کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
7171747 1463738 2016 12 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
The use of safety cuts in fatigue damaged fastener hole repair
ترجمه فارسی عنوان
استفاده از کاهش ایمنی در تعمیر سوراخ اتصال دهنده های آسیب دیده خستگی
کلمات کلیدی
خستگی، تعمیر سوراخ اتصال دهنده ها، احتمال تشخیص، رشد کراک، هواپیما،
موضوعات مرتبط
مهندسی و علوم پایه سایر رشته های مهندسی مهندسی مکانیک
چکیده انگلیسی
Safety cuts (or confidence cuts) are used in the repair of fatigue damaged fastener holes in aircraft structure to ensure that any residual crack is removed in the repair process. The necessity of using safety cuts was investigated by growing cracks in laboratory specimens and then “repairing” the specimens in the manner that would be done on in-service aircraft, both with and without safety cuts. The post-repair fatigue life for the safety-cut specimens showed a bimodal log normal distribution with the lower mode arising from machining flaws in the repair process. The results for the no safety-cut material, while having a similar mean life to the lower mode of the safety-cut coupons, showed nearly four times as much scatter in life. The results strongly suggest that residual cracks in no safety-cut coupons served as initiation sites for further crack growth. Consequently, despite the fact that safety cuts result in lower edge margins, they are a necessary part of the repair process.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: International Journal of Fatigue - Volume 91, Part 1, October 2016, Pages 242-247
نویسندگان
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