caa a22 4500 388022760 CHVBK 20180307124929.0 cr unu---uuuuu 161130e199805 xx s 000 0 eng 10.1557/JMR.1998.0172 doi S0884291400044083 pii (NATIONALLICENCE)cambridge-10.1557/JMR.1998.0172 Pore geometry in woven fiber structures: 0°/90° plain-weave cloth layup preform [Elektronische Daten] Composite preform fiber architectures range from the very simple to the complex, and the extremes are typified by parallel continuous fibers and complicated three-dimensional woven structures. Subsequent processing of these preforms to produce dense composites may depend critically on the geometry of the interfiber porosity. The goal of this study is to fully characterize the structure of a 0°/90° cloth layup preform using x-ray tomographic microscopy (XTM). This characterization includes the measurement of intercloth channel widths and their variability, the transverse distribution of through-cloth holes, and the distribution of preform porosity. The structure of the intercloth porosity depends critically on the magnitude and direction of the offset between adjacent cloth layers. The structures observed include two-dimensional networks of open pipes linking adjacent holes, arrays of parallel one-dimensional pipes linking holes, and relatively closed channels exhibiting little structure, and these different structures would appear to offer very different resistances to gas flow through the preform. These measurements, and future measurements for different fiber architectures, will yield improved understanding of the role of preform structure on processing. Copyright © Materials Research Society 1998 Lee S-B Republic of Korea Army Headquarters, Chungnam, Nonsan, Duma Namson, Republic of Korea Stock S. R. School of Materials Science and Engineering, Georgia Institute of Technology, Atlanta, Georgia 30332-0245 Butts M. D. Chicago Bridge and Iron, Chicago, Illinois Starr T. L. School of Materials Science and Engineering, Georgia Institute of Technology, Atlanta, Georgia 30332-0245 Breunig T. M. Department of Restorative Dentistry, University of California, San Francisco, California 94143-0758 Kinney J. H. Chemistry and Materials Science Department, Lawrence Livermore National Laboratory, Livermore, California 94550 Journal of Materials Research Cambridge University Press 13/5(1998-05), 1209-1217 0884-2914 13:5<1209 1998 13 JMR https://doi.org/10.1557/JMR.1998.0172 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1557/JMR.1998.0172 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Lee S-B Republic of Korea Army Headquarters, Chungnam, Nonsan, Duma Namson, Republic of Korea NATIONALLICENCE 700 1- Stock S. R. School of Materials Science and Engineering, Georgia Institute of Technology, Atlanta, Georgia 30332-0245 NATIONALLICENCE 700 1- Butts M. D. Chicago Bridge and Iron, Chicago, Illinois NATIONALLICENCE 700 1- Starr T. L. School of Materials Science and Engineering, Georgia Institute of Technology, Atlanta, Georgia 30332-0245 NATIONALLICENCE 700 1- Breunig T. M. Department of Restorative Dentistry, University of California, San Francisco, California 94143-0758 NATIONALLICENCE 700 1- Kinney J. H. Chemistry and Materials Science Department, Lawrence Livermore National Laboratory, Livermore, California 94550 NATIONALLICENCE 773 0- Journal of Materials Research Cambridge University Press 13/5(1998-05), 1209-1217 0884-2914 13:5<1209 1998 13 JMR CC0 http://creativecommons.org/publicdomain/zero/1.0 nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-cambridge