Results 251 to 260 of about 83,513 (280)

Critical Buckling Pressure of Veins

ASME 2008 Summer Bioengineering Conference, Parts A and B, 2008
Vein tortuosity is often seen as a consequence of venous hypertension and chronic venous disease. However, the underlying mechanism of vein tortuosity is unclear. The aim of this study was to test the hypothesis that hypertensive pressure causes vein buckling that leads to tortuous veins. We determined the buckling pressure of porcine jugular veins and
Ricky Martinez, Cesar A. Fierro, Hai-Chao Han   +2 more
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The Critical Buckling Pressure of Arteries

ASME 2007 Summer Bioengineering Conference, 2007
Artery stability is essential to normal arterial functions. This study examined the critical internal pressure at which arteries buckle. The critical pressure was found to be strongly related to the axial strain in the arteries.
Cesar A. Fierro, Kurtis Johnson, Hai-Chao Han   +2 more
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Critical Buckling Loads for Tapered Columns

Transactions of the American Society of Civil Engineers, 1962
Formulas and graphs for determination of critical elastic buckling loads of uniformly tapered columns having wide flange section, box section, and other cross-sectional shapes are presented; columns with pinned ends, fixed-free ends, fixed-pinned ends, and fixed ends are considered; critical elastic buckling loads may be obtained directly from graphs ...
James M. Gere, Winfred O. Carter
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Buckling of a critically tapered rod: global bifurcation

Proceedings of the Royal Society of London. Series A: Mathematical, Physical and Engineering Sciences, 2003
The present paper, which can be considered as a continuation of the first author's previous papers [\textit{C. A. Stuart}, J. Math. Pures Appl., IX. Sér. 80, No. 3, 281--337 (2001; Zbl 1056.74019) and Proc. R. Soc. Edinb., Sect. A, Math. 132, No. 3, 729--764 (2002; Zbl 1020.34076)] is concerned with studying the buckling of a tapered rod. This physical
Stuart, C. A., Vuillaume, G.
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Critical Force in the Buckling of Drill Bits

Journal of Applied Mechanics, 1979
We consider a fourth-order nonlinear system of differential equations that describe the slope of a steadily rotating flexible rod, one end of which is clamped, and the other end of which is “hinged.” There is a force directed along the length of the rod.
Bobisud, L. E., Christenson, C. O.
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Critical upheaval buckling forces of imperfect pipelines

Applied Ocean Research, 2014
Abstract A buried pipeline may have upheaval buckling when it works in high temperature and high pressure (HT/HP) conditions. The upheaval buckling behavior is sensitive to initial structural imperfections. There have already been some approximation formulas of critical axial forces for some particular shape imperfections. However, these formulas did
Xiaguang Zeng, Menglan Duan, Xiaoyu Che
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Critical Local Buckling Conditions for Deepwater Pipelines

Volume 4: Terry Jones Pipeline Technology; Ocean Space Utilization; CFD and VIV Symposium, 2006
In many deepwater pipeline applications, a clear understanding of pipe local buckling behaviour due to excessive bending and/or external pressure is required to adequately design subsea pipeline systems to an acceptable degree of risk. With ultra-deepwater pipelines being considered for water depths of nearly 3000 m, pipe collapse, in many instances ...
J. Wolodko, D. DeGeer
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Lateral Distortional Buckling: Predicting Elastic Critical Stress

Journal of Structural Engineering, 1988
The problem of restrained lateral beam buckling is being treated in this paper. The restraint represents complete lateral and arbitrary continuous rotational restraint of one flange, the latter is represented by the spring stiffness \IC\N\d0. A simple theory, in which the problem is transformed into an ordinary fourth order differential eigenvalue ...
P. Goltermann, S. E. Svensson
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How Drillstring Rotation Affects Critical Buckling Load?

IADC/SPE Drilling Conference, 2008
Abstract Buckling of tubulars inside wellbores has been the subject of many researches and articles in the past. However, these conservative theories have always followed the same assumptions: the wellbore has a perfect and unrealistic geometry (vertical, horizontal, deviated, curved), the friction and rotation effects are ignored ...
S. Menand, H. Sellami, J. Akowanou, C. Simon, L. Macresy, P. Isambourg, D. Dupuis   +6 more
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Approximate Derivation of Critical Buckling Load

Journal of Architectural Engineering, 2009
This paper proposes an approximate derivation for the critical buckling load of a column, based on the application of a uniformly loaded beam's midspan moment and deflection to the buckled column's rotational equilibrium. The curvature of a pin-ended member, when it buckles under axial load, is similar to the curvature assumed by the same member when ...
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