نویسندگان

دانشکده مهندسی مکانیک، دانشگاه تبریز

چکیده

در مقاله حاضر به بررسی عددی تاثیر ایجاد فیلت بر روی محور در مقاومت خستگی سایشی آن پرداخته شده و نتایج حاصل از مدلسازی عددی با داده های آزمایشگاهی موجود در ادبیات فن مقایسه می گردد. بمنظور بررسی مقاومت خستگی سایشی محور از معیارهای خستگی چند محوره و پارامتر دوم خستگی سایشی استفاده شده است. نتایج حاصل نشان می دهند که ایجاد فیلت بر روی محور باعث بهبود مقاومت خستگی می گردد که میزان این بهبود به شعاع فیلت و نسبت قطر محور بستگی دارد. علاوه بر این محل شکست محور نیز در اثر تغییر ابعاد فیلت و محور تغییر می کند. معیارهای خستگی چند محوره تا حدود زیادی در تخمین مقاومت خستگی محور موفق عمل می نمایند. با این حال نتایج حاصل از بررسی پارامتر دوم خستگی سایشی تطابق بهتری با نتایج حاصل از تستهای تجربی داشته و میتواند به عنوان معیاری مناسب جهت بررسی مقاومت خستگی سایشی محور مورد استفاده قرارگیرد.

کلیدواژه‌ها

عنوان مقاله [English]

Studying the Effect of Fillet on Fretting Fatigue Strength in the Press-Fitted Axle Assembly using Different Multiaxial Fatigue Criteria and Fretting Fatigue Damage Darameter

نویسندگان [English]

  • M. Zehsaz
  • P. Shahriary

چکیده [English]

The present paper studies the effect of creating a fillet on fretting fatigue strength of an axle, using different multiaxial fatigue criteria and fretting fatigue damage parameter. Finite element method is applied to obtain stress and strain in the axle and the results obtained from modeling are compared with the experimental test data available in literature. The results show that fretting fatigue strength of the axle and fracture area depends on the ratio of  diameter to fillet radius. Multiaxial fatigue criteria is almost capable of estimating the fatigue strength of the axle . However; the results obtained from investigating fretting fatigue damage parameter are almost in accordance with the results of experimental data and consequently fretting fatigue damage parameter can be appropriately used as a criterion for estimating fretting fatigue strength of the axles.

کلیدواژه‌ها [English]

  • Fretting fatigue
  • axle and hub
  • fillet axle
  • multiaxial fatigue
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