Simulation of geometric pattern of surface flaws in railway rails
نویسندگان
چکیده
منابع مشابه
Residual Stress Evaluation of Railway Rails
Various stresses add to the railway rails and accumulate fatigue damage due to daily use. Fracture mechanics clarification concerning the growth behavior of cracks is needed, in order to decide the inspection period and the cycle [1], . Though the crack progression and influence of residual stress on fatigue strength has been researched [3] for many years, they are not clear now. The aims of th...
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چکیده ندارد.
15 صفحه اولSimulation of the Rupture of Ceramics from Surface Flaws
In this work the propagation of small surface flaws in polycrystalline ceramics has been computer-simulated in the case of dynamic fatigue. Local effective critical stress intensity factors and subcritical crack growth have been taken into account. It is shown that the rupture stress remains constant with varying initial flaw size in a large size domain. The results are compared and discussed w...
متن کاملSurface defects in rails
Despite significant efforts throughout the last decades, the mechanisms behind the formation of squats — a form of rolling contact fatigue (RCF) damage in rails — are not fully understood. Proposed causes of initiation involve, but are not limited to, small initial rail surface irregularities which yield high contact stresses, rail corrugation and varying friction conditions. To complicate matt...
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امروزه سالیتون ها بعنوان امواج جایگزیده ای که تحت شرایط خاص بدون تغییر شکل در محیط منتشر می-شوند، زمینه مطالعات گسترده ای در حوزه اپتیک غیرخطی هستند. در این راستا توجه به پدیده پراش گسسته، که بعنوان عامل پهن شدگی باریکه نوری در آرایه ای از موجبرهای جفت شده، ظاهر می گردد، ضروری است، زیرا سالیتون های گسسته از خنثی شدن پراش گسسته در این سیستم ها بوسیله عوامل غیرخطی بوجود می آیند. گسستگی سیستم عامل...
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ژورنال
عنوان ژورنال: Transportation Overview - Przeglad Komunikacyjny
سال: 2019
ISSN: 2544-6037,0033-2232
DOI: 10.35117/a_eng_19_06_03