Experimental–theoretical analysis of local stresses in box girders of trapezoidal cross section

An actual case of PTH fracture after soldering process was studied. By means of cross section analysis using metallography microscope and SEM, together with thermal analysis results, root cause of PTH fracture was concluded that a high density of twin copper weakened the mechanical strength so seriously that PTHs could not undergo thermal stress from soldering process, and higher CTE was attributed to an accelerative factor. Moreover, it is recommended to enhance current density properly and make sure the effectiveness of electroplating additives to prevent twin copper by theoretical analysis.

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Modeling of the Ionized Fluid Flow through a Cone-Shaped Nanopore

Solid State Phenomena ◽

10.4028/www.scientific.net/ssp.121-123.1089 ◽

2007 ◽

Vol 121-123 ◽

pp. 1089-1092 ◽

Cited By ~ 1

Author(s):

Jian Zhong Fu ◽

Xiao Bing Mi ◽

Yong He ◽

Zi Chen Chen

Keyword(s):

Fluid Flow ◽

Theoretical Analysis ◽

Cross Section ◽

Debye Length ◽

Velocity Profiles ◽

Gradual Change ◽

Ion Flow ◽

Flow Through

Theoretical analysis of the ionized fluid flowing through a cone-shaped nanopore is presented. The internal cross section of the cone-shaped channel is in the range from micro- to nanometer and gradual change from larger to smaller than the Debye length for the ions. The model is developed to predict the ionized fluid flow behaviors in cone-shaped micro/nanochannels. The velocity profiles of ion flow that occur in nanopores are obtained.

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Dispersion characteristics of the anisotropic dielectric strip waveguides with trapezoidal cross-section

APMC 2001. 2001 Asia-Pacific Microwave Conference (Cat. No.01TH8577) ◽

10.1109/apmc.2001.985504 ◽

2002 ◽

Author(s):

Ching-Her Lee ◽

Jean-Fu Kiang ◽

Chung-I G Hsu ◽

Ying-Jiunn Lai

Keyword(s):

Cross Section ◽

Dispersion Characteristics ◽

Anisotropic Dielectric ◽

Trapezoidal Cross Section

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THE ANOMALOUS PROCESS γπ → ππ AND ITS IMPACT ON THE π0 TRANSITION FORM FACTOR

International Journal of Modern Physics Conference Series ◽

10.1142/s2010194514603974 ◽

2014 ◽

Vol 35 ◽

pp. 1460397

Author(s):

BASTIAN KUBIS

Keyword(s):

Form Factor ◽

Phase Shift ◽

Theoretical Analysis ◽

Cross Section ◽

Transition Form Factor ◽

P Wave ◽

Chiral Anomaly ◽

Transition Form ◽

Dispersive Representation ◽

Important Input

The process γπ → ππ, in the limit of vanishing photon and pion energies, is determined by the chiral anomaly. This reaction can be investigated experimentally using Primakoff reactions, as currently done at COMPASS. We derive a dispersive representation that allows one to extract the chiral anomaly from cross-section measurements up to 1 GeV, where effects of the ρ resonance are included model-independently via the ππ P-wave phase shift. We discuss how this amplitude serves as an important input to a dispersion-theoretical analysis of the π0 transition form factor, which in turn is a vital ingredient to the hadronic light-by-light contribution to the anomalous magnetic moment of the muon.

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Theoretical analysis of the electrical and magnetic field distributions in a toroidal core with circular cross section

IEEE Transactions on Magnetics ◽

10.1109/20.764886 ◽

1999 ◽

Vol 35 (3) ◽

pp. 1924-1931 ◽

Cited By ~ 9

Author(s):

Daming Zhang ◽

Chek Fok Foo

Keyword(s):

Magnetic Field ◽

Theoretical Analysis ◽

Cross Section ◽

Circular Cross Section ◽

Field Distributions

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Muon-neutrino-induced charged-current cross section without pions: Theoretical analysis

Physical Review C ◽

10.1103/physrevc.97.045501 ◽

2018 ◽

Vol 97 (4) ◽

Cited By ~ 11

Author(s):

U. Mosel ◽

K. Gallmeister

Keyword(s):

Theoretical Analysis ◽

Cross Section ◽

Muon Neutrino ◽

Charged Current

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Estimation of Ultimate Longitudinal Bending Moment of Ships and Box Girders

Journal of Ship Research ◽

10.5957/jsr.1996.40.3.244 ◽

1996 ◽

Vol 40 (03) ◽

pp. 244-257 ◽

Cited By ~ 1

Author(s):

M. K. Rahman ◽

M. Chowdhury

Keyword(s):

Cross Section ◽

Bending Moment ◽

Fortran Program ◽

Box Girders ◽

Limit States ◽

Box Girder ◽

Stiffened Panels ◽

Complete Procedure ◽

Longitudinal Bending ◽

Collapse Behavior

The paper describes a methodology of computing the ultimate value of the longitudinal bending moment at any cross section of a ship or box girder. The cross section has been discretized into stiffened panels (one stiffener with its associated effective plating). The limit states for these panels, both tensile and compressive, are modeled in an appropriate manner. Since the ultimate strength of the girder section is largely governed by the behavior of the panels under compression, the authors have paid special attention in modeling the collapse as well as post-collapse behavior of these panels. A new stress-strain relationship is also introduced. The complete procedure has been coded into a FORTRAN program and tested against a number of box girder models and an actual ship for which the true behavior was known. The results obtained from the proposed program appear to be quite satisfactory. Good correlation was also found when compared with the results obtained by more complex and rigorous analytical methods.

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