Fiber Structures of Special 4 3 1 Warped like Manifolds with Spin 7 holonomy

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2014-06-13

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Ünal, İbrahim

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https://hdl.handle.net/11511/74644

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Fiber structures of special (4+3+1) warped-like manifolds with Spin(7) holonomy UĞUZ, SELMAN; Ünal, İbrahim (World Scientific Pub Co Pte Lt, 2014-09-01) L generalization of 8-dimensional multiply-warped product manifolds is considered as a special warped product, by allowing the fiber metric to be non-block diagonal. Motivating from the previous paper [S. Uguz and A. H. Bilge, (3 + 3 + 2) warped-like product manifolds with Spin(7) holonomy, J. Geom. Phys. 61 (2011) 1093-1103], we present a special warped product as a (4 + 3 + 1) warped-like manifold of the form M = F x B, where the base B is a 1-dimensional Riemannian manifold, and the fiber F is of the for...
Fiber/matrix interface stress analysis of flax-fiber composites under transverse loading considering material nonlinearity SABUNCUOĞLU, BARIŞ; Cakmakci, Onur; Kadıoğlu, Fevzi Suat (SAGE Publications, 2020-05-01) Distribution of stresses in fiber/matrix interface in UD flax fiber reinforced composites is investigated under transverse loading and compared with conventional synthetic fibers. Micro-scale finite element models with representative volume elements are generated with various fiber packing types and fiber volume ratios. The study is performed for various strain values, which take into account the material nonlinearity of matrix. The results show that significantly lower stress concentrations exist in the ca...
Fiber loop ring down spectroscopy for trace chemical detection Cengiz, Betül; Danışman, Mehmet Fatih; Esentürk, Okan; Department of Chemistry (2013) Fiber loop ring down (FLRD) spectroscopy is a sensitive spectroscopic technique that is based on absorption and it is convenient for trace chemical detection. Different FLRD systems are being improved in order to increase their sensitivity. In FLRD spectroscopy, detection of a sample is done by measuring of a leaking light at each trip within an optical cavity. Intensity of leaking light has an exponential decay where it is reduced by absorption of sample and scattering of light. In this project, two FLRD s...
FIBER BRAGG GRATING SENSOR APPLICATIONS FOR STRUCTURAL HEALTH MONITORING Karataş, Cansu; Değerliyurt, Boray; Yaman, Yavuz; Şahin, Melin (2017-09-30) A well-known structural health monitoring method used to detect and locate damage in civil engineering structures is vibration-based damage identification. It typically monitors the civil structure over time to spot slow or sudden changes in its natural frequencies, damping factors or modal displacements. This approach can prove very powerful, but the sensitivity of those properties to local damage can be rather low. In addition, their cross-sensitivity to environmental influences may completely mask the ef...
Fibers of thermoplastic polymer blends activate multiple interlayer toughening mechanisms Kılıçoğlu, Melike; Bat, Erhan; Gündüz, Güngör; YILDIRIM, MUSTAFA UTKU; URGUN, KAMİL; MAVİŞ, BORA (2022-07-01) © 2022 Elsevier LtdInterleaving fiber reinforced layered composites with thermoplastic veils is a strategy that has been examined by using electrospun fibers of homopolymers as well as their physical mixtures. Separate toughening mechanisms were activated by the individual presence of the physically mixed fibers in previous studies. Here, we show that it is possible to initiate a concerted action of these mechanisms by interleaving electrospun fiber veils based on blends of PCL and PA6 (80/20, 60/40 and 40/...

Citation Formats

İ. Ünal, “Fiber Structures of Special 4 3 1 Warped like Manifolds with Spin 7 holonomy,” 2014, Accessed: 00, 2021. [Online]. Available: https://hdl.handle.net/11511/74644.