... in single- and two-phase flows and fretting wear in process equipment, such as heat exchangers and steam generators. Connors critical velocity will be discussed as a measure of initiating fluidelastic instability. Vibro-impact of heat exchanger tubes and the random excitation by the cross-flow can produce...

...Avanish Mishra; Amer Hameed; Bryan Lawton An accurate modeling of gun barrel temperature variation over time is important to assess wear and the number of shot fires needed to reach cook-off. Using lumped parameter methods, an internal ballistics code was developed to compute heat transfer...

... [ t ( D f − D b ) + p D b ] where p is the fin pitch, t is the fin thickness, D f is the fin diameter, and D b is the bare tube diameter. flow instability heat exchangers pipe flow pipes turbulence vibrations vortices wear...

... and fretting wear in process equipment such as heat exchangers and steam generators. Connors critical velocity will be discussed as a measure of initiating fluid-elastic instability. Vibro-impact of heat exchanger tubes and the random excitation by the cross-flow can produce a progressive damage...

... stations pipelines pipes wear Most nuclear power plants have inspection programs in place to control flow-accelerated corrosion (FAC). FAC is a well-known phenomenon that has been extensively documented ( 1 ). FAC is a corrosion process caused by the dissolution of the normally protective oxide...

... stress developed as a result of further applied internal pressures. The process of autofrettage is therefore very useful in improving the fatigue life of cylinders because of the reduction in stress. fatigue finite element analysis pressure vessels shapes (structures) wear 08 08 2007...

... is repaired by overlay welding. It is desirable to manage the distortion caused by overlay welding so that the hydraulic efficiency of the turbine is not reduced. arc welding maintenance engineering optimisation plates (structures) turbines wear welds 29 01 2009 22 09 2009 09...

... wear processes encountered on the surface of metal pipes. Fluid-structure interactions have a profound influence on such erosion-corrosion phenomena. This paper is focused on the multiphase flow-induced erosion-corrosion phenomena in pipes, with multiscale analysis, to study the interactions between...

... for special loading cases. 13 08 2008 20 01 2009 23 09 2009 Bauschinger effect elasticity internal stresses pipes plasticity polynomials steel wear work hardening analytical solution autofrettage residual stresses thick-walled tube In hydraulic autofrettage...

...C. Zhang; M. J. Pettigrew; N. W. Mureithi Two-phase cross flow exists in many shell-and-tube heat exchangers. Flow-induced vibration excitation forces can cause tube motion that will result in long-term fretting-wear or fatigue. Detailed vibration excitation force measurements in tube bundles...

.... Increasing the pressure while keeping the jet diameter fixed will increase both the power and the power density. This will result in increased cutting speed and less taper. The operating cost of the abrasive waterjets process consists mainly of the costs of abrasives, nozzle wear, utility, and maintenance...

...Y. A. Khulief; S. A. Al-Kaabi; S. A. Said; M. Anis Flow-induced vibrations due to crossflow in the shell side of heat exchangers pose a problem of major interest to researchers and practicing engineers. Tube array vibrations may lead to tube failure due to fretting wear and fatigue. Such failures...

... for overstraining gun tubes: hydrostatic autofrettage or swage autofrettage ( 1 ). Bauschinger effect compressive strength fatigue finite difference methods internal stresses iterative methods pipes weapons wear 26 09 2006 24 04 2007 02 10 2008 Kendall , D. P...

...Xinjian Duan; Michael J. Kozluk; Sandra Pagan; Brian Mills Aging steam generator tubes have been experiencing a variety of degradations such as pitting, fretting wear, erosion-corrosion, thinning, cracking, and denting. To assist with steam generator life cycle management, some defect-specific flaw...

... with specific defect configurations: elliptical wear-type, tapered wedge-type, and flat wear-type defects. After investigating the effect of key parameters such as defect depth, defect length, and wrap or tapered angle on equivalent stress across the ligament thickness, burst pressure estimation equations...

...Y. Hwang; S. Deng The primary cause of gun barrel erosion is the heat generated by the shell as its travels along the barrel. Therefore, calculating the heat flux input to the gun bore is very important when investigating wear problems in the gun barrel and examining its thermomechanical properties...

... the ideal and the realistic autofrettage cases. 31 12 2006 28 03 2007 06 06 2008 Bauschinger effect cracks finite element analysis internal stresses pressure vessels shells (structures) wear Pressure vessels, mostly cylindrical, are widely used in many industries...

...Quamrul H. Mazumder; Siamack A. Shirazi; Brenton McLaury Erosive wear damage of elbows due to solid particle impact has been recognized as a significant problem in several fluid handling industries. Solid particle erosion is a complex phenomenon due to different parameters causing material removal...

...C. Zhang; M. J. Pettigrew; N. W. Mureithi Two-phase cross flow exists in many shell-and-tube heat exchangers. Flow-induced vibration excitation forces can cause tube motion that will result in long-term fretting wear or fatigue. Detailed flow and vibration excitation force measurements in tube...

... Pressures and to Temperature Gradients ,” J. Mech. Phys. Solids 0022-5096 , 4 , pp. 145 – 161 . ANSYS , 2004 , University Research Version, 7.1, SAS IP, Inc. 19 12 2005 21 11 2006 pressure vessels Bauschinger effect stress-strain relations internal stresses wear...