Periodic Micro-necking of Polyester Filament

Investigation of fatigue behavior of polyester filament woven fabrics under cyclic loading

A D-periodic narrow filament in collagen.

Collagen may be reprecipitated as obliquely striated fibrils. The oblique striations are due to D-periodic subfibrils staggered axially by approxi­ mately 9.0 nm with respect to their neighbours (Bruns, Trelstad & Gross 1973). The diameter of the subfibrils is variable. Optical diffraction analysis of the electron micrographs reveals instances of subfibrils with the D-repeat having diameter 3.7...

Tectonic Resurfacing of Icy Satellites by Periodic Necking Instabilities: Application to Ganymede and Enceladus

Overview: Many of the icy satellites in our solar system include young, highly tectonized terrains. Two of the most prominent examples of such surfaces are Ganymede's grooved terrain and Enceladus' south polar tiger stripes, both of which appear to have ages of less than 1 Ga [1, 2]. While cryovolcanism likely has occurred and is occurring on these bodies, the lack of obvious cryovolcanic struc...

An Optical Method for Measuring the Diameter in Real Time of Polyester Filament

An optical method has been proposed and its system has been developed for measuring the change in diameter during the production of polyester filament in a manufacturing plant. The principle of the method is based on the application of scattered light on the filament. The sensor head of the system consisted of a semiconductor laser, two silicon-photodiodes as a light receiver, and a cylindrical...

Localized Necking in Thin Sheets

SIJMMARY BY USING a simplified constitutive model of a pointed vertex on subsequent yield loci, namely, such that the equations of deformation-theory of rigid-plastic solids apply for fully-active stress increments, the onset of localized necking under biaxial stretching has been predicted. The predictions agree reasonably well with reported experimental observations. Since localized necking un...