Results 191 to 200 of about 175,988 (236)
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Journal of Applied Mechanics, Transactions ASME, 2016
In this work, the compressive buckling of a nanowire partially bonded to an elastomeric substrate is studied via finite-element method (FEM) simulations and experiments. The buckling profile of the nanowire can be divided into three regimes, i.e., the in-plane buckling, the disordered buckling in the out-of-plane direction, and the helical buckling ...
Yong Zhu, Xi Chen, Youlong Chen
exaly +2 more sources
In this work, the compressive buckling of a nanowire partially bonded to an elastomeric substrate is studied via finite-element method (FEM) simulations and experiments. The buckling profile of the nanowire can be divided into three regimes, i.e., the in-plane buckling, the disordered buckling in the out-of-plane direction, and the helical buckling ...
Yong Zhu, Xi Chen, Youlong Chen
exaly +2 more sources
Helical buckling of a thin rod with connectors constrained in a cylinder
International Journal of Mechanical Sciences, 2014Abstract Kinds of tubular columns with connectors are widely used in petroleum exploration and development field. In previous research, tubular columns are usually treated as homogeneous thin elastic rods constrained in a cylinder and little attention has been paid to the effect of connectors.
Wenjun Huang
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Helical buckling of a thin rod with connectors constrained in a torus
International Journal of Mechanical Sciences, 2015Abstract Kinds of tubular strings are widely applied to oil exploration & development. In the preceding studies, theses tubular strings are usually taken as homogeneous thin rods without connectors constrained in a straight cylinder or torus. Recent studies have indicated that the effect of connectors on the tubular strings is ignorable. On the basis
Wenjun Huang, Deli Gao
exaly +2 more sources
Helical Buckling of Pipe with Connectors and Torque
Proceedings of IADC/SPE Drilling Conference, 2004Abstract It has been generally recognized that connectors should have some effect on the buckling of pipe. For instance, the connector outside diameter may be as much as 50% greater than the pipe body diameter. As a result, the radial clearance of the connector can be substantially smaller than the radial clearance of the pipe body.
Robert F. Mitchell, Stefan Miska
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Buckling transition in long α-helices
The Journal of Chemical Physics, 2014The treatment of bending and buckling of stiff biopolymer filaments by the popular worm-like chain model does not provide adequate understanding of these processes at the microscopic level. Thus, we have used the atomistic molecular-dynamic simulations and the Amber03 force field to examine the compression buckling of α-helix (AH) filaments at room ...
Peter, Palenčár, Tomáš, Bleha
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Prediction of Helical / Sinusoidal Buckling
SPE/IADC Asia Pacific Drilling Technology, 1996Abstract A set of equations for helical and sinusoidal buckling under an ideal condition, where weight and frictional effects are not considered have been derived based on experimental and FEA data. An experimental method was developed canceling out frictional effects and FEA was carried out independently on both ...
H. Hishida +3 more
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On the buckling of helical compression springs
International Journal of Mechanical Sciences, 1992zbMATH Open Web Interface contents unavailable due to conflicting licenses.
Becker, L. E., Cleghorn, W. L.
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SPE Drilling Engineering, 1988
Summary A new solution to helical buckling is presented yielding real helical shapes of buckled pipes with a varying helix pitch. This solution has been developed with the beam/column equation. The change in length and the bending stress can be computed from the helical-buckling solution. In addition, a new equation for tool clearance in
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Summary A new solution to helical buckling is presented yielding real helical shapes of buckled pipes with a varying helix pitch. This solution has been developed with the beam/column equation. The change in length and the bending stress can be computed from the helical-buckling solution. In addition, a new equation for tool clearance in
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Helical Buckling of Pipes in Extended Reach and Horizontal Wells—Part 1: Preventing Helical Buckling
Journal of Energy Resources Technology, 1993Abstract This paper studies the helical buckling of pipes (drillstring and tubing) in extended reach and horizontal wells, theoretically and experimentally, resulting in new equations to correctly predict and effectively prevent the helical buckling of pipes in such wells.
J. Wu, H. C. Juvkam-Wold, R. Lu
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On Lateral and Helical Buckling of a Rod in a Tubing
Journal of Canadian Petroleum Technology, 2006Abstract The paper analyzes lateral and helical buckling of a rod sub-merged in fluid in tubing. The purpose of the paper is to revisit the controversy regarding the formula for the helical buckling load that still exists in the literature. The relation between the critical helical buckling force and the helix-pitch
S.A. Lukasiewicz, C. Knight
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