0000000001314320
AUTHOR
M. Hauka
Experimental Characterization of the Properties of Double-Lap Needled and Hybrid Joints of Carbon/Epoxy Composites
The effect of through-thickness reinforcement by thin 1 mm steel needles (z-pins) on the static tensile strength of double-lap joints of a carbon/epoxy composite was investigated. Two types of joints—z-pinned and hybrid (including glued ones)—were considered. The joints were reinforced in the overlap region with 9, 25, or 36 z-pins. Comparing mechanical properties of the double-lap joints with the corresponding characteristics of their unpinned counterparts, the z-pins were found to be highly effective: the strength and stiffness of the pinned joints increased up to 300% and 280%, respectively. These improvements were due to a transition in the failure mechanism from debonding of the joint …
Iron (II) isothiocyanate complexes with substituted pyrazines: Experimental and theoretical views on their electronic structure
Abstract Synthesis, structural, magnetic, Mossbauer and thermal studies of isothiocyanate iron (II) complexes with substituted pyrazines (iodo-, bromo- and amino-derivatives) are discussed here. Complexes with iodo- and bromo-derivatives were found to have the composition [Fe(Ipz)2(SCN)2(H2O)2]·2Ipz (1) and [Fe(Brpz)2(SCN)2(H2O)2]·2Brpz (2), whereas in the case of amino-functionalized pyrazine the formation of [Fe(NH2pz)4(SCN)2] (3) was observed. 3D organization of the molecular complexes is stabilized within different hydrogen, halogen and lone pair–π interactions. Spin state of iron (II) ions in 1–3 was determined as high spin by Mossbauer and magnetic measurements. DFT calculations for t…
CCDC 961423: Experimental Crystal Structure Determination
Related Article: S.I. Shylin, I.A. Gural’skiy, D. Bykov, S. Demeshko, S. Dechert, F. Meyer, M. Hauka, I.O. Fritsky|2015|Polyhedron|87|147|doi:10.1016/j.poly.2014.11.016
CCDC 961421: Experimental Crystal Structure Determination
Related Article: S.I. Shylin, I.A. Gural’skiy, D. Bykov, S. Demeshko, S. Dechert, F. Meyer, M. Hauka, I.O. Fritsky|2015|Polyhedron|87|147|doi:10.1016/j.poly.2014.11.016
CCDC 961422: Experimental Crystal Structure Determination
Related Article: S.I. Shylin, I.A. Gural’skiy, D. Bykov, S. Demeshko, S. Dechert, F. Meyer, M. Hauka, I.O. Fritsky|2015|Polyhedron|87|147|doi:10.1016/j.poly.2014.11.016