scholarly journals Structure of an ultrahigh internal pressure compound cylinder and its simulation by AMESim

2019 ◽  
Vol 2019 (13) ◽  
pp. 306-309
Author(s):  
Geqiang Li ◽  
Yanli Xv ◽  
Bin Zhou ◽  
Keqiang Xie ◽  
Wanhong Hua
Keyword(s):  
Internal Pressure ◽  
Compound Cylinder

Stress Analysis and Weight Savings of Internally Pressurized Composite-Jacketed Isotropic Cylinders

1990 ◽  
Vol 112 (4) ◽  
pp. 397-403 ◽  
Author(s):  
M. D. Witherell ◽  
M. A. Scavullo
Keyword(s):  
Experimental Study ◽  
Composite Material ◽  
Internal Pressure ◽  
Stress Analysis ◽  
Outer Diameter ◽  
Hoop Strain ◽  
Isotropic Cylinder ◽  
Orthotropic Composite Material ◽  
Compound Cylinder ◽  
Cylindrically Orthotropic

An isotropic cylinder designed to have a specific bore displacement per unit of internal pressure can be made lighter by removing material from the outer diameter and replacing it with the correct amount of a stiff lightweight composite material. A stress solution is presented for an internally pressurized compound cylinder constructed from an isotropic liner jacketed with a cylindrically orthotropic composite material. The solution is used to determine the set of compound cylinder geometries which have equivalent bore hoop strain to that of an isotropic monoblock cylinder. An equation for predicting the equivalent compound cylinder geometry which provides the maximum possible weight savings over the isotropic design is also presented. To verify the theory, an experimental study was conducted involving the measurement of bore strain for internally pressurized steel liners jacketed with a graphite bismaleimide composite.

Fatigue Analysis of Compound Cylinder Subjected to Repeated Internal Pressure

2006 ◽  
Author(s):  
Sunil A. Patil
Keyword(s):  
Internal Pressure ◽  
Yield Stress ◽  
Hoop Stress ◽  
Outer Cylinder ◽  
Fatigue Loading ◽  
External Pressure ◽  
Repeated Loading ◽  
Space Vehicles ◽  
Gaseous Fuels ◽  
Compound Cylinder

The cylindrical vessels are used for storing fluids at high pressure. If the magnitude of the internal/external pressure is closer to the yield strength of the material used, then no thickness of the material will prevent the failure of the vessel. Hence shrink-fitted compound cylinders are used, which can store the fluids at higher pressure closer to the yield stress of the material. Optimally designed compound cylinder has equal maximum hoop stress in both — the inner and outer cylinders. The value of this hoop stress is closer to the value of yield stress of the material used. Such compound cylindrical vessels can be used in future automobile and space vehicles for storing gaseous fuels. In such case, the compound cylinder will be subjected to repeated loading — the internal pressure varying from zero to maximum value. In this paper, an effort is made to analyze the compound cylinder under fatigue loading by using ANSYS DesignSpace FEA software. The analysis is interesting because the inner cylinder is subjected to fluctuating hoop stress varying in magnitude and direction; and the outer cylinder is subjected to hoop stress varying in magnitude only. Finally an effort is made to find out the optimum thickness of both the cylinders under fatigue loading.

Dependence of Internal Pressure-rise due to Arc on Current Waveform and Ignition Position

2011 ◽  
Vol 131 (7) ◽  
pp. 574-583 ◽  
Author(s):  
Shin-ichi Tanaka ◽  
Tsukasa Miyagi ◽  
Mikimasa Iwata ◽  
Tadashi Amakawa
Keyword(s):  
Internal Pressure ◽  
Pressure Rise ◽  
Current Waveform

Validation of a Belt Model for Prediction of Hub Forces from a Rolling Tire4

2009 ◽  
Vol 37 (2) ◽  
pp. 62-102 ◽  
Author(s):  
C. Lecomte ◽  
W. R. Graham ◽  
D. J. O’Boy
Keyword(s):  
Internal Pressure ◽  
Equations Of Motion ◽  
Three Dimensional ◽  
Prediction Method ◽  
Analytical Models ◽  
Beam Model ◽  
Impedance Boundary ◽  
Bending Waves ◽  
Tire Rotation ◽  
Three Dimensional Models

Abstract An integrated model is under development which will be able to predict the interior noise due to the vibrations of a rolling tire structurally transmitted to the hub of a vehicle. Here, the tire belt model used as part of this prediction method is first briefly presented and discussed, and it is then compared to other models available in the literature. This component will be linked to the tread blocks through normal and tangential forces and to the sidewalls through impedance boundary conditions. The tire belt is modeled as an orthotropic cylindrical ring of negligible thickness with rotational effects, internal pressure, and prestresses included. The associated equations of motion are derived by a variational approach and are investigated for both unforced and forced motions. The model supports extensional and bending waves, which are believed to be the important features to correctly predict the hub forces in the midfrequency (50–500 Hz) range of interest. The predicted waves and forced responses of a benchmark structure are compared to the predictions of several alternative analytical models: two three dimensional models that can support multiple isotropic layers, one of these models include curvature and the other one is flat; a one-dimensional beam model which does not consider axial variations; and several shell models. Finally, the effects of internal pressure, prestress, curvature, and tire rotation on free waves are discussed.

Stress Analysis of Tire Sections

1996 ◽  
Vol 24 (4) ◽  
pp. 349-366 ◽  
Author(s):  
T-M. Wang ◽  
I. M. Daniel ◽  
K. Huang
Keyword(s):  
Finite Element ◽  
Internal Pressure ◽  
Stress Analysis ◽  
Strain Analysis ◽  
Experimental Stress ◽  
Inflation Pressure ◽  
Substantial Agreement ◽  
Finite Element Stress Analysis ◽  
Strain Components ◽  
Fringe Patterns

Abstract An experimental stress-strain analysis by means of the Moiré method was conducted in the area of the tread and belt regions of tire sections. A special loading fixture was designed to support the tire section and load it in a manner simulating service loading and allowing for Moiré measurements. The specimen was loaded by imposing a uniform fixed deflection on the tread surface and increasing the internal pressure in steps. Moiré fringe patterns were recorded and analyzed to obtain strain components at various locations of interest. Maximum strains in the range of 1–7% were determined for an effective inflation pressure of 690 kPa (100 psi). These results were in substantial agreement with results obtained by a finite element stress analysis.

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