فرسودگی چند محوره اتصالات جوش داده شده
ترجمه نشده

فرسودگی چند محوره اتصالات جوش داده شده

عنوان فارسی مقاله: ارزیابی آسیب فرسودگی چند محوره اتصالات جوش داده شده در پل فولادی راه آهن با استفاده از رویکرد صفحه بحرانی
عنوان انگلیسی مقاله: Multiaxial Fatigue Damage Assessment of Welded Connections in Railway Steel Bridge using Critical Plane Approach
مجله/کنفرانس: پروسیدیای مهندسی – Procedia Engineering
رشته های تحصیلی مرتبط: مهندسی مکانیک، مهندسی عمران، جوشکاری
گرایش های تحصیلی مرتبط: ساخت و تولید، مهندسی راه و ترابری، صنایع فلزی، بازرسی جوش
کلمات کلیدی فارسی: فرسودگی چرخه بالا چند محوره، معیار Carpinteri-Spagnoli، پل راه آهن
کلمات کلیدی انگلیسی: Multiaxial high cycle fatigue, Carpinteri-Spagnoli criterion, Railway bridge
نوع نگارش مقاله: مقاله پژوهشی (Research Article)
شناسه دیجیتال (DOI): https://doi.org/10.1016/j.proeng.2018.02.073
دانشگاه: Department of Civil Engineering, NIT Patna 800005, India
صفحات مقاله انگلیسی: 12
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: E12625
رفرنس: دارای رفرنس در داخل متن و انتهای مقاله
فهرست مطالب (انگلیسی)

Abstract

1-Introduction

2-Description of railway steel bridge

3-Fatigue load models

4-Numerical modelling of bridge

5-Fatigue damage assessment

6-Results

7-Conclusions

Acknowledgements

References

بخشی از مقاله (انگلیسی)

Abstract

As the number of heavy railway traffic load increased, concern over the accurate and actual fatigue damage of the bridge is intensified. Especially for bridges which were designed for light traffic load. The fatigue damage assessment of steel bridge connections is usually based on notion of uniaxial S-N curves given in the codes of practice. Until now, there is no consensus on a method which can precisely consider non-proportional multiaxial loading. The objective of this paper is to examine the applicability and appropriateness of the critical plane approach-based C-S criterion to perform the fatigue damage assessment in welded connections in railway steel bridge. A regular U trough railway steel bridge is analyzed using finite element software ANSYS 17.2 for standard railway traffic. The averaged principal stress directions determined through appropriate weight functions are used to orient the critical plane. Prediction of fatigue damage is performed through an equivalent stress represented by a quadratic combination of the normal and the shear stress components acting on the critical plane. Applicability of the C-S criterion is studied by assessing the fatigue damage of critical welded connections and comparing with the λ – coefficient and cumulative damage method calculated according to Eurocode EN1993-1-9.

Introduction

Due to enhanced demand in Reliability, Availability, Maintainability and Serviceability (RAMS) of structural systems, there is an increase in demand to understand and estimate the precise fatigue damage in bridges. An advanced fatigue design methodology is required to recognize potential critical details introduced by specific design changes. So far, there is no precise and robust fatigue damage estimation tool particularly for welded details. Especially in bridges, stresses developed at welded connections are always multiaxial and non-proportional. Fatigue assessment based on the critical plane approach is generally accepted to be more accurate for multiaxial nonproportional loading. There are several multiaxial fatigue damage models in the literature which propose different damage parameters. In general, critical plane models require scanning over all planes intersecting the surface either orthogonally or at some inclination for maximum value of damage parameter. Also, the stress analysis has to be performed for each time step considered in the simulation of the train crossing. This complex and cumbrous task is simplified in the C-S criterion by applying some weight functions and linking the critical plane with mean principal stress directions.