.... Half tubes are used as the boundaries of the test sections on both sides. 13 12 2010 13 04 2011 25 01 2012 25 01 2012 elasticity mechanical stability pipes fluidelastic instability finned tubes effective diameter A significant cause of tube failures...

... relaxation into account. 06 04 2010 25 09 2011 26 09 2011 11 01 2012 11 01 2012 creep elasticity fasteners gaskets gasket creep relaxation clamp load loss gasketed bolted joints Gaskets are often used to create and maintain a seal between two separable...

... considered here. Hence, the leakage was caused by low-cycle fatigue with small-scale yielding. The procedure used to make predictions of low-cycle fatigue crack growth with small-scale yielding was based on the Dowling ΔJ procedure, which is an extension of linear-elastic fatigue crack growth methodology...

... Bree diagram considering the influences of various opening radius ratios r i / R i , thickness ratios R o / R i as well as different axial stress states. Then, two simplified shakedown assessment methods of perforated cylinders are discussed. The results indicate that elastic/plasticity shakedown...

... velocities ranging from less than 1 m/s to as high as 6 m/s. CANDU steam generators flow-induced vibration multispan U-tubes two-phase flow bars boilers design engineering dynamic response elasticity flow instability flow measurement heat transfer mechanical testing numerical...

...Feng Ju; John Aumuller; Zihui Xia; Pierre Du Plessis Coke drums are critical equipment in the petroleum industry. The failure modes of coke drums include excessive bulging deformation and fatigue cracking. The elastic-plastic behavior of a coke drum, subjected to both thermal and mechanical...

... , “ Fluidelastic Behavior of a Normal Triangular Array Subjected to Cross-Flow ,” J. Fluids Struct. , 5 , pp. 259 – 278 . 10.1016/0889-9746(91)90485-8 6 Mitra , D. , Dhir , V. K. , and Catton , I. , 2009 , “ Fluid-Elastic Instability in Tube Arrays Subjected to Air-Water and Steam-Water...

...Hany F. Abdalla; Maher Y. A. Younan; Mohammad M. Megahed A simplified technique for determining the lower bound shakedown limit load of a structure, employing an elastic–perfectly plastic (EPP) material model, was previously developed and successfully applied to a long radius 90 deg pipe bend...

...Shou-Jun Chen; Qi An; Yi Zhang; Qiang Li Tightening torque is one of the main factors that could affect the connection quality in threaded connections. On the basis of elastic mechanics and thick cylinder theory, this paper established a new analytical model based on the geometric parameters...

...Xiangqiao Yan; Baoliang Liu This paper deals with crack(s) emanating from a hole in infinite elastic plate in tension. Such a crack problem is called a hole crack problem for short. By extending Buckner’s principle suited for a crack to a hole crack problem in infinite plate in tension, here...

... unbalance around the flange when the bolts are subjected to initial tightening. The study compares the contact stress distribution variations, an analytical developed model based on the theory of rings on elastic foundation, to those given by the finite element model and the simple beam on elastic...

... distribution pattern is modeled and considered for the weld pool design. Elastic-plastic material properties at various temperatures are also considered for simulation. A detailed finite element analysis is carried out to predict the welding residual stress. In this, thermal analysis is carried out for actual...

...Mikel Abasolo; Josu Aguirrebeitia; Rafael Avilés; Igor Fernández de Bustos This paper presents a metamodel that enables estimation of the elastic interaction that occurs in the bolted joints of a wind generator tower during the tightening sequence. In this kind of joint, there is a gap between...

... and employs the small displacement formulation to determine the shakedown limit load (moment) without performing lengthy time consuming full cyclic loading finite element simulations or utilizing conventional iterative elastic techniques. The shakedown limit load is determined through the calculation...

... piping load interaction curves, nonlinear finite element analysis assuming the elastic perfectly plastic material model is performed by using the commercial finite element analysis software ANSYS and multiple piping load combinations, which are the combination of orthogonal bending moment components...

...Sayed A. Nassar; Mohan Ganganala A nonlinear model is proposed for studying the effect of the eccentricity of applied tensile forces on the clamp load loss in bolted joints that were initially tightened beyond the bolt elastic limit while the joint remained in the elastic range. A closed form...

... cylindrical shell with geodesical stiffener of finite length subjected to lateral or hydrostatic pressure. The material of each layer of the shell is assumed to be linearly elastic, anisotropic, and fiber-reinforced. The governing equations are based on a higher-order shear deformation shell theory with von...

... stress and the load change in bolted joints with full face gaskets. It proposes a simple analytical approach capable of predicting flange rotation and bolt load change during operation. The method is based on the gasket-bolt-flange elastic interaction, including flange rotational flexibility...

... of strain rates on strength and stiffness properties were also examined. 11 01 2010 01 06 2010 21 01 2011 21 01 2011 aluminium alloys ductility elasticity failure (mechanical) The behavior of materials may vary depending on their loading rates. As the applied strain...

...Daniel Vasilikis; Spyros A. Karamanos Thin-walled steel cylinders surrounded by an elastic medium, when subjected to uniform external pressure may buckle. In the present paper, using a two-dimensional model with nonlinear finite elements, which accounts for both geometric and material...