کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
5015354 | 1463735 | 2016 | 24 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Experimental study of crack growth under non-proportional loading along with first modeling attempts
ترجمه فارسی عنوان
بررسی تجربی رشد ترک در بارگیری غیر متناسب با اولین تلاش های مدل سازی
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کلمات کلیدی
خستگی چند ضلعی حالت مخلوط، رشد ترک خستگی،
موضوعات مرتبط
مهندسی و علوم پایه
سایر رشته های مهندسی
مهندسی مکانیک
چکیده انگلیسی
For various configurations examined in a series of fatigue experiments on thin-walled tubes under tension and torsion, the experimental results (crack path and crack growth life) are measured. Additionally, crack opening and closure was observed applying surface deformation field measurements using digital image correlation. Due to the high applied load amplitudes considerable cyclic plastic deformation occurred especially ahead of the crack front. The material's cyclic plastic behavior was measured and a convenient plasticity model was used for its description. In the finite element analyses, actual geometries of cracked structures have been modeled. The non-linear nature of the cyclic deformation has been taken into account by applying the cyclic plasticity model. Plasticity-induced crack closure is captured by a contact formulation, actually however only for simple tension-compression loading. For the latter case, closure-free cyclic J-integrals were calculated. The crack growth rates measured in the experiments correlate well with the numerically determined cyclic J-integrals for the simple mode I case.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: International Journal of Fatigue - Volume 92, Part 2, November 2016, Pages 426-433
Journal: International Journal of Fatigue - Volume 92, Part 2, November 2016, Pages 426-433
نویسندگان
Yigiter Hos, Michael Vormwald,