Scalable measurements of tow architecture variability in braided ceramic composite tubes

Heim, Frederick M.; Croom, Brendan P.; Bumgardner, Clifton; Li, Xiaodong

doi:10.1111/jace.15564

Scalable measurements of tow architecture variability in braided ceramic composite tubes

Journal Article · Fri Apr 06 00:00:00 EDT 2018 · Journal of the American Ceramic Society

DOI:https://doi.org/10.1111/jace.15564· OSTI ID:1432136

^[1]; ^[1]; Bumgardner, Clifton ^[1]; Li, Xiaodong ^[1]

Department of Mechanical and Aerospace Engineering University of Virginia Charlottesville Virginia

Abstract

The performance of braided ceramic matrix composites has been shown to depend on the spatial arrangement of tows; therefore, a new class of tools is required to measure irregularities in the composite architecture for components with intricate geometries. We report a scalable and robust reconstruction technique built upon stereoscopic digital image correlation that is able to efficiently measure the position of tows in arbitrarily shaped composites. This method was applied to triaxially braided ceramic matrix composite tubes intended for use as nuclear fuel cladding, which revealed both long‐range “systematic” tow packing defects associated with the manufacturing process and short‐range “intrinsic” defects due to the braid architecture. These findings suggested that the character of tow spacing variation in braided composite tubes was substantially more complex than in planar woven composites. These measurements are expected to lead to improved processing of braided composites and to facilitate the design of statistically representative virtual specimens for finite element modeling.

View Accepted Manuscript (Publisher)

Sponsoring Organization:: USDOE

OSTI ID:: 1432136

Journal Information:: Journal of the American Ceramic Society, Journal Name: Journal of the American Ceramic Society Journal Issue: 9 Vol. 101; ISSN 0002-7820

Publisher:: Wiley-BlackwellCopyright Statement

Country of Publication:: United States

Language:: English

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