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Fiber Mechanical Reliability - Modeling 


A Fiber Bragg Grating Measurement System for Monitoring Optical Fiber Strain   
Abstract:
A practical method has been developed for handling optical fiber while simultaneously monitoring fiber stress. The sensing system employs the use of fiber Bragg gratings and is able to produce an accurate history of dynamic stresses in the optical fiber during processing, cabling, and installation events.

Advancements in Mechanical Strength and Reliability of Optical Fibers  
Abstract: This paper reviews recent advancements in the area of mechanical reliability of optical fiber, building upon previously published reviews in this area.

Extrinsic Strength Measurements and Associated Mechanical Reliability Modeling of Optical Fiber  
Abstract: Strength testing was performed on over 3,800 km of fiber to obtain a distribution for use in mechanical reliability predictions. With the proper strength distribution, a reliability model has been developed to predict failure probabilities for various stress events.

Incorporating multi-region crack growth into mechanical reliability predictions for optical fibres  
Abstract: Most mechanical reliability models for optical fiber assume the same crack growth parameters (n and B) for both proof testing and in-service life. However, these parameters vary depending on the relative speed of the event. This paper demonstrates a multi-region power law model that can predict reliability for both high-speed and low-speed stressing events.

Design methodology for the mechanical reliability of optical fiber  
Abstract: An engineering methodology for the mechanical reliability of optical fiber is developed within a fracture-mechanics framework.

High Speed Strength Testing of Optical Fiber  
Abstract: Optical fiber models for mechanical reliability require that the initial strength and crack growth parameters be measured. A high speed strength testing apparatus has been fabricated to measure these parameters for fast processing events such as proof testing, coloring and cabling.

Mechanical Reliability Predictions: An Attempt At Measuring The Initial Strength of Draw-Abraded Optical Fiber Using High Stressing Rates
Abstract:
Strength testing over eight decades in stressing rates was performed on draw-abraded silica-clad fiber. The strength was found to level off at stressing rates in the range of 200,000 kpsi/s (1400 GPa/s).

Modeling of Proof Test Level Flaws Using Cube Corner Indents  
Abstract: Proof test level flaws in lightguide fibers have been modeled using radial cracks in flat silica fibers. Using a cube corner indenter, strengths on the order of the proof test were obtained, with tight distributions (Weibull m ~ 30-70).

Optical Fiber Failure Probability Predictions from Long-Length Strength Distributions  
Abstract: Strength data from a recently developed apparatus for measuring long-length fiber strength distributions are analyzed in terms of proof test theory for truncated distributions.

The Mechanical Behavior of Large Flaws in Optical Fiber and Their Role In Reliability Predictions   
Abstract:
The flaws in optical fiber of greatest reliability risk are those below the high strength region. This paper examines fatigue and aging characteristics of these large flaws.

Fatigue behavior of silica fibers of different strength  
Abstract: Universal coordinates for static fatigue and dynamic fatigue data are presented. Usage of these coordinates helps to correctly compare the test results of different fibers regardless of the initial defect size.

Fatigue behavior of silica fibers with different defects  
Abstract: Comparison of high-speed strength data for weak (abraded, contaminated and indented) and pristine fibers was performed. The paper demonstrates that the fatigue behavior of abraded fiber is similar to the fatigue behavior of contaminated and indented fiber.

An Appraisal of Mechanical Reliability Predictions for Optical Fibers Based on Break Rates   
Abstract: This paper examines the use of proof test break rates in estimating lifetime for optical fiber.

Mechanical Behavior and B-Value of an Abraded Optical Fiber  
Abstract: The mechanical behavior and B-value of high strength and abraded (proof test level) optical fibers has been tested by joint experiments at nine laboratories.