تسکین دهنده تنش در فرسودگی سایشی
ترجمه نشده

تسکین دهنده تنش در فرسودگی سایشی

عنوان فارسی مقاله: حفره های داخلی به عنوان تسکین دهنده تنش در فرسودگی سایشی
عنوان انگلیسی مقاله: Internal voids as a stress reliever and palliative in fretting fatigue
مجله/کنفرانس: پروسیدیای مهندسی – Procedia Engineering
رشته های تحصیلی مرتبط: مهندسی مکانیک
گرایش های تحصیلی مرتبط: ساخت و تولید
کلمات کلیدی فارسی: سایش، حفره ها، مدل عددی، تماس استوانه ای، تسکین دهنده
کلمات کلیدی انگلیسی: Fretting; voids; numerical model; cylindrical contact; palliative
نوع نگارش مقاله: مقاله پژوهشی (Research Article)
شناسه دیجیتال (DOI): https://doi.org/10.1016/j.proeng.2018.06.001
دانشگاه: University of Seville, Camino de los Descubrimientos, Seville 41092, Spain
ناشر: الزویر - Elsevier
نوع ارائه مقاله: ژورنال
نوع مقاله: ISI
سال انتشار مقاله: 2018
ایمپکت فاکتور: 0.970 در سال 2018
شاخص H_index: 51 در سال 2019
شاخص SJR: 0.277 در سال 2018
شناسه ISSN: 1877-7058
فرمت مقاله انگلیسی: PDF
تعداد صفحات مقاله انگلیسی: 10
وضعیت ترجمه: ترجمه نشده است
قیمت مقاله انگلیسی: رایگان
آیا این مقاله بیس است: خیر
آیا این مقاله مدل مفهومی دارد: ندارد
آیا این مقاله پرسشنامه دارد: ندارد
آیا این مقاله متغیر دارد: ندارد
کد محصول: E12686
رفرنس: دارای رفرنس در داخل متن و انتهای مقاله
فهرست انگلیسی مطالب

Abstract


1-Introduction


2-Finite element model description


3-Fatigue method


4-Simulation schedule


5-Results


6-Conclusions


Acknowledgements


References

نمونه متن انگلیسی مقاله

Abstract


Currently, additive manufacturing with metals is an increasingly popular technique that allows the manufacturing of pieces of difficult shapes, nearly impossible to make with other techniques. Usually, these shapes try to optimize the solid to have the same strength with a lower weight. The fatigue behavior of the material of the components manufactured with this technique is a field in development. On the other hand, fretting fatigue is a common type of fatigue where a “stress concentration” appears due to the contact between two components. There are some procedures used to increase fatigue life in this situation (shot peening, surface knurling, etc.). This paper tries to analyze the possible beneficial effect on fatigue life of introducing voids inside the material in components under fretting, which is feasible now thanks to additive manufacturing. The problem under study is, for now, a 2D simplification where a cylinder is in contact with a half plane and a normal constant load and a variable tangential load are applied. This geometry has been numerically simulated, introducing a circular hole below the surface. The effect of this hole is to make the contact more elastic, which decreases the stresses near the surface. This work analyses and compares the stress and strain fields and Smith-Watson-Topper multiaxial fatigue parameter in the areas sensitives to fretting with respect to a case with homogeneous material (no internal voids). Various configurations changing different parameters like size and position of the hole, friction coefficient and the size of the slip zone have been considered. The problem analyzed in this paper is two-dimensional, therefore there would be no need to use additive manufacturing in a real situation. However, the results obtained in this paper indicate that it could also work in 3D. Actually, it is in a real three-dimensional problem where the additive manufacturing would be necessary for the introduction of voids inside the material to improve fatigue life.


Introduction


Fretting damage is a phenomenon that may occur on surfaces pressed together when subjected to cyclic loads. In addition to the bulk stress and the contact stresses produced by the pressure that keeps the surfaces together, components under the action of fretting are subjected to relative displacements. This combination leads to different types of damage such as wear, oxidation and the nucleation of cracks [1]. Various works shed light on different palliatives in fretting fatigue [2]. The palliatives can be divided between the ones that modify the geometry to in turn change the stress/strain fields, the ones that modify the properties of the material and surfaces (hardness, friction coefficient, etc.) or the ones that introduce residual stresses (shotpeening, etc). This paper focuses strictly on the modification of the geometry of the elements in contact so that it might be possible to mitigate, to the extent possible, the influence of fretting in crack initiation. This idea is linked to progress in additive manufacturing, thanks to which it can be made almost any type of geometry quickly, accurately and with a wide variety of metals, such as steel, aluminium and titanium. However, this is a field that is developing and there are not many accurate data about the behaviour of the material. The fatigue behaviour of the material manufactured in the traditional way differs from the behaviour of the components created by additive manufacturing [3]. This is due to the method of manufacturing layer by layer, causing an apparent anisotropy to the component as well as the inclusion of unwanted defects, porosity and residual stresses. In general, the new material is not completely homogenous and must undergo heat treatments to improve their mechanical properties.

  • اشتراک گذاری در

دیدگاه خود را بنویسید:

تاکنون دیدگاهی برای این نوشته ارسال نشده است

تسکین دهنده تنش در فرسودگی سایشی
نوشته های مرتبط
مقالات جدید
لوگوی رسانه های برخط

logo-samandehi

پیوندها