scholarly journals Experiment and Theoretical Analysis Study of ETFE Inflatable Tubes

2014 ◽  
Vol 2014 ◽  
pp. 1-10 ◽  
Author(s):  
YanLi He ◽  
WuJun Chen
Keyword(s):  
Field Theory ◽  
Theoretical Analysis ◽  
Bifurcation Theory ◽  
Experimental Results ◽  
Load Bearing Capacity ◽  
Analysis Study ◽  
Bending Load ◽  
Wrinkling Analysis ◽  
Tension Field Theory ◽  
Theory And Experiment

The load bearing capacity of an ETFE (ethylene-tetra-fluoro-ethylene) inflatable tube is tested in this paper, and a comparative study of two wrinkling theories, the bifurcation theory and the tension field theory, is carried out for wrinkling analysis of the ETFE inflatable tube. Results obtained from the bifurcation theory and experiment reveal the limitations of tension field theory on the wrinkling analysis. The load-displacement curves of inflatable beams under bending load are obtained and compared with the experimental results; curves obtained using the bifurcation theory show coincidence with experimental curves, but the curves obtained using the tension field theory have noticeable deviations between calculated and experimental results.

Evaluation of Tension Field Theory for Wrinkling Analysis With Respect to the Post-Buckling Study

2004 ◽  
Vol 71 (4) ◽  
pp. 532-540 ◽  
Author(s):  
T. Iwasa ◽  
M. C. Natori ◽  
K. Higuchi
Keyword(s):  
Field Theory ◽  
Comparative Study ◽  
Strain Energy ◽  
Bifurcation Theory ◽  
Boundary Constraints ◽  
Compressive Stresses ◽  
Wrinkling Analysis ◽  
Post Buckling ◽  
Tension Field Theory ◽  
Geometrical Boundary

A comparative study of two representative wrinkling theories, a bifurcation theory and a tension field theory, is carried out for quantitative evaluation of the tension field theory regarding wrinkling analysis. Results obtained from the bifurcation theory show the limitations of tension field theory on the wrinkling analysis. Existence of compressive stresses caused by wrinkling phenomena, which is not accounted for tension field theory, is quantitatively presented. Considering strain energy due to these compressive stresses and geometrical boundary constraints, it is clarified that there are regions, in which the tension field theory is not properly applied.

Untersuchungen zum Übergang vom dynamischen zum kinematischen Reflexionsvermögen/Investigations on the Transition from Dynamical to Kinematical Reflection Power

1973 ◽  
Vol 28 (5) ◽  
pp. 610-614
Author(s):  
J. Kies ◽  
R. Köhler ◽  
W. Möhling ◽  
H. Peibst
Keyword(s):  
Theoretical Analysis ◽  
Bessel Function ◽  
Vibration Amplitude ◽  
Experimental Results ◽  
Ideal Crystal ◽  
Lattice Vector ◽  
Acoustoelectric Effect ◽  
Theory And Experiment

The diffraction behaviour of vibrating Cd S crystals was studied by theory and experiment. Vibrations were generated by the acoustoelectric effect. Their amplitudes reached up to 0.15 nm and their wave vectors were of the order of 5·106 m-1. Theoretical analysis of experimental results shows that a single reflection of an ideal crystal transforms into a series of satellite reflections. The intensity of the nth satellite is given by the usual equations1 replacing χh by χhJn (- hu) (Jn is the Bessel function of nth order, h a lattice vector, u the vibration amplitude, and χh the coefficient of the susceptibiliy expansion). With increasing vibration amplitude the number of satellites increases and the over all intensity approaches asymptotically the kinematical value.

Elastohydrodynamic Film Collapse During Rapid Deceleration. Part II—Theoretical Analysis and Comparison of Theory and Experiment

2000 ◽  
Vol 123 (2) ◽  
pp. 262-267 ◽  
Author(s):  
R. P. Glovnea ◽  
H. A. Spikes
Keyword(s):  
Theoretical Model ◽  
Analytical Solution ◽  
Theoretical Analysis ◽  
Film Thickness ◽  
Elastohydrodynamic Lubrication ◽  
Experimental Results ◽  
Rapid Deceleration ◽  
Film Collapse ◽  
Theory And Experiment

This paper presents a theoretical model for the behavior of elastohydrodynamic films subjected to transient speed conditions, based on Grubin’s analytical solution for elastohydrodynamic lubrication. This model is applied to predict film thickness in high deceleration conditions. The model’s predictions are compared with the experimental results presented in an accompanying paper entitled “Elastohydrodynamic Film Collapse During Rapid Deceleration. Part I: Experimental Results.”

Wrinkling Analysis of Stiffness Equivalence in Membrane Structures

2010 ◽  
Vol 163-167 ◽  
pp. 1976-1979
Author(s):  
Ran Zhao ◽  
De Min Wei
Keyword(s):  
Field Theory ◽  
Membrane Structure ◽  
New Method ◽  
Analysis Method ◽  
Equivalent Stiffness ◽  
Membrane Structures ◽  
Wrinkling Analysis ◽  
Tension Field Theory

Based on the tension field theory, a wrinkling analysis method of equivalent stiffness was proposed. The new method was derived and the feasibility was theoretically proved. And a membrane structure was analyzed by the method. The results show that the correct load responses could be quickly attained right after appearance of wrinkled elements, which indicate that the method can be applied to wrinkling analysis of membrane structures.

PHOTOINDUCED NONLINEAR OCTUPOLAR POLARIZATION: TRANSIENT AND PERMANENT REGIMES

1996 ◽  
Vol 05 (04) ◽  
pp. 653-670 ◽  
Author(s):  
CÉLINE FIORINI ◽  
JEAN-MICHEL NUNZI ◽  
FABRICE CHARRA ◽  
IFOR D.W. SAMUEL ◽  
JOSEPH ZYSS
Keyword(s):  
Theoretical Analysis ◽  
Second Harmonic ◽  
Experimental Results ◽  
Polar Field ◽  
Rotational Spectrum ◽  
Dual Frequency ◽  
One Dimensional ◽  
Ethyl Violet ◽  
Disperse Red 1 ◽  
Good Agreement

An original poling method using purely optical means and based on a dual-frequency interference process is presented. We show that the coherent superposition of two beams at fundamental and second-harmonic frequencies results in a polar field with an irreducible rotational spectrum containing both a vector and an octupolar component. This enables the method to be applied even to molecules without a permanent dipole such as octupolar molecules. After a theoretical analysis of the process, we describe different experiments aiming at light-induced noncentrosymmetry performed respectively on one-dimensional Disperse Red 1 and octupolar Ethyl Violet molecules. Macroscopic octupolar patterning of the induced order is demonstrated in both transient and permanent regimes. Experimental results show good agreement with theory.

Unbalance Response of a Dual Rotor System: Theory and Experiment

1993 ◽  
Vol 115 (4) ◽  
pp. 427-435 ◽  
Author(s):  
K. Gupta ◽  
K. D. Gupta ◽  
K. Athre
Keyword(s):  
System Theory ◽  
Transfer Matrix ◽  
Mode Shape ◽  
Reasonable Agreement ◽  
Complex Variables ◽  
Rotor System ◽  
Experimental Results ◽  
Unbalance Response ◽  
Theoretical Results ◽  
Theory And Experiment

A dual rotor rig is developed and is briefly discussed. The rig is capable of simulating dynamically the two spool aeroengine, though it does not physically resemble the actual aeroengine configuration. Critical speeds, mode shape, and unbalance response are determined experimentally. An extended transfer matrix procedure in complex variables is developed for obtaining unbalance response of dual rotor system. Experimental results obtained are compared with theoretical results and are found to be in reasonable agreement.

The statistical thermodynamics of solutions of non-spherical molecules. I. The thermodynamic functions

1955 ◽  
Vol 229 (1177) ◽  
pp. 271-280 ◽  
Keyword(s):  
Carbon Tetrachloride ◽  
Equation Of State ◽  
Thermodynamic Functions ◽  
Statistical Thermodynamics ◽  
Intermolecular Forces ◽  
Pure Component ◽  
Experimental Results ◽  
Thermodynamics Of Solutions ◽  
Theory And Experiment

The perturbation treatment of the orientational forces between non-spherical molecules proposed by Cook & Rowlinson (1953) is extended to mixtures by using the theory of solutions put forward by Longuet-Higgins (1951). The thermodynamic functions and the equation of state of such mixtures are expressed in terms of the intermolecular forces and the properties of one pure component. Expressions are derived for the excess (or non-ideal) thermodynamic functions which are compared with the experimental results on the four solutions, benzene+ cyclohexane , benzene+carbon tetrachloride, benzene + ethylene dychloride, and cyclohexane + carbon tetrachloride. The agreement between theory and experiment is improved by taking account of the orientational forces.

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