A probabilistic approach on residual strength and damage buildup of high-performance fibers

Henk Knoester*, Joost Hulshof, Ronald Meester

*Corresponding author for this work

Research output: Contribution to JournalArticleAcademicpeer-review

Abstract

An elementary, probabilistic model for fiber failure, developed by Coleman in the fifties of the last century, predicts a Weibull distributed time-to-failure for fibers subject to a constant load. This has been experimentally confirmed, not only for fibers but for load-bearing products in general. In this paper, we analyze residual strength, i.e., the strength after having survived a given load program. We demonstrate that the Weibull modulus, describing variability of time-to-failure, affects residual strength. It determines (a) how fast residual strength of fibers decays during their service life, (b) the residual strength variability, and (c) the fraction of surviving fibers during service life. Experiments show that residual strength of Twaron fiber (p-aramid fiber), exceeding predictions of Coleman’s model, remains unrelentingly high (close to virgin strength) during service life.

Original languageEnglish
Pages (from-to)1898-1910
Number of pages13
JournalJournal of Materials Science
Volume52
Issue number4
DOIs
Publication statusPublished - 1 Feb 2017

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