scholarly journals AN EXPERIMENTAL STUDY OF THE DEFORMATION OF POLYURETHANE ELASTOMERS APPLIED IN THE SHIP�S SHOCK-ABSORBERS

2019 ◽  
Vol 11 (3) ◽  
pp. 534-542
Author(s):  
Aleksandr A. Chernysh ◽  
◽  
Stanislav N. Yakovlev ◽  
Keyword(s):  
Experimental Study ◽  
Polyurethane Elastomers ◽  
Shock Absorbers

Experimental study of vibroinsulating properties of modern structural polyurethane

2019 ◽  
pp. 120-127
Author(s):  
S. N. Yakovlev ◽  
A. A. Chernysh
Keyword(s):  
Experimental Study ◽  
Absorption Coefficient ◽  
Energy Absorption ◽  
Experimental Research ◽  
Mechanical Engineering ◽  
Polyurethane Elastomer ◽  
Polyurethane Elastomers ◽  
Final Choice ◽  
Shock Absorbers ◽  
Two Parameters

Modern mechanical engineering often uses polyurethane elastomers as vibroinsulating material. It is difficult to choose the most perfect structural polyurethane among a large number of proposed materials for manufacturing shock absorbers. The article presents experimental research of vibroinsulating properties using two parameters out of five. Based on preliminary tests, an implicit preference is given to one of the three proposed materials. The energy absorption coefficient and the creep of the elastomer are chosen as criteria for evaluating the vibroinsulation properties of polyurethane elastomers. Final choice of polyurethane elastomer for shock absorbers manufacturing could be made if additional tests are carried out for studying three criteria.

scholarly journals The papillary muscles as shock absorbers of the mitral valve complex. An experimental study☆☆☆

2007 ◽  
Vol 32 (1) ◽  
pp. 96-101 ◽  
Author(s):  
Thomas M. Joudinaud ◽  
Corrine L. Kegel ◽  
Erwan M. Flecher ◽  
Patricia A. Weber ◽  
Emmanuel Lansac ◽  
...  
Keyword(s):  
Experimental Study ◽  
Mitral Valve ◽  
Papillary Muscles ◽  
Shock Absorbers

Experimental study on impact behaviors of rubber shock absorbers

2018 ◽  
Vol 173 ◽  
pp. 718-729 ◽  
Author(s):  
Xiao-Hong Long ◽  
Yong-Tao Ma ◽  
Rong Yue ◽  
Jian Fan
Keyword(s):  
Experimental Study ◽  
Shock Absorbers

Researching internal friction module of polyurethane elastomers under alternating bending with rotation

2019 ◽  
pp. 71-78
Author(s):  
L. V. Podkolzina ◽  
S. N. Yakovlev ◽  
A. A. Chernysh
Keyword(s):  
Internal Friction ◽  
Evaluation Criteria ◽  
Frequency Range ◽  
Polyurethane Elastomers ◽  
Comparative Tests ◽  
Shock Absorbers ◽  
Elastomeric Materials ◽  
Reasonable Choice ◽  
Two Parameters ◽  
Alternating Bending

Today there is a large number of vibration-proof materials for the manufacture of shock absorbers in the market of structural materials. For a reasonable choice, it is necessary to perform comparative tests of different elastomers according to several criteria. The paper presents the results of two-parameters comparative tests of three brands of polyurethane elastomers. As the evaluation criteria, the internal friction module and the loss tangent of elastomeric materials under alternating bending with rotation are chosen. High stability of physicomechanical properties of polyurethane elastomers is studied in the entire frequency range of mechanical vibrations.

scholarly journals Experimental study of repair mixtures as glues for connecting elastomers with metals

2019 ◽  
Vol 265 ◽  
pp. 01016 ◽  
Author(s):  
Anatoliy Ishchenko ◽  
Viktor Artiukh ◽  
Vladlen Mazur ◽  
Sergey Poberezhskii ◽  
Maxim Aleksandrovskiy
Keyword(s):  
Experimental Study ◽  
Dynamic Loading ◽  
Energy Intensity ◽  
High Energy ◽  
Metallurgical Equipment ◽  
Shock Absorbers ◽  
Steel Surfaces ◽  
Elastic Couplings ◽  
Technical Solutions

Experimental study of strength of glued connections where repair mixtures Diagum FL, Diagum Р and Diaflex are used is shown. Suggestions of each repair mixture use are given. Obtained results provide developing of durable and economical technical solutions: shear shock absorbers, elastic couplings, elastic shafts with high energy intensity which in some cases allow to avoid failures of metallurgical equipment under dynamic loading. In addition, use of repair mixtures with elastomers helps to make durable coatings of steel surfaces.

Experimental study of heating of a polyurethane shock absorber under cyclic loading

2020 ◽  
pp. 22-25
Author(s):  
S.N. Yakovlev
Keyword(s):  
Experimental Study ◽  
Cyclic Loading ◽  
Vibration Amplitude ◽  
Shock Absorber ◽  
Heating Temperature ◽  
Loading Frequency ◽  
Empirical Dependence ◽  
Shock Absorbers ◽  
Compression Deformation ◽  
Relative Compression

Based on the results of the experiments, an empirical dependence was obtained to determine the heating temperature of polyurethane shock absorbers of different hardness under cyclic loading, depending on the relative compression deformation, loading frequency and vibration amplitude. Keywords: polyurethane, shock absorber, heating temperature, empirical dependence. [email protected]

Experimental study on the restoration from a tilt-azimuth series for improvement in resolution

1995 ◽  
Vol 53 ◽  
pp. 636-637
Author(s):  
Norio Baba ◽  
Norihiko Ichise ◽  
Syunya Watanabe
Keyword(s):  
Experimental Study ◽  
Spherical Aberration ◽  
Incident Beam ◽  
Optical Parameters ◽  
Beam Tilting ◽  
Illumination Method ◽  
Restoration Method ◽  
Illumination Mode

The tilted beam illumination method is used to improve the resolution comparing with the axial illumination mode. Using this advantage, a restoration method of several tilted beam images covering the full azimuthal range was proposed by Saxton, and experimentally examined. To make this technique more reliable it seems that some practical problems still remain. In this report the restoration was attempted and the problems were considered. In our study, four problems were pointed out for the experiment of the restoration. (1) Accurate beam tilt adjustment to fit the incident beam to the coma-free axis for the symmetrical beam tilting over the full azimuthal range. (2) Accurate measurements of the optical parameters which are necessary to design the restoration filter. Even if the spherical aberration coefficient Cs is known with accuracy and the axial astigmatism is sufficiently compensated, at least the defocus value must be measured. (3) Accurate alignment of the tilt-azimuth series images.

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