نتایج جستجو برای: axisymmetric body of revolution
تعداد نتایج: 21206509 فیلتر نتایج به سال:
In this paper, we find the energy-momentum distribution of stationary axisymmetric spacetimes in the context of teleparallel theory by using Möller prescription. The metric under consideration is the generalization of the Weyl metrics called the Lewis-Papapetrou metric. The class of stationary axisymmetric solutions of the Einstein field equations has been studied by Galtsov to include the grav...
مقدمه و هدف : یکی از مهمترین مراحل در ساخت یک پروتز با تطابق غیرفعال قالب گیری می باشد. هدف از انجام مطالعه حاضر بررسی دقت قالب گیری توسط ویسکوزیته های مختلف ماده پلی وینیل سایلوکسان (pvs) با استفاده از دو روش مستقیم و غیر مستقیم می باشد. مواد و روش ها : در این مطالعه 4 عدد فیکسچر از سیستم تجاری dio به صورت کاملا موازی بر روی یک مدل مرجع از فک پایین تعبیه شد. سپس با استفاده از سه ویسکوزیته...
Since the audience satisfaction of programs related to Islamic revolution has an important role in their decision to watch these programs that consequently exerts impact on how the audience learn about the phenomenon of Islamic revolution, therefore, through deeper understanding of these factors and planning to increase audience satisfaction, the officials in charge of these programs may utiliz...
Abstract-We study dynamic axisymmetric thermomechanical deformations of a viscoplastic cylinder with its boundaries assumed to be thermally insulated, its mantle traction free, and its top and bottom surfaces compressed at a prescribed rate. We consider two limiting cases of the frictional force between the loading device and the cylinder, i.e. either there is no sliding between the two surface...
In this study, the non-linear creep behaviour of a thick-walled cylinder made of stainless steel 316 is investigated using a semi-analytical method. The thick-walled cylinder is under a uniform internal pressure and a non-axisymmetric thermal field as a function of the radial and circumferential coordinates. For the high temperature and stress levels, creep phenomena play a major role in stress...
So far, there have been three major technological advances. The first industrial revolution in Britain began and hydraulic and steam machines were introduced to factories. The Second Industrial Revolution differentiated between components and assembly of products based on the division of labor. This led people to the era of cost-effective products and mass production. The Third Industrial Revol...
Background: All revolutions occurred for ages have undergone two hard phases which has special importance. One is the occurrence of the revolution and the other is the constancy and continuity of the revolution, so as to achieve its goals. Sustaining and maintaining revolution is more arduous and difficult task between the two mentioned principals.The Islamic Republic revolution of Iran is not ...
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