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EXPERIMENTAL AND ThEORETICAL INVESTIGATION OF ThE FIRST FOLD CREATION IN ThIN WALLED COLUMNS

Acta Mechanica Solida Sinica 2010年第4期23卷 353-360页

作者： Abbas Niknejad G.h.Liaghat h.moslemi naeini A.h.Behravesh Mechanical Engineering Department Yasouj University Faculty of Engineering Payame Noor University (PNU) Mechanical Engineering Department Faculty of EngineeringTarbiat Modares University

In this paper, a theoretical formula is presented to predict the instantaneous folding force of the first fold creation in square and rectangular columns under axial *** rectangular column is a small and single model of honeycombs with square or rectangular *** are based on the analysis of the Basic Folding Mechanism （BFM）.For this purpose, sum of the dissipated energy rate under bending around horizontal and inclined hinge lines and the dissipated energy rate under extensional deformations was equal to the work rate of the external force on the *** final formula obtained in this research, reasonably predicts the instantaneous folding force of single-cell square and rectangular honeycombs instead of the average ***, according to the calculated theoretical relation, the instantaneous folding force of the first fold creation in a square column was sketched versus folding distance and compared to the experimental results, which showed a good correlation.

关键词： dissipated energy rate first fold creation instantaneous folding force thin walled column

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Fe_3O_4/油酸担载肟衍生环钯配合物中钯粒子作为催化剂催化无铜Sonogashira交联反应（英文）

引用

催化学报 2015年第7期36卷 1047-1053页

作者： Kazem Karami Samaneh Dehghani Najvani Nasrin haghighat naeini Pablo hervés DepartmentofChemistry IsfahanUniversityofTechnologylsfahan84156/83111lran Departmentofchernistry UniversityofVigo36310VigoSpain

An oxime-derived palladacycle was synthesized using 4-bromobenzoxime and pyridine in ChCl3, and characterized by FT-IR and 1h NMR spectroscopy. This Pd complex was supported on Fe3O4/oleic acid and shown to be an efficient catalyst for the copper-free Sonogashira cross-coupling reaction of various aryl halides with phenylacetylene in air and in ethanol or mixed aqueous medium. The oxime- derived palladacycle gave highly active palladium nanoparticles for the organic synthesis. The coupling products were obtained in high yields with low Pd loading and the heterogeneous catalyst can be separated by an external magnet and reused six times without loss of its activity. The characterization of the catalyst was carried out by XRD, SEM and TEM. Both TEM and XRD revealed that the palladium nanoparticles were well dispersed with diameters from 5 to 10 nm and average size 9.97 nm.

关键词：交叉偶联反应多相催化剂四氧化三铁钯化合物钯微粒衍生油酸支撑

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