... the loosening performance. Cumulative differential loosening rotation of the bolt head is converted to a gradual loss in the bolt tension and joint clamp load. Model prediction of the self-loosening behavior is experimentally validated. From the free body diagram of the fastener in Fig. 4 , the frictional...

... in this element stabilizes with time. Behavior of the gasket elastic element K 1 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...

... fasteners finite element analysis flanges gaskets pipes stress-strain relations thermal expansion Young's modulus pipe flange connection leakage FEM elevated temperature nonlinear sheet gasket It is particularly important for the safety management of pipe lines to determine...

... prediction method proposed in this paper was also validated against the experimental data presented by other researchers, and the errors between the predicted values and the experimental results were within 18%. 26 02 2010 02 03 2011 07 12 2011 07 12 2011 creep fasteners finite...

... (structures) fasteners finite element analysis internal stresses reliability stress measurement welding weldment residual stress slitting method contour method Welding is widely used in the fabrication of pressure vessels and pipe-work for power plants. This joining process is known...

... joint components are given. The results from the proposed analytical model are compared with those obtained from finite element models. 18 02 2011 26 04 2011 02 05 2011 02 12 2011 02 12 2011 fasteners finite element analysis flanges heat exchangers seals (stoppers...

... ( r i ) is the corresponding shear plastic strain increment, and d p ¯ ( r i ) represents the equivalent plastic strain increment. 09 01 2010 06 07 2011 06 07 2011 02 12 2011 02 12 2011 clamps elastoplasticity elongation fasteners...

... components on a vibration-isolation table. A MATLAB software is developed for image acquisition and phase data calculations that yield the out-of-plane surface deformation caused by the bolt preload. The test fixture uses an M12 steel fastener and aluminum joint. For miniature screw applications, however...

... the stress amplitude at the first thread root of bolt. 10 09 2009 26 05 2011 03 10 2011 03 10 2011 failure (mechanical) fasteners fatigue finite element analysis stress analysis Threaded fasteners are the most widely used machine elements to clamp structural members...

.... assembling beams (structures) elasticity fasteners finite element analysis flanges gaskets leak detection maintenance engineering mechanical contact occupational safety pipes pressure vessels rings (structures) 25 02 2010 10 07 2010 16 05 2011 16 05 2011 2011...

... 2011 09 05 2011 elasticity fasteners finite element analysis flanges mechanical contact Bolted joints are tightened so as to obtain a uniform preload in all of the bolts since this improves the behavior of the joint ( 1 2 3 4 5 ). In the case of wind generators, the preload...

... an external separating load. After the initial tightening of the fastener past its elastic limit, the subsequent application of a tensile separating force on the joint tends to increase the fastener tension in a nonlinear fashion, and, simultaneously, reduce the clamping force in the bolted joint from its...

... 10 02 2011 design engineering elasticity fasteners flanges gaskets Appendices 2 and Y ( 1 2 ) of the ASME code Sec. VIII cover flanges with a ring gasket located within the bolt circle and flanges with metal to metal contact outside the bolt circle, respectively. The first one...

... fastener tension F c clamping force F i initial fastener tension (preload) F e separating force δ b fastener elongation δ c joint compression K b bolt stiffness K b ′ equivalent bolt...

.... A rectangular box-shape bolted flange connection with a compressed sheet gasket subjected to internal pressure Figure 1 shows a rectangular box-shape bolted flange connection with a compressed sheet gasket fastened by bolts and nuts with a bolt preload F f . When the assembly is subjected...

... fasteners finite element analysis flanges mechanical contact Before the advent of digital methods, a multitude of approaches, theories, and experimental studies had been conducted in order to analyze the behavior of bolted flange joints with metal-to-metal contact beyond the bolt circle. In 1967...

... by minimizing the bolt-to-bolt clamp load variation caused by elastic interaction among the various bolts in the joint during initial joint-bolt-up. 23 04 2008 14 12 2009 05 05 2010 05 05 2010 couplings fasteners finite element analysis plasticity reliability elastic...

... stress and bolt bending stress. 02 07 2008 27 07 2009 08 10 2009 bending fasteners finite element analysis heat transfer thermal stresses The magnitude of bolt preload is varied when the bolted joint is subjected to thermal load. It is caused by the difference...

...Sayed A. Nassar; Xianjie Yang Novel formulation was proposed for studying bolt elastic interaction during the tightening of a group of fasteners in flat faced gasketed joints. The model was used for developing tightening strategies that would achieve a more uniform clamp load in the flange...

... durability fasteners flanges reliability seals (stoppers) structural engineering nongasketed joint combined operating axial bending sealing strength Different types of flange joints evolved over the centuries and were adequate for their duties at low pressure and temperature...