scholarly journals Oxidation Induced Stress-Rupture of Fiber Bundles

1997 ◽  
Author(s):  
Edgar Lara-Curzio
Keyword(s):  
Fiber Bundle ◽  
Fiber Strength ◽  
Stress Rupture ◽  
Gauge Length ◽  
Fiber Bundles ◽  
Thermal Dependence ◽  
Induced Stress ◽  
Loss Of Strength ◽  
Special Case ◽  
Rupture Behavior

The effect of oxidation on the stress-rupture behavior of fiber bundles was modeled. It is shown that oxidation-induced fiber strength degradation results in the delayed failure of the associated fiber bundle and that the fiber bundle strength decreases with time as t−1/4. It is also shown that the temperature dependence of the bundle loss of strength reflects the thermal dependence of the mechanism controlling the oxidation of the fibers. The effect of gauge length on the fiber bundle strength was also analyzed. Numerical examples are presented for the special case of Nicalon™ fibers.

scholarly journals Oxidation Induced Stress-Rupture of Fiber Bundles

1998 ◽  
Vol 120 (2) ◽  
pp. 105-109 ◽  
Author(s):  
Edgar Lara-Curzio
Keyword(s):  
Fiber Bundle ◽  
Fiber Strength ◽  
Stress Rupture ◽  
Gauge Length ◽  
Fiber Bundles ◽  
Thermal Dependence ◽  
Induced Stress ◽  
Loss Of Strength ◽  
Special Case ◽  
Rupture Behavior

The effect of oxidation on the stress-rupture behavior of fiber bundles was modeled. It is shown that oxidation-induced fiber strength degradation results in the delayed failure of the associated fiber bundle and that the fiber bundle strength decreases with time as t-1/4. It is also shown that the temperature dependence of the bundle loss of strength reflects the thermal dependence of the mechanism controlling the oxidation of the fibers. The effect of gauge length on the fiber bundle strength was also analyzed. Numerical examples are presented for the special case of Nicalon™ fibers.

Influence of type and morphology of carbides on stress-rupture behavior of a cast cobalt-base superalloy

2017 ◽  
Vol 728 ◽  
pp. 145-151 ◽  
Author(s):  
Weimin Gui ◽  
Hongyu Zhang ◽  
Min Yang ◽  
Tao Jin ◽  
Xiaofeng Sun ◽  
...  
Keyword(s):  
Stress Rupture ◽  
Cobalt Base ◽  
Base Superalloy ◽  
Rupture Behavior

scholarly journals Number of fiber bundles in the fetal anterior talofibular ligament

2021 ◽  
Author(s):  
Mutsuaki Edama ◽  
Tomoya Takabayashi ◽  
Hirotake Yokota ◽  
Ryo Hirabayashi ◽  
Chie Sekine ◽  
...  
Keyword(s):  
Fiber Bundle ◽  
Fiber Bundles ◽  
Anterior Talofibular Ligament ◽  
Type I ◽  
Type Ii ◽  
Crown Rump Length ◽  
Type Iii ◽  
The Difference ◽  
And Inversion

Abstract Background For the anterior talofibular ligament (ATFL), a three-fiber bundle has recently been suggested to be weaker than a single or double fiber bundle in terms of ankle plantarflexion and inversion braking function. However, the studies leading to those results all used elderly specimens. Whether the difference in fiber bundles is a congenital or an acquired morphology is important when considering methods to prevent ATFL damage. The purpose of this study was to classify the number of fiber bundles in the ATFL of fetuses. Methods This study was conducted using 30 legs from 15 Japanese fetuses (mean weight, 1764.6 ± 616.9 g; mean crown-rump length, 283.5 ± 38.7 mm; 8 males, 7 females). The ATFL was then classified by the number of fiber bundles: Type I, one fiber bundle; Type II, two fiber bundles; and Type III, three fiber bundles. Results Ligament type was Type I in 5 legs (16.7%), Type II in 21 legs (70%), and Type III in 4 legs (13.3%). Conclusions The present results suggest that the three fiber bundles of the structure of the ATFL may be an innate structure.

An Attempt to Quantify the Translation of Fiber Bundle Tenacity into Yarn Tenacity

1976 ◽  
Vol 46 (11) ◽  
pp. 822-827 ◽  
Author(s):  
P. Neelakantan ◽  
T. A. Subramanian
Keyword(s):  
Fiber Bundle ◽  
Breaking Load ◽  
Gauge Length ◽  
Length Effect ◽  
The Real ◽  
Yarn Tenacity

The concept of a real yarn tenacity, derived by making an allowance for fiber obliquity and for the fibers that do not contribute to the yarn breaking load, has been postulated. An equation has been derived to enable the calculation of real yarn tenacity. In the case of man-made fibers that exhibit only a very weak gauge-length effect in their bundle tenacity, the real yarn tenacity has been shown to be equal to the fiber bundle tenacity at all levels of twist beyond the minimum required to ensure an interlocking structure. In the case of cotton, the effective gauge length for which the bundle tenacity is equal to the real yarn tenacity has been found to depend upon the level of twist in the yarn, being of the order of 1 mm for yarns that have more than the optimum twist.

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