scholarly journals Particularities for determination stress state components of large radius curvature ring expansion process.

2012 ◽  
Vol 65 (3) ◽  
pp. 61-67
Author(s):  
G.L. Petrosyan ◽  
H.G. Petrosyan ◽  
S.R. Motallebi
Keyword(s):  
Stress State ◽  
Ring Expansion ◽  
Large Radius ◽  
Expansion Process

ChemInform Abstract: New Route to Pyrido[1,2-b]pyridazinium Inner Salts. Evidence of a 1,3-Dipolar Cycloaddition-Ring Expansion Process.

ChemInform ◽  
2010 ◽  
Vol 30 (17) ◽  
pp. no-no
Author(s):  
Jesus Valenciano ◽  
Ana M. Cuadro ◽  
Juan J. Vaquero ◽  
Julio Alvarez-Builla
Keyword(s):  
Ring Expansion ◽  
Dipolar Cycloaddition ◽  
Expansion Process

Development and Validation of Numerical Model for Predicting Electromagnetic Expansion of Composite Rings

2013 ◽  
Vol 198 ◽  
pp. 627-632
Author(s):  
Jacek Janiszewski ◽  
Robert Panowicz
Keyword(s):  
Numerical Model ◽  
Ring Expansion ◽  
Constitutive Relationship ◽  
Numerical Code ◽  
Expansion Process ◽  
Ring Specimen ◽  
Good Convergence ◽  
Composite Ring ◽  
High Strain Rate Deformation ◽  
Development And Validation

In the present work, the description of a numerical model for predicting the electromagnetic composite ring expansion process and validation of a developed numerical code is presented. The strength response of rings materials under high strain rate deformation was described by using the well-known JohnsonCook constitutive relationship. Numerical considerations and experimental validation were performed for a composite ring consisted of a copper drive ring and X37CrMoV51 steel ring specimen. The analyses of the obtained results allow to find out that good convergence of theoretical and experimental data was achieved.

Theoretical study on the reaction mechanism of cyclopropenylidene with azacyclopropane: ring expansion process

2014 ◽  
Vol 145 (7) ◽  
pp. 1109-1115 ◽  
Author(s):  
Xiaojun Tan ◽  
Weihua Wang ◽  
Ying Jing ◽  
Fang Wang ◽  
Ping Li
Keyword(s):  
Reaction Mechanism ◽  
Theoretical Study ◽  
Ring Expansion ◽  
Expansion Process

scholarly journals New route to pyrido[1,2-b]pyridazinium inner salts. Evidence of a 1,3-dipolar cycloaddition-ring expansion process

1999 ◽  
Vol 40 (4) ◽  
pp. 763-766 ◽  
Author(s):  
Jesús Valenciano ◽  
Ana M. Cuadro ◽  
Juan J. Vaquero ◽  
Julio Alvarez-Builla
Keyword(s):  
Ring Expansion ◽  
Dipolar Cycloaddition ◽  
Expansion Process

13C magnetic resonance studies. 124. Preparative ring expansions of bicyclic ketones by homoketonization of cyclopropoxide analogs

1986 ◽  
Vol 64 (7) ◽  
pp. 1390-1399 ◽  
Author(s):  
Vijay Patel ◽  
Arthur J. Ragauskas ◽  
J. B. Stothers
Keyword(s):  
Magnetic Resonance ◽  
Ring Expansion ◽  
Synthetic Method ◽  
Expansion Process ◽  
Enol Ethers ◽  
Magnetic Resonance Studies ◽  
Silyl Ethers ◽  
Silyl Enol Ethers ◽  
Ring Expansions ◽  
Bicyclic Ketones

Homoketonization of some readily prepared cyclopropoxides provides a new synthetic method for ring expansion of the [2.2.1] and [2.2.2] ring systems. Cyclopropanation of the trimethylsilyl enol ethers derived from a variety of polycyclic ketones affords the required cyclopropyl silyl ethers, which may be ketonized directly or hydrolyzed to the corresponding cyclopropanols before ketonization. The results for fourteen examples serve to define the scope of the ring expansion process, and the silyl enol ethers, cyclopropyl silyl ethers, and most of the corresponding cyclopropanols have been characterized by 13Cmr. The stereochemistry of the ketonization leading to ring expansion has been established by deuterium labelling experiments.

Sign in / Sign up

Export Citation Format

Share Document