@article{davis_singletary_srinivasarao_knoff_ramasubramanian_2000, title={Microstructure organization in para-aramid fibers}, volume={70}, ISSN={["0040-5175"]}, DOI={10.1177/004051750007001102}, abstractNote={ The existence of "lateral birefringence," i.e., the difference between the refractive index for light polarized parallel to the fiber radius and light polarized perpendicular to the radius in the cross-sectional plane, combined with the existence of electron diffraction contrast "bands" in longitudinal fiber sections has led to work appearing to indicate that para-aramid fibers, in particular poly(para-phenylene terephthalamide), have an almost crystallographically perfect orthotropic structure in which the hydrogen bonds are all parallel to fiber radii. Optical path difference profiles, calculated based on the proposed orthotropic structure, are in reasonable qualitative agreement with interference microscope data. Quantitatively, however, the orthotropic structure is only partially developed based on published values of the principle refractive indices. Furthermore, the degree to which this structure is developed varies with distance from the fiber axis in some fibers' types. }, number={11}, journal={TEXTILE RESEARCH JOURNAL}, author={Davis, H and Singletary, J and Srinivasarao, M and Knoff, W and Ramasubramanian, MK}, year={2000}, month={Nov}, pages={945–950} }
 @article{batra_chidambaram_davis_2000, title={Strength loss in thermally bonded polypropylene fibers}, volume={9}, number={3}, journal={International Nonwovens Journal}, author={Batra, S. K. and Chidambaram, A. and Davis, H. A.}, year={2000}, pages={27–35} }
 @article{singletary_davis_ramasubramanian_knoff_toney_2000, title={The transverse compression of PPTA fibers - Part I - Single fiber transverse compression testing}, volume={35}, ISSN={["0022-2461"]}, DOI={10.1023/A:1004764024568}, number={3}, journal={JOURNAL OF MATERIALS SCIENCE}, author={Singletary, J and Davis, H and Ramasubramanian, MK and Knoff, W and Toney, M}, year={2000}, month={Feb}, pages={573–581} }
 @article{singletary_davis_song_ramasubramanian_knoff_2000, title={The transverse compression of PPTA fibers - Part II - Fiber transverse structure}, volume={35}, ISSN={["1573-4803"]}, DOI={10.1023/A:1004716108638}, number={3}, journal={JOURNAL OF MATERIALS SCIENCE}, author={Singletary, J and Davis, H and Song, Y and Ramasubramanian, MK and Knoff, W}, year={2000}, month={Feb}, pages={583–592} }
 @article{dharmadhikary_davis_gilmore_batra_1999, title={Influence of fiber structure on properties of thermally point bonded polypropylene nonwovens}, volume={69}, ISSN={["0040-5175"]}, DOI={10.1177/004051759906901005}, abstractNote={Carded webs with a basis weight of 30 g/m2are prepared from Hercules T-196 and Hercules T-101 polypropylene fibers, then thermally point bonded with "Novonette" rolls at various temperatures and pressures. A subset of samples is studied in relative detail using various methods. In particular, the distribution of bridging fiber strengths after bonding is measured directly. Bonding at higher temperatures reduces single fiber strength and increases its variability while increasing the effectiveness (strength) of the bonds. These competing effects appear to explain the maximum fabric-strength-versus-bonding temperature relationship. Bonding performance differences between these two fibers appear to depend on the fact that nonfailing bonds can be produced at lower temperatures in the T-196, where fiber strength degradation is less, and possibly to a lesser extent on the higher elongation and concave-down curvature of the stress-strain relationship.}, number={10}, journal={TEXTILE RESEARCH JOURNAL}, author={Dharmadhikary, RK and Davis, H and Gilmore, TF and Batra, SK}, year={1999}, month={Oct}, pages={725–734} }
 @article{pourdeyhimi_dent_davis_1997, title={Measuring fiber orientation in nonwovens .3. Fourier transform}, volume={67}, ISSN={["0040-5175"]}, DOI={10.1177/004051759706700211}, abstractNote={ This paper addresses the development of an image analysis technique using the Fourier transform of the image to evaluate orientation in a fibrous assembly. The algorithms are evaluated using simulated images presented in Part I of the series. The results are compared with those for the tracking method presented in Part II. }, number={2}, journal={TEXTILE RESEARCH JOURNAL}, author={Pourdeyhimi, B and Dent, R and Davis, H}, year={1997}, month={Feb}, pages={143–151} }
 @article{veerabadran_davis_batra_bullerwell_1996, title={Devices for on-line assessment of nonwovens' basis weights and structures}, volume={66}, ISSN={["0040-5175"]}, DOI={10.1177/004051759606600412}, abstractNote={ Two devices for quantifying the basis weight and fiber orientation distribution func tion in nonwoven webs have been developed and studied. The basis weight device measures the attenuation of a light beam by the fabric. The particular device is im plemented, calibrated, and tested at speeds up to 400 m/min. By statistical analysis, this device is accurate enough to use with fabrics that are three or more times less variable than current commercial nonwovens. The device for quantifying web structure measures the orientation distribution function of a static sample by light scattering, and it is sensitive enough to detect subtle differences in spunbonded webs produced with different filament-dispersing hardware. An anisotropy ratio calculated from mea sured orientation distribution functions correlates well with fabric tensile properties. }, number={4}, journal={TEXTILE RESEARCH JOURNAL}, author={Veerabadran, R and Davis, HA and Batra, SK and Bullerwell, AC}, year={1996}, month={Apr}, pages={257–264} }