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Buckling and stress analysis of stiffened cylindrical shell structure under hydrostatic pressure
Other Title(s)
تحليل الاجهاد و الانبعاج للهياكل الاسطوانية المقواة تحت تأثير الضغط الهيدروستاتيكي
Author
Source
Issue
Vol. 6, Issue 2 (30 Jun. 2015), pp.101-114, 14 p.
Publisher
University of Kufa Faculty of Engineering
Publication Date
2015-06-30
Country of Publication
Iraq
No. of Pages
14
Main Subjects
Abstract AR
في هذا البحث يتم دراسة تحليل الإجهاد للاسطوانات المقواة و التي اعتمدت على نطاق واسع في الهياكل المتطورة و ذلك بسبب خصائصه الميكانيكية المميزة.
الانبعاج هو واحد من أهم أنواع الفشل الذي يصيب الاسطوانات و التي تدعونا إلى اهتمام أكثر.
في هذا البحث يتم تحليل و معايرة الاسطوانة بدون وجود حلقات تقوية داخلية أو خارجية و دراسة تحليل الإجهاد و الانبعاج في حالة الاسطوانة بوجود حلقات تقوية محيطية داخلية أو خارجية أو في حالة وجود حلقات تقوية طولية داخلية و خارجية و دراسة تحليل الإجهاد عند الانبعاج و على أعماق مختلفة من المحيط لمعرفة عند أي عمق سوف يتجاوز منطقة المرونة و يدخل بمرحلة التشوه اللدن و قد قمنا بدراسة الانبعاج للاسطوانات المقواة بطريقتين باستخدام المعادلات أو باستعمال برنامج (ANSYS) و عمل مقارنة بين الطريقتين و قد تحققت نتائج مقاربة.
Abstract EN
The present work investigates stress analysis and buckling analysis of cylindrical shell.
It had been wide applications in the industry especially in mechanical and nuclear applications..
etc.
The most common type of failure which may be happen in this type of structure was the buckling when was subjected to external hydrostatic pressure which represents the aim of this work.
The buckling happen due to transfer major amount of strain energy into bending energy which leads to sudden failure in the structure.
To avoid this type of failure the cylindrical shell must be stiffened by adding stiffeners rings along the shell from internal or external surface.
In this work two types of stiffeners existed, longitudinal and circumferential stiffeners based on the direction of the installation on the shell surface.
In this work the critical pressure due to buckling was calculated numerically by using ANSYS15 for both stiffened and un-stiffened cylinder for various location and installing types, strengthening of the cylinder causes a significant increase in buckling pressures than non reinforced cylinder.
Also the deflection for stiffened cylinder is function to mode shape and increasing with increasing the mode number because when the mode is increased, the strength of cylinder is increased and this leads to lower deflection.
Also the stress analysis due to buckling for different depths of sea water was done to find the critical depth which may be the stresses exceeded the elastic limit.
|And from stress analysis results, it is observed that there is not a huge difference in stresses between stiffened shell and un-stiffened shell in similar boundary and loading condition so the value of stresses in stiffened shell is a little lower compared to un-stiffened shell.
American Psychological Association (APA)
Badr, Qasim Hasan. 2015. Buckling and stress analysis of stiffened cylindrical shell structure under hydrostatic pressure. Kufa Journal of Engineering،Vol. 6, no. 2, pp.101-114.
https://search.emarefa.net/detail/BIM-608871
Modern Language Association (MLA)
Badr, Qasim Hasan. Buckling and stress analysis of stiffened cylindrical shell structure under hydrostatic pressure. Kufa Journal of Engineering Vol. 6, no. 2 (Jun. 2015), pp.101-114.
https://search.emarefa.net/detail/BIM-608871
American Medical Association (AMA)
Badr, Qasim Hasan. Buckling and stress analysis of stiffened cylindrical shell structure under hydrostatic pressure. Kufa Journal of Engineering. 2015. Vol. 6, no. 2, pp.101-114.
https://search.emarefa.net/detail/BIM-608871
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references : p. 113-114
Record ID
BIM-608871