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Inserting a rigid object into a soft elastic tube produces conformal contact between the two, resulting in contact lines. The curvature of the tube walls near these contact lines is often large and is typically regularized by the finite bending rigidity of the tube. Here, it is demonstrated using experiments and a Föppl-von Kármán-like theory that a second, independent, mechanism of curvature regularization occurs when the tube is axially stretched. In contrast with the effects of finite bending rigidity, the radius of curvature obtained increases with the applied stretching force and decreases with sheet thickness. The dependence of the curvature on a suitably rescaled stretching force is found to be universal, independent of the shape of the intruder, and results from an interplay between the longitudinal stresses due to the applied stretch and hoop stresses characteristic of curved geometry. These results suggest that curvature measurements can be used to infer the mechanical properties of stretched tubular structures.
This article was published in the following journal.
Name: Physical review letters
Stretching and shooting rubber bands is a familiar experience for both children and adults, yet the initial dynamics are so quick that they are generally missed. When a cut elastic strip is stretched ...
Gastrojejunostomy (GJ) tubes are frequently used to provide nutrition in patients who do not tolerate gastric feeding. Despite their widespread use, there is little literature on the lifespan of GJ tu...
We report a case of stretched scar syndrome in a 12-year-old girl with consecutive exotropia who had previously been treated with bilateral medial rectus muscle recessions. Stretched scar syndrome was...
This article provides a brief overview of the most common types of enteral feeding tubes, their placement and the problems that may be encountered in the care of patients with tubes in situ. It is imp...
Human observers are exquisitely sensitive to curvature deformations along a circular closed contour (Wilkinson, Wilson, & Habak, 1998; Hess, Wang, & Dakin, 1999; Loffler, Wilson, & Wilkinson, 2003). S...
This study will utilize ultrasound image texture variables to construct an elastic net regularized, logistic regression model to differentiate between healthy and Fibromyalgia patients. Th...
Single center investigator initiated sponsored by Guidant Boston Scientific Corp. to evaluate the benefit of ventricular rate regularization (VRR) in patients with congestive heart failure...
The purpose of this study is to monitor heart rate regularization in patients with permanent atrial fibrillation and standard indication for single chamber rate adaptive pacing VVI(R).
Penile curvature in adults is divided into two main categories the first is congenital penile curvature with orthotopic meatus and the other is acquired curvature which its common causes a...
This study will evaluate the hypothesis that the use of pediatric size phlebotomy tubes reduces RBC transfusions in adult ICU patients compared with the use of adult size tubes.
A type of CARTILAGE whose matrix contains ELASTIC FIBERS and elastic lamellae, in addition to the normal components of HYALINE CARTILAGE matrix. Elastic cartilage is found in the EXTERNAL EAR; EUSTACHIAN TUBE; EPIGLOTTIS; and LARYNX.
Connective tissue comprised chiefly of elastic fibers. Elastic fibers have two components: ELASTIN and MICROFIBRILS.
Continuous involuntary sustained muscle contraction which is often a manifestation of BASAL GANGLIA DISEASES. When an affected muscle is passively stretched, the degree of resistance remains constant regardless of the rate at which the muscle is stretched. This feature helps to distinguish rigidity from MUSCLE SPASTICITY. (From Adams et al., Principles of Neurology, 6th ed, p73)
Unequal curvature of the refractive surfaces of the eye. Thus a point source of light cannot be brought to a point focus on the retina but is spread over a more or less diffuse area. This results from the radius of curvature in one plane being longer or shorter than the radius at right angles to it. (Dorland, 27th ed)
The anterior concavity in the curvature of the lumbar and cervical spine as viewed from the side. The term usually refers to abnormally increased curvature (hollow back, saddle back, swayback). It does not include lordosis as normal mating posture in certain animals ( = POSTURE + SEX BEHAVIOR, ANIMAL).