کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
5019731 1468311 2017 10 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Numerical measures of non-proportionality degree in incomplete contact subjected to fretting fatigue loading
ترجمه فارسی عنوان
اندازه گیری های عددی درجه عدم انطباق در تماس ناقص در معرض بارگذاری خستگی فت
کلمات کلیدی
مدل سازی عددی، خستگی مفرط، فاکتور عدم انصاف، تماس ناقص،
موضوعات مرتبط
مهندسی و علوم پایه سایر رشته های مهندسی مهندسی مکانیک
چکیده انگلیسی
Fretting fatigue failure is a fatigue fracture that initiates at a surface area where fretting has occurred. Fretting fatigue life assessment under multiaxial loading is a rather complex task, as the stresses at contact interface are multiaxial. A phase-shift between stress components leads to lower equivalent stress values calculated by most of available multiaxial fatigue criteria and therefore to an increased estimated fretting fatigue life. In this study a correlation based non-proportionality factor is introduced to predict the fretting fatigue lifetime under non-proportional stressing. The proposed factor is based on a statistical correlation of normal and shear stress components and does not depend on the choice of the coordinate system. A two dimensional finite element model is used to extract the stress components at crack initiation site. Moreover, to enhance the fretting fatigue lifetime assessment, stress-based Findley multiaxial fatigue criterion is modified by introducing the non-proportionality factor. A series of experimental data of high strength CrNi steel, taken from literature, are used to investigate the effect of non-proportional stressing on fretting fatigue life prediction.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Theoretical and Applied Fracture Mechanics - Volume 90, August 2017, Pages 33-42
نویسندگان
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