The Effects of Boundary Conditions and Friction on the Helical Buckling of Coiled Tubing in an Inclined Wellbore. [PDF]
PLoS ONE, 2016 Analytical buckling models are important for down-hole operations to ensure the structural integrity of the drill string. A literature survey shows that most published analytical buckling models do not address the effects of inclination angle, boundary ...
Yinchun Gong +3 more
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Helical Buckling of Drill-Strings [PDF]
MATEC Web of Conferences, 2018 This paper presents experimental and numerical investigations of the complex drill-string vibration, with particular attention to the helical buckling of drill-strings and its influence on the system dynamics.
Kapitaniak Marcin +2 more
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Computational simulations of the helical buckling behavior of blood vessels. [PDF]
Int J Numer Method Biomed Eng, 2019 AbstractTortuous vessels are often observed in vivo and could hinder or even disrupt blood flow to distal organs. Besides genetic and biological factors, the in vivo mechanical loading seems to play a role in the formation of tortuous vessels, but the mechanism for formation of helical vessel shape remains unclear.
Sharzehee M, Fatemifar F, Han HC.
europepmc +4 more sources
Helical buckling of actin inside filopodia generates traction. [PDF]
Proc Natl Acad Sci U S A, 2015 Significance Filopodia are essential membrane protrusions that facilitate cellular sensing and interaction with the environment. The mechanical properties of filopodia are crucial for their ability to push and pull on external objects and are attributed to actin dynamics.
Leijnse N, Oddershede LB, Bendix PM.
europepmc +5 more sources
Helical buckling of thin rods: FE modelling [PDF]
MATEC Web of Conferences, 2018 In this paper, we utilize the Finite Element (FE) method to model twisting of long thin rods and capture the bifurcation scenarios leading to heli- cal buckling and various further post-buckling states.
Kapitaniak Marcin +2 more
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Inter-helical and intra-helical buckling analyses of tubular strings with connectors in horizontal wellbores [PDF]
Journal of Petroleum Science and Engineering, 2017 Abstract Helical buckling of tubular strings with connectors is divided into two sub-problems: inter-helical buckling and intra-helical buckling. The suspended section of the tubular string is depicted by beam-column model and the continuous contact section is depicted by helix.
Wenjun Huang, Deli Gao, Yinghua Liu
exaly +2 more sources
Vine-Inspired Soft Robotics: Materials, Actuations, and Emerging Applications. [PDF]
Adv Sci (Weinh)Vine‐inspired robots grow from the tip, enabling navigation through confined spaces with minimal disturbance. This Review summarizes material and actuation strategies for vine‐inspired growth, key functions including steering, retraction, attachment, branching, and variable stiffness, and emerging applications spanning medical intervention, confined ...
Wu J +7 more
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Magnetically controlled microrobotic system for programmable stiffness tuning and active steering of microcatheters [PDF]
Nature CommunicationsSurgical tasks in small tortuous lumens demand interventional instruments with controllable mechanical adaptability. However, current microcatheters lack a non-disruptive, integration-ready strategy for dynamic stiffness tuning—critical for meeting the ...
Yuan Liu +7 more
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Liner Pressure Test Buckling Generation and Influences on Running String and Cement Quality of Previous Casing in Vertical Wells [PDF]
Journal of Chemical and Petroleum Engineering, 2023 Buckling occurrence during liner pressure test represents a challenge, in addition to running string deformation; previous casing cement quality may be severely affected.
Leksir Abdeslem
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Minimal Mass and Maximal Buckling Load of Composite Hexagonal-Triangle Grid Structure using FSDT under External Hydrostatic Pressure [PDF]
Mechanics of Advanced Composite Structures, 2023 Grid-stiffened composite shells are one of the most important structures in many industries. These structures based on their fabrication method, provide both high strength and light structural weight.
Mahsa Soheil Shamaee, Ahmad Reza Ghasemi
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