مروری بر تحلیل خستگی میل‌لنگ

نوع مقاله: مقاله علمی ترویجی

نویسندگان

1 دانشجوی کارشناسی‌ ارشد، دانشگاه صنعتی مالک ‌اشتر، شیراز

2 علی عبداللهی‌فر، استادیار، دانشگاه صنعتی مالک ‌اشتر، شیراز

3 سید مسعود هاشمی، استادیار، دانشگاه صنعتی مالک ‌اشتر، شیراز

چکیده

میل‌لنگ از جمله قطعات مهم و پیچیده در انواع موتور است. اهمیت تجزیه و تحلیل خستگی و تخمین عمر آن نیز بر کسی پوشیده نیست. برای طراحی میل‌لنگ چالش‌های بسیاری از جمله بار مفید خودرو، وزن کمتر درخواستی، بازده و عمر دوام بیشتر مورد نظر است. میل‌لنگ طی عمر کارکرد خود متحمل بارهای خمشی و پیچشی متناوب می‌شود و شکست در آن سب ایجاد خسارت جدی به موتور می‌گردد، بنابراین در زمان طراحی باید استحکام خستگی آن لحاظ شود. در این مقاله، مروری جامع بر پژوهش‌های متنوع انجام‌شده در حوزه‌های مکانیک شکست، تحلیل خستگی و تخمین عمر میل‌لنگ مطرح شده است. برای این منظور، نخست روش‌های آزمایشگاهی، تحلیلی و عددی محاسبة شاخص‌های خستگی و تخمین عمر میل‌لنگ بیان می‌شود، سپس روش‌های تشخیص و ارزیابی مکان و اندازة ترک ارائه می‌گردد. در نهایت به بررسی روش‌های عملی افزایش عملکرد خستگی و بهینه‌سازی این قطعه پرداخته می‌شود.

کلیدواژه‌ها


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