کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
8960238 | 1646396 | 2018 | 12 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Progression of plastic strain on heavy-haul railway rail under random pure rolling and its influence on crack initiation
ترجمه فارسی عنوان
پیشرفت فشار پلاستیکی در راه آهن راه آهن سنگین به علت تصادم خالص تصادفی و تاثیر آن در شروع ترک
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کلمات کلیدی
تماس خستگی نورد، راه آهن راه آهن، انباشت پلاستیک، روش عنصر محدود تئوری هرتس،
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی کامپیوتر
نرم افزار
چکیده انگلیسی
The present work evaluates the plastic strain accumulation on railway rails for heavy-haul transportation and the effect of them on the life cycle and the stress-strain responses considering random loading passes of normal loads on the top of rail for wheel-rail pure rolling conditions. The normal pressure distribution on the contact region was estimated by the Hertz theory and applied on the surface of the rail in a tridimensional elastoplastic finite element model. Multiaxial Dang Van criterion was applied to estimate the life to crack nucleation. The results show that the level of plastic accumulation presents distinct magnitudes depending on the position analyzed, reaching similar plastic accumulation in analogous positions on the subsurface after several passes, for two different starting positions. That result is fundamental for life analyses, since indicates that, no matter the starting point, the computed life cycles always stabilizes after a few number of cycles. From that, the fatigue life to shelling can be estimated using high cycle models.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Advances in Engineering Software - Volume 124, October 2018, Pages 10-21
Journal: Advances in Engineering Software - Volume 124, October 2018, Pages 10-21
نویسندگان
Thairon Reis, Eduardo de Abreu Lima, Felipe Bertelli, Auteliano Antunes dos Santos Junior,