد وزنه پرداخته شده است. ورق­ های فولادی مورد استفاده از جنس فولاد St12 می­ باشند. پارامترهای مورد ارزیابی این پژوهش شامل مقدار شتاب ضربه بر روی ورق، میزان تغییرشکل ماندگار و مقدار جذب انرژی برای ورق­ های تخت ساده و با تقویت­ کننده می­ باشد. برای مدل سازی عددی از نرم­ افزار المان محدود آباکوس استفاده شده است. نتایج نشان می ­دهد که استفاده از تقویت کننده موجب اندکی افزایش در شتاب وارده به ورق و کاهش قابل توجه تغییر شکل ماندگار آن می گردد.

کلیدواژه‌ها

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