Rossby solitons (Experimental investigations and laboratory model of natural vortices of the Jovian Great Red Spot type)

The use of hollow clay elements (fictile tubules, amphorae and caroselli) for erecting arches, vaults and domes was a building technique very popular in the Mediterranean area from the Roman Empire on. It was devised to ensure lightness and thermal insulation of structural elements. This paper presents experimental investigations and some preliminary numerical analyses regarding an arch consisting of caroselli embedded in mortar. A full-scale laboratory model was constructed and subject to vertical loads. After the development of hinges, the arch was repaired and strengthened with FRCM strips and further loads were applied to investigate the post-strengthening mechanical behavior. Also, numerical models of caroselli and mortar are created in Abaqus. Then, an elementary cell comprised of caroselli and mortar is created. The mechanical properties of the cell are evaluated by studying its behavior under uniaxial tensile and compressive loads. These properties set the basis for a possible homogenized material which can be used for numerical analyses of the arch.

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EXPERIMENTAL INVESTIGATION OF LABORATORY PROTOTYPE OF SPACECRAFT OPTICAL TELESCOPE ASSEMBLY IN LABORATORY CONDITIONS

Vestnik of Samara University Natural Science Series ◽

10.18287/2541-7525-2014-20-7-134-144 ◽

2017 ◽

Vol 20 (7) ◽

pp. 134-144

Author(s):

S.V. Tsaplin ◽

S.A. Bolychev ◽

B.S. Mishagin ◽

D.V. Shemanaev

Keyword(s):

Thermal Regime ◽

Temperature Stability ◽

Thermal Control ◽

Laboratory Model ◽

Experimental Investigations ◽

High Temperature Stability ◽

Optical Telescope ◽

Earth Remote Sensing ◽

Precision System ◽

Laboratory Prototype

In this paper the speciﬁcations of precision system of ensuring thermal regime of spacecraft optical telescope assembly designed for Earth remote sensing are considered. The laboratory model of thermal control system is designed for ex- perimental investigations in the vacuum chamber. Experimental investigations of laboratory model of thermal regime under conditions of simulating space enviroment (low space temperature, direct and reﬂected from the Earth solar ﬂux, Earth heat ﬂux) is carried out. High temperature stability and low power consumption of the system is shown.

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Experimental investigations of a laboratory model Hall thruster

10.2514/6.1996-2707 ◽

1996 ◽

Author(s):

F. Scortecci ◽

A. Serra ◽

A. Di Gianvito ◽

M. Andrenucci

Keyword(s):

Hall Thruster ◽

Laboratory Model ◽

Experimental Investigations

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Experimental Investigations of the Rubber-Asphalt Sliding Pair Dynamics

Dynamic Systems and Control ◽

10.1115/imece2002-32155 ◽

2002 ◽

Cited By ~ 1

Author(s):

Ante Bozˇic´ ◽

Ivan Petrovic´ ◽

Nedjeljko Peric´ ◽

Jadranko Matusˇko

Keyword(s):

Friction Coefficient ◽

Dynamic Behavior ◽

Friction Force ◽

Contact Surface ◽

Friction Model ◽

Laboratory Model ◽

Experimental Investigations ◽

Dynamic Friction ◽

The Road ◽

Friction Models

A laboratory model for experimental investigations of the rubber-asphalt sliding pair has been designed with the purpose of better understanding of dynamic behavior of the friction force in the contact patch between the car tire and the road. Its design is described and some experimental results are given. These results confirm that it is essential to use a dynamic friction model in order to describe friction force in contact between the car tire and the road. Moreover, they indicate that the existing dynamic friction models night be physically incorrect regarding the change of friction coefficient for an asperity bristle passing through the contact surface.

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Use of Reclaimed Rubber Cell in Highway Pavement: An Experimental Research

International Journal of Innovative Technology and Exploring Engineering - Special Issue ◽

10.35940/ijitee.f1216.0486s419 ◽

2019 ◽

Vol 8 (6S4) ◽

pp. 1047-1052

Keyword(s):

Environmental Concern ◽

Flexible Pavement ◽

Model Tests ◽

Laboratory Model ◽

Experimental Investigations ◽

Effective Utilization ◽

Test Tank ◽

The World ◽

Waste Tyres ◽

Reinforcing Material

With the rapidly growing number of vehicles around the world, the disposal of the waste and discarded tyres is a serious concern worldwide. There are few investigations reported in the literature w.r.t. the use of the regenerated rubber derived from the waste tyres in the construction of pavements. The highway construction forms a potential sector for the use of such waste whereby the problem of its disposal will get eliminated on one hand and reduce the environmental concern on the other hand. The use of such waste is found to improve the performance and strength of the pavement. This paper presents the limited experimental investigations on the use of innovative reinforcement in the form of rubber cell derived from the regenerated or reclaimed tyres in the pavement application. The rubber cell derived is similar to conventional geocell. The experimental study entails the use of the rubber cell placed within the conventional granular sub-base (GSB) of the conventional flexible pavement through a model pavement. The laboratory model tests were conducted with the help of the test tank of dimensions (1 m × 1m × 1m). The sub-base was placed above the weak subgrade in a test tank. The results of the laboratory model tests indicates the better performance of the pavement with the use of the rubber cell in the sub-base as compared to the performance of the pavement with conventional granular subbase without rubber cell reinforcement. The study confirms the effective utilization of the discarded tyres as a reinforcing material in the pavements.

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