Emergency Stop and Drive Analysis of Bolted Flange Joints

2015 ◽  
Vol 799-800 ◽  
pp. 585-588
Author(s):  
Yan Zhang ◽  
He Hui Wang
Keyword(s):  
Finite Element ◽  
Finite Element Simulation ◽  
Temperature Fluctuations ◽  
Calculation Procedure ◽  
Element Simulation ◽  
Sealing Performance ◽  
Drive Condition ◽  
Emergency Stop ◽  
Bolted Flange

The strength and tightness of flange joints will be weaker due to the temperature fluctuations. There exists no mature calculation procedure that can accounts for the temperature fluctuations’ effect on the performance of flanged joint. Based on the finite element simulation of a flanged joint under emergency stop and drive condition using ANSYS, the strength integrity and sealing performance of it are evaluated according to code JB4732-2005. The results show that stress of every component increases after experiencing an emergency stop and drive, flange deflection is more serious, resulting in integrity and tightness failure and can’t meet the sealing requirements. Repeatedly stop and drive will lead to discontinuity and alternating loads for the flanged joints, which will increase the leakage trend.

Finite Element Simulation of Sealing Performance in Bolted Flange Joints of Longitudinal Baffle Type Heat Exchanger

2011 ◽  
Author(s):  
Hiroshi Yamanaka
Keyword(s):  
Finite Element ◽  
Heat Exchanger ◽  
Heat Exchangers ◽  
Finite Element Analyses ◽  
Oil Refineries ◽  
Element Simulation ◽  
Start Up ◽  
Bolt Preload ◽  
Sealing Performance ◽  
Bolted Flange

Bolted flange joints are used in heat exchangers and piping of oil refineries, chemical refineries and various other industries. Above all, it is reported that bolted flange joints of longitudinal baffle type heat exchanger are easy to leak as compared with other type heat exchangers in start up of units. In this study, outside influence on operating and structure of longitudinal baffle type heat exchanger which affect sealing performance were analyzed using finite element analyses to prevent leakage accidents. As a result, it is understood that the sealing performance in bolted flange joints decreases remarkably when the shell of heat exchanger transforms like a bow with a rise in temperature. In addition, it is clarified that retightening, increases in bolt preload and thickness of gasket keep sealing performance well in bolted flange joints of longitudinal baffle type heat exchanger.

Finite Element Simulation for Bolted Flange Joints Assembly With Misalignment

2009 ◽  
Author(s):  
Takashi Konnai ◽  
Hirokazu Tsuji ◽  
Yasumasa Shoji
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Stress Distribution ◽  
Finite Element Simulation ◽  
Bending Moment ◽  
Acceptance Criteria ◽  
Element Analysis ◽  
Ring Type ◽  
Element Simulation ◽  
Bolted Flange

JIS B 2251 (former HPIS Z 103 TR) is published as the assembly guidelines for bolted flanged joints with ring-type gasket, which employs the rotational clockwise tightening sequence in the main tightening step. Actual flanged joints have misalignment, and when the flanged joints are assembled, the bending moment to modify the influence of the misalignment acts on the flange faces. There is risk that the uniformity of gasket stress distribution is affected by the bending moment of the misalignment. So, the influence of the misalignment on the uniformity of the gasket stress distribution is investigated using finite element analysis. Consequently, setting the acceptance criteria of the misalignment to get the uniformity of gasket stress distribution. The influence of the uniformity of the gasket stress distribution in case of changing the starting tightening bolt against the direction of the misalignment is also investigated.

Finite Element Simulation of Tire-Rim Interface

1989 ◽  
Vol 17 (4) ◽  
pp. 305-325 ◽  
Author(s):  
N. T. Tseng ◽  
R. G. Pelle ◽  
J. P. Chang
Keyword(s):  
Finite Element ◽  
Finite Element Model ◽  
Finite Element Simulation ◽  
Contact Pressure ◽  
Element Model ◽  
Experimental Measurements ◽  
Inflation Pressure ◽  
Interference Fit ◽  
Element Simulation ◽  
Rubber Composite

Abstract A finite element model was developed to simulate the tire-rim interface. Elastomers were modeled by nonlinear incompressible elements, whereas plies were simulated by cord-rubber composite elements. Gap elements were used to simulate the opening between tire and rim at zero inflation pressure. This opening closed when the inflation pressure was increased gradually. The predicted distribution of contact pressure at the tire-rim interface agreed very well with the available experimental measurements. Several variations of the tire-rim interference fit were analyzed.

Numerical Simulation of Tire Sliding Events Involving Impacts with Holes and Bumps

1986 ◽  
Vol 14 (2) ◽  
pp. 125-136 ◽  
Author(s):  
Y. Nakajima ◽  
J. Padovan
Keyword(s):  
Numerical Simulation ◽  
Finite Element ◽  
Finite Element Simulation ◽  
Full Range ◽  
Arbitrary Geometry ◽  
Operating Environments ◽  
Element Simulation ◽  
Simulation Scheme

Abstract This paper extends the finite element simulation scheme to handle the problem of tires undergoing sliding (skidding) impact into obstructions. Since the inertial characteristics are handled by the algorithm developed, the full range of operating environments can be accommodated. This includes the treatment of impacts with holes and bumps of arbitrary geometry.

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