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عنوان فارسی مقاله: یک روش عددی برای تعیین مقاومت در برابر فرسودگی اتصالات جوش داده شده با بهبود قابل توجه در دقت
عنوان انگلیسی مقاله: A numerical method for determining the fatigue strength of welded joints with a significant improvement in accuracy
مجله/کنفرانس: پروسیدیای مهندسی – Procedia Engineering
رشته های تحصیلی مرتبط: جوشکاری
گرایش های تحصیلی مرتبط: بازرسی جوش
کلمات کلیدی فارسی: ارزیابی فرسودگی، اسکن لیزری، هندسه واقعی، اجزا جوش داده شده
کلمات کلیدی انگلیسی: fatigue assesment; laser scan; real geometry; welded components
نوع نگارش مقاله: مقاله پژوهشی (Research Article)
شناسه دیجیتال (DOI): https://doi.org/10.1016/j.proeng.2018.02.036
دانشگاه: Department of Engineering Sciences, Unit of Steel Construction and Mixed Building Technology, University of Innsbruck, 6020 Innsbruck, Austria
صفحات مقاله انگلیسی: 15
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
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: E12478
رفرنس: دارای رفرنس در داخل متن و انتهای مقاله
فهرست مطالب (انگلیسی)
Abstract
1-Introduction
2-Approaches of fatigue assessment based on notch stresses
3-Calculation sequence when using the Finite Element Method
4-Application of a probabilistic approach on welded specimens
5-Discussion of the approaches and results
References
بخشی از مقاله (انگلیسی)
Abstract
Modelling fatigue assessments for welded components is a challenging task as to achieving accurate results. Several influence factors reduce accuracy and often the difference between the calculated and the effective fatigue life is located in the range of factor 10 and above. This conference paper presents two advanced methods which allow the achievement of better accuracy. The main aspect consists in taking the geometry into account, a procedure that leads, though, to the need of adapting the existing methods for fatigue assessment. One of these advanced methods is used to examine a detail which has been welded with different welding processes and on different positions.
Introduction
In steel and mechanical engineering, there are numerous concepts dealing with the calculation of fatigue strength in the range of high cycle fatigue of mild-steel welded structures. However, in many cases and due to various reasons, the accuracy in the computational determination of the fatigue strength and of the possible number of stress cycles leading to failure is very imprecise. Assessment procedures applied in practical engineering are sometimes built on more or less pure empiric findings rather than on the numerical description of the failure process. Fatigue assessment is often performed by post-processing elastic stress fields, neglecting the local yielding which often occurs in notched areas. From a theoretical point of view, the reason for such a procedure may be the common understanding of the fatigue problem as being of brittle nature, at least on the scale of engineering consideration. In addition, certain aspects of cyclic plasticity, which are not fully understood, do not have to be dealt with. From a practical point of view, elasto-plastic finite element calculations, which are said to be time consuming are avoided [1]. It is well known, that under the assumption of linear-elastic material behavior, stresses are high in notched areas; therefore, a direct comparison to the materials fatigue strength cannot be performed. Besides the nominal stress approach, many of the design concepts apply a form of effective stress or strain definition based on various underlying ideas.