Purpose: To quantify the force of elastic tubes at different elongation patterns used in exercises.
Methods: A tensile test of elastic tubes which had seven levels of resistance identified by colors was performed. All samples (n = 105; 15 samples for each color) were 7 cm of length and had two interfaces for fixation. The samples were tested in a tensile testing hydraulic machine, under elongation control, up to 200% of the original length (21 cm). The force values corresponding to an increase of 50%, 100%, 150% and 200% of the samples initial length were recorded.
Results: A strong linear association between force and elongation for all colors was found. There were different forces for each elongation investigated for the same tube and between different tubes in almost all percentage of elongation investigated, except for the red and green tubes (all elongations), and for the blue and black tubes at 50% elongation.
Conclusion: Mechanical tests revealed different elastic forces for different levels of elongation of each tube. The replication of the results in clinical situations is recommended, so the elastic resistance in clinical routine could be evaluated with more propriety.
Download full-text PDF |
Source |
|---|---|
| http://dx.doi.org/10.3109/09593985.2013.845806 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
Design, analysis, and demonstration of the COAST guidewire robot with middle tube rotation for endovascular interventions.
Sci Rep
November 2024
Medical Robotics and Automation (RoboMed) Laboratory, Wallace H. Coulter Department of Biomedical Engineering, Georgia Institute of Technology, Atlanta, GA, 30332, USA.
Minimally invasive procedures for endovascular interventions involve manual navigation of a guidewire. Endovascular interventions encompassing highly tortuous vessels would benefit from guidewires which exhibit higher dexterity. This paper introduces a version of the COAST (COaxially Aligned STeerable) guidewire system capable of exhibiting higher dexterity.
View Article and Find Full Text PDFStudy on eccentric compressive performance of circular double skin concrete filled steel tube connected by thread through inside lining tube.
Sci Rep
November 2024
School of Civil Engineering, University of Science and Technology Liaoning, No. 189 Qianshan Middle Road, Lishan District, Anshan City, 114051, Liaoning Province, People's Republic of China.
Connection method of lengthening the steel tube of circular hollow sandwich concrete-filled steel tube by inside lining tube and thread is proposed. Twelve circular hollow sandwich concrete filled steel tubular beam-column connected by thread through inside lining tube are designed and fabricated using the length of the thread along the axial direction, the working height of the thread, and the position of the thread as parameters; In addition, one unconnected specimen and two welded specimens also are designed and fabricated to conduct controlled experimental research. The test phenomena and failure modes, axial compressive load-compression curve, axial compressive load-lateral deflection curve, and axial compressive load-strain in steel tube curve, as well as bearing capacity, strength reservation, deflection curve shape, lateral stiffness, ductility and plane section assumption are analyzed.
View Article and Find Full Text PDFSimulating irregular symmetry breaking in gut cross sections using a novel energy-optimization approach in growth-elasticity.
J Theor Biol
December 2024
Department of Mathematical Sciences, Worcester Polytechnic Institute, United States of America; Center for Computational Biology, Flatiron Institute, United States of America. Electronic address:
Growth-elasticity (also known as morphoelasticity) is a powerful model framework for understanding complex shape development in soft biological tissues. At each instant, by mapping how continuum building blocks have grown geometrically and how they respond elastically to the push-and-pull from their neighbors, the shape of the growing structure is determined from a state of mechanical equilibrium. As mechanical loads continue to be added to the system through growth, many interesting shapes, such as smooth wavy wrinkles, sharp creases, and deep folds, can form on the tissue surface from a relatively flatter geometry.
View Article and Find Full Text PDFViologen-based supramolecular crystal gels: gelation kinetics and sensitivity to temperature.
Soft Matter
October 2024
ENS de Lyon, CNRS, Laboratoire de Physique, UMR 5672, F-69342 Lyon, France.
Article Synopsis
- - The study investigates viologen-based supramolecular crystal gels, which are soft solid networks formed by the self-assembly of low molecular weight gelators into crystalline fibers, focusing on how to tune their properties.
- - Researchers conducted various experiments, including spectroscopy and microscopy, to analyze the gelation process and found that viologen gelators crystallize into hollow tubes that combine into larger spherulites, following the Avrami theory of crystallization.
- - The findings suggest that adjusting the quenching temperature impacts the size and density of spherulites but does not significantly change the gel's elasticity, indicating a trade-off between spherulite density and connectivity.
Tunable wave coupling in periodically rotated Miura-ori tubes.
Philos Trans A Math Phys Eng Sci
October 2024
Department of General Systems Studies, Graduate School of Arts and Sciences, The University of Tokyo, 3-8-1 Komaba, Meguro-Ku, Meguro-Ku,Tokyo, Japan.
Origami folding structures are vital in shaping programmable mechanical material properties. Of particular note, tunable dynamical properties of elastic wave propagation in origami structures have been reported. Despite the promising features of origami metamaterials, the influence of the kinematics of tessellated origami structures on elastic wave propagation remain unexplored.
View Article and Find Full Text PDFWant AI Summaries of new PubMed Abstracts delivered to your In-box?
Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!