Askari, M., Parvizi, A., Ali Karami, S. (2014). Fluidity Onset Analysis in FG Thick-Walled Spherical Tanks under Concurrent Pressure Loading and Heat Gradient. Journal of Simulation and Analysis of Novel Technologies in Mechanical Engineering, 7(2), 57-49.
M. Askari; A. Parvizi; Sh. Ali Karami. "Fluidity Onset Analysis in FG Thick-Walled Spherical Tanks under Concurrent Pressure Loading and Heat Gradient". Journal of Simulation and Analysis of Novel Technologies in Mechanical Engineering, 7, 2, 2014, 57-49.
Askari, M., Parvizi, A., Ali Karami, S. (2014). 'Fluidity Onset Analysis in FG Thick-Walled Spherical Tanks under Concurrent Pressure Loading and Heat Gradient', Journal of Simulation and Analysis of Novel Technologies in Mechanical Engineering, 7(2), pp. 57-49.
Askari, M., Parvizi, A., Ali Karami, S. Fluidity Onset Analysis in FG Thick-Walled Spherical Tanks under Concurrent Pressure Loading and Heat Gradient. Journal of Simulation and Analysis of Novel Technologies in Mechanical Engineering, 2014; 7(2): 57-49.
Fluidity Onset Analysis in FG Thick-Walled Spherical Tanks under Concurrent Pressure Loading and Heat Gradient
1- MSc Student, Department of Mechanical Engineering, Science & Research Branch, Islamic Azad University, Tehran, Iran
2Assistant Prof., Department of Mechanical Engineering, Tehran University, Tehran, Iran
3MSc Student, Department of Mechanical Engineering, Science & Research Branch, Islamic Azad University, Tehran, Iran.
Abstract
In this paper,fluidity onset analysis in FG thick-walled spherical tanks under concurrent pressure loading and heat gradient has been presented. Designing thick-walled spherical tanks under pressure as tanks holding fluids under heat loads with high heat gradients require new approaches. Under high internal pressure and high temperature, the tank enters the plastic stage in a part of its thickness; hence, for designing, a tank, which necessitates the onset of fluidity, is required for pressure study and heat gradient. Elasticity module, tensile yield, heat flow coefficient and heat expansion coefficient change gradually and, according to the power model, along radial direction. In order to describe the material behavior in the plastic area in the FG thick-walled spherical tank under internal pressure and heat gradient, Treska yield index has been used, and materials’ behavior has been assumed to be in elastic-plastic form.
تحلیل شروع سیلان در مخازن کروی جداره ضخیم FGتحت بارگذاریهمزمان فشاری و گرادیان دمایی
Authors [Persian]
منصور عسگری, علی پرویزی, شهریار علی کرمی
Abstract [Persian]
در این مقاله، تحلیل شروع سیلان در مخازن کروی جداره ضخیم FG تحت تاثیر بارگذاری همزمان فشار داخلی و گرادیان دمایی ارائه شده است. طراحی مخازن جدارهضخیم کروی تحت‌فشار،به عنوان محفظه نگهدارنده سیالات تحت بارهای حرارتی باگرادیان‌های دمایی بالا نیازمند به راهکاری جدید است. تحت فشار داخلی زیاد و دمای بالا، مخزن در بخشی از ضخامت خود وارد محدوده پلاستیک میشود؛ لذا، برای طراحی مخزن بررسی فشار و گرادیان دمایی که موجب شروع سیلان میشود نیاز است. مدول الاستیسیته، تنش تسلیم، ضریب هدایت گرمایی و ضریب انبساط حرارتی به صورت تدریجی و طبق مدل توانی و در راستای شعاعی تغییر میکنند. برای توصیف رفتار ماده در ناحیه پلاستیک در کره جدار ضخیم FG تحت فشار داخلی و گرادیان دمایی، از معیار تسلیم ترسکا استفاده شده ورفتار مواد به صورت الاستیک- پلاستیک کامل فرض شده است.
Keywords [Persian]
شروع سیلان، کره جداره ضخیم FG، بارگذاری همزمان، بارگذاری فشاری و گرادیان دمایی
References
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