نوع مقاله : پژوهشی
نویسندگان
گروه مهندسی عمران، دانشکده فنی و مهندسی، دانشگاه هرمزگان، بندرعباس، ایران
چکیده
رفتار جفت‌شدگی الکترومکانیکی مواد پیزوالکتریک مرکب در صنایع مختلف نقش مهمی دارد. بررسی و مطالعه انتشار و پراکندگی امواج در چنین موادی برای درک خصوصیات و رفتار دینامیکی آنها ضروری است. در این پژوهش با استفاده از یک روش تحلیلی دقیق، میدان‌های الکترومکانیکی ناشی از پراکندگی امواج صفحه‌ای توسط یک ذره کروی پیزوالکتریک دارای همسانگرد کروی تعبیه شده در یک محیط پلیمری همسانگرد نامحدود مورد مطالعه قرار گرفته است. در فرمول ارائه شده هیچ محدودیتی در محدوده فرکانس موج ورودی وجود ندارد. ضرایب تمرکز تنش دینامیکی و ضریب تمرکز جابه جایی الکتریکی دینامیکی در سطح مشترک ذره پیزوالکتریک و محیط محاسبه شده‌اند. سپس، اثر فرکانس موج ورودی بر مقادیر حداکثر ضرایب تمرکز تنش دینامیکی و مقدار حداکثر ضریب تمرکز جابه جایی الکتریکی دینامیکی و همچنین مکان‌های وابسته به آنها برای امواج برشی و طولی مقایسه شده‌اند.
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