پایان نامه مطالعه ی تاثیرتشعشع حرارتی بر روی رفتار مکانیکی میکروتیر های FGM

فهرست:

فهرست شکلها  ...........................................................................................................................................

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فهرست جداول  ..........................................................................................................................................

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مقدمه  .........................................................................................................................................................

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فصل اول: مفاهیم و کلیات........................................................................................................................

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1-1 سیستمهای میکروالکترومکانیکی  ..........................................................................................

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1-1-1 مقدمه  ...............................................................................................................................

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1-1-2 طبقه بندی سیستم های میکروالکترومکانیکی  .......................................................

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1-1-3 انواع عملگرهای میکروالکترومکانیکی  ........................................................................

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1-1-3-1 تحریک مغناطیسی  ............................................................................................

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1-1-3-2 تحریک توسط مواد پیزوالکتریک  ....................................................................

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1-1-3-3 تحریک دمایی  .....................................................................................................

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1-1-3-4 تحریک توسط آلیاژهای حافظه دار  ................................................................

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1-1-3-5 تحریک الکترواستاتیک  .....................................................................................

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1-1-4 میکرو عملگرهای الکترواستاتیک  ...............................................................................

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1-1-5 پدیده های معمول در سیستم های میکروالکترومکانیکی  ....................................

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1-1-5-1 میرایی لایه فشرده سیال  ..................................................................................

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1-1-5-2 میرایی ترموالاستیک  .........................................................................................

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1-1-5-3 ناپایداری کششی  ................................................................................................

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1-2 مواد متغییر تابعی  .....................................................................................................................

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1-2-1 مقدمه  ...............................................................................................................................

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1-2-2 تاریخچه مواد متغییر تابعی  .........................................................................................

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1-2-3 کاربرد مواد متغییر تابعی  .............................................................................................

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1-2-4 مدل سازی مواد متغییر تابعی  ....................................................................................

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1-2-4-1 مدل ردی  .............................................................................................................

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1-2-4-2 مدل نمایی  ...........................................................................................................

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1-2-4-3 مدل توانی  ............................................................................................................

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1-3 تئوری تنش کوپل یا گرادیان کرنش الاستیسیته  ..............................................................

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1-3-1 مقدمه  ...............................................................................................................................

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1-3-2 تاریخچه ی تئوری تنش کوپل  ...................................................................................

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فصل دوم: مروری بر کارهای انجام شده  .............................................................................................

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2-1 مطالعه ی اثر تغییرات دمائی در سیستمهای میکروالکترومکانیکی  ...............................

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2-2 مطالعه ی اثر نیروهای الکترواستاتیکی در سیستمهای میکروالکترومکانیکی  ..............

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2-3 مطالعه ی تئوری تنش کوپل در سیستمهای میکروالکترومکانیکی  ...............................

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2-4 مطالعه ی رفتار تیرها و ساختارهای FGM  .........................................................................

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2-5 هدف و ضرورت انجام تحقیق  .................................................................................................

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فصل سوم: ارائه ی مدل مورد مطالعه و استخراج معادلات حاکم  .....................................................

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3-1 معرفی سیستم مورد مطالعه  ...................................................................................................

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3-2 مدلسازی ریاضی و ریاضی و استخراج معادلات برای دستیابی به خیز تیر  ..................

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3-2-1 معادله ی هدایت گرما  ..................................................................................................

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3-2-2 فرمولاسیون معادلات میکروتیر FGM بر پایه ی MCST  ....................................

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فصل چهارم: روشهای حل معادلات تحت بارگذاریهای مختلف  .........................................................

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4-1 معادله ی استاتیکی  ..................................................................................................................

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4-1-1 اثر ولتاژ  ............................................................................................................................

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4-1-2 اثر تغییر دما  ...................................................................................................................

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4-1-3 اثر همزمان تغییر دما و اعمال تدریجی نیروی الکترواستاتیکی  ..........................

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4-2 معادله ی دینامیکی  ..................................................................................................................

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فصل پنجم: نتایج عددی  ............................................................................................................................

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5-1 مقدمه  ..........................................................................................................................................

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5-2 اثر اعمال تدریجی نیروی الکترواستاتیکی (در غیاب تغییرات دما)  ................................

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5-3 اثر اعمال تدریجی دما (در غیاب  نیروی الکتروستاتیکی)  ...............................................

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5-4 اثر همزمان تغییرات دمائی و اعمال تدریجی نیروی الکترواستاتیکی  ............................

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5-5 اثر اعمال ولتاژ DC پله روی میکروتیر FGM  ....................................................................

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5-6 اثر اعمال ولتاژ DC پله روی میکروتیر FGM  خمیده ناشی از تغییرات دمایی  .........

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فصل ششم: جمع بندی  ..............................................................................................................................

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6-1 نتیجه گیری  ...............................................................................................................................

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6-1 پیشنهادات برای کارهای آینده  ..............................................................................................

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مراجع  ..........................................................................................................................................................

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Abstract  .................................................................................................................................................

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