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Item type:Publication, Access status: with files , True strength of ceramic fiber bundles : experiments and simulations(Multidisciplinary Digital Publishing Institute (MDPI), 2021-01-01); ; ; ; A study on the strength of ceramic fiber bundles based on experimental and computational procedures is presented. Tests were performed on single filaments and bundles composed of two fibers with different nominal fiber counts. A method based on fiber rupture signals was developed to estimate the amount of filament rupture during the test. Through this method, the fiber bundle true strength was determined and its variation with the initial fiber count observed. By using different load-sharing models and the single filament data as input parameter, simulations were also developed to verify this behavior. Through different approaches between experiments and simulations, it was noted that the fiber bundle true strength increased with the fiber count. Moreover, a variation of the fibers’ final proportion in the bundles relative to the initial amount was verified in both approaches. Finally, discussions on the influence of different load-sharing models on the results are presented.Publicationtype: Journal ArticleScopus© Citations 1 168 466 - Some of the metrics are blocked by yourconsent settings
Item type:Publication, Access status: without files , Mechanical tests and simulation on load sharing in alumina fiber bundles(Elsevier, 2015-07-26); ; ; ; The mechanical behavior of bundles of ceramic fibers exhibits a characteristic rupture process when subjected to tensile known as avalanche failure. This process is related to the load sharing among fiber bundles once some of the elements begin to fail. Mechanical tests were performed with bundles and Weibull statistics was used to interpret the results of the maximum stress supported by the bundles before the avalanche failure. A computational simulation was originally adapted introducing load sharing models. The simulations were compared with experimental results. Finally, the newly proposed load model was considered to be a better approach for the understanding of the rupture avalanche effect.Publicationtype: Journal Article34