scholarly journals INFLUENCE OF BABBIT RHEOLOGICAL PROPERTY UPON STRESSES IN ANTIFRICTION LAYER OF SLIDER BEARING

2016 ◽  
Vol 2016 (4) ◽  
pp. 66-74
Author(s):  
Александр Яковлев ◽  
Aleksandr Yakovlev ◽  
Михаил Зернин ◽  
Mikhail Zernin
Keyword(s):  
Residual Stresses ◽  
Rheological Property ◽  
Rheological Properties ◽  
Cyclic Deformation ◽  
Strength Characteristics ◽  
Slider Bearing ◽  
Complete Relaxation

The procedure for tests of contact creep in ring bearing-samples is developed and also a generalized diagram of residual stresses formation after babbitting and machining a babbit layer in bearings is obtained. It is shown that the existence of a cyclic deformation of an antifriction layer results in a complete relaxation of the sum of all constant constituents of residual stresses. It is concluded that the main reason of the dissi-pation of strength characteristics in babbit samples consists in rheological properties of this material.

Research on the Effect of Polycarboxylate Superlasticizers on Reheology Properties of Compound Cementitious System

2011 ◽  
Vol 477 ◽  
pp. 151-156 ◽  
Author(s):  
Dong Min Wang ◽  
Zhi Hua Liu ◽  
Wei Feng Xiong
Keyword(s):  
Molecular Structure ◽  
Rheological Property ◽  
Rheological Properties ◽  
Molecular Structures ◽  
Mineral Admixture ◽  
Dispersion Property ◽  
Cementitious System ◽  
Adsorption Amount ◽  
Polymer Surfactants ◽  
Cementitious Systems

The rheological property is the best method which can directly reflect the dispersion property of polymer surfactants. In this paper, the rheological properties in the systems of pure cement, cement/fly ash and cement/silica fume with polycarboxylate superplasticizers of different molecular structures were studied. The effect of molecular structure on shear sress, apparent viscosity and thixotropy in compound cementitious systems was expatiated. At last, the rules of mineral admixture to the system’ rheological property and the relations between adsorption amount and rheological properties were put forward.

Rheological Property of Waxy Crude Oil in Restart Process of Pipeline

2010 ◽  
Author(s):  
Yanbo Xu ◽  
Qiyu Huang
Keyword(s):  
Rheological Property ◽  
Crude Oil ◽  
Rheological Properties ◽  
Yield Stress ◽  
Outlet Temperature ◽  
Waxy Crude Oil ◽  
Time Duration ◽  
Waxy Crude

In the restart process of pipeline containing waxy crude oil after shutdown, the rheological properties of oil, including viscosity, yield stress and thixotropy is studied. The entire restart process is decided by various factors; in this paper the effects of outlet temperature, shutdown and restart temperature as well as shutdown time duration to the rheological property are taken into the consideration. The measurements are employed using a controlled shearing rheometer to investigate rheological property based on different restart conditions. In addition, this paper has also researched affection of emulsion and blended samples mixing with two types of crude oil in various ratios. Finally comprehensive rheological evaluation to restartability is obtained.

Influence of Acidic Impurities on Rheological Properties of Boron/Agglomerated Boron and HTPB Slurry

2013 ◽  
Vol 815 ◽  
pp. 898-904
Author(s):  
Xiu Li Hu ◽  
Wei Liang Zhou ◽  
Le Qin Xiao ◽  
Xiao Xia Jian
Keyword(s):  
Weight Gain ◽  
Rheological Property ◽  
Rheological Properties ◽  
Phase Structure ◽  
Oxidation Degree ◽  
Strong Function ◽  
Structure Morphology

The rheological properties of HTPB mixed with boron (B) or agglomerated boron (TB) were investigated to explore the effect of the impurities of boron on the processing of propellant. The phase structure, morphology, and acidity of each sample were characterized by XRD, SEM and pH, respectively. The results show that rheological property of B/HTPB can be significantly improved by agglomerating boron with binder. Time has little effect on the viscosity of TB/HTPB while that of B/HTPB is a strong function of time. The viscosity of TB/HTPB decreases when the temperature increases from 303K to 343K, while that of B/HTPB decreases from 303K to 323K and then increases sharply after 323K. After agglomerating with binder, theTonsetof boron reduces from 1056K to 954K andTpdrops from 1076K to 998K. Compared with B2, the weight gain and oxidation degree of TB2 increases by 27% and 8.5%, respectively.

Study on Crystallization and Rheological Behavior of PEN/PET Blends

2013 ◽  
Vol 830 ◽  
pp. 72-75 ◽  
Author(s):  
Cheng Zhi Chuai ◽  
Kai Li
Keyword(s):  
Tensile Strength ◽  
Rheological Property ◽  
Rheological Properties ◽  
Rheological Behavior ◽  
Impact Resistance ◽  
Crystallization Rate ◽  
Nucleating Agent

The crystallization and rheological properties of PET were studied by using capillary remoter and plate remoter in the paper. The results showed that the addition of PEN could improve the rheological property of PEN/PET blends and the addition of PC could improve the toughness of PEN/PET blends. Besides, Nucleating agent could accelerate the crystallization rate and form crystal particles with small dense in order to improve the properties of impact resistance, tensile strength and transparency of products.

Effect of residual stresses in a composite material on its effective rheological properties

1985 ◽  
Vol 21 (1) ◽  
pp. 46-52 ◽  
Author(s):  
V. P. Miroshnikov ◽  
Yu. M. Zanimonets
Keyword(s):  
Composite Material ◽  
Residual Stresses ◽  
Rheological Properties

Influence of Thermal Cyclic Deformation and Hardening Heat Treatment on the Structure and Properties of Steel 10

2015 ◽  
Vol 788 ◽  
pp. 187-193 ◽  
Author(s):  
Aleksandr Prudnikov ◽  
Marina Popova ◽  
Vladimir Prudnikov
Keyword(s):  
Heat Treatment ◽  
Cyclic Deformation ◽  
Sheet Steel ◽  
Strength Characteristics ◽  
Rolled Sheet ◽  
Structure And Properties ◽  
Fine Grained ◽  
Fine Grained Structure ◽  
Hot Rolled ◽  
Hardening Heat Treatment

The results of the influence of preliminary thermal cyclic deformation and subsequent hardening heat treatment on the microstructure and mechanical properties of hot-rolled sheet steel 10 are presented. It is shown that the use of preliminary thermal cyclic deformation of the steel 10 stock material results in a fine-grained structure of a hot-rolled sheet (3 mm thick) produced by an industrial technology. Deformation occurred at a temperature above AC3 (1250 °C), with cooling to 200-300 °C during 10 cycles and the deformation ratio per cycle being 6-8 %. Such a treatment before sheet hot-rolling allows increasing the strength characteristics (tensile strength, yield strength) by almost 30 %. It has been established that the use of subsequent heat treatment (quenching, 900 °C, water and tempering 1 h, 600 °C) leads to a further increase in strength characteristics by 15-20% while maintaining a sufficient level of ductility of sheet steel.

scholarly journals Analysis of Thermal Effect on Residual Stresses of Broached Inconel 718

2014 ◽  
Vol 996 ◽  
pp. 574-579 ◽  
Author(s):  
Zhe Chen ◽  
Ru Lin Peng ◽  
Pajazit Avdovic ◽  
Johan Moverare ◽  
Fredrik Karlsson ◽  
...  
Keyword(s):  
Residual Stresses ◽  
Inconel 718 ◽  
Thermal Exposure ◽  
Surface Region ◽  
Surface Residual Stress ◽  
Nickel Based Superalloy ◽  
Complete Relaxation ◽  
Stress States ◽  
High Level ◽  
Compressive Residual Stresses

Inconel 718 is a nickel based superalloy that is widely used as a turbine disc material in gas turbine industries. This study details the effect of thermal exposure on the residual stresses produced when broaching Inconel 718. The chosen parameters for broaching in this study are similar to those used when manufacturing turbine discs. The broaching operation produced a high level of tensile residual stresses at the broached surface. A layer with tensile residual stresses was formed in the sub-surface region, followed by a layer several times thicker with compressive residual stresses. Thermal exposure was conducted at 550 °C. The depth distributions of residual stresses after thermal exposure are presented and discussed in this paper. Complete relaxation of the surface tensile residual stresses was observed after 30 h thermal exposure, whereas the 3000 h thermal exposure influenced both the surface and sub-surface residual stress states.

MANUFACTURING TECHNOLOGIES OF POLYMER COMPOSITE MATERIALS ON THERMOPLASTICS (review)

2021 ◽  
pp. 78-86
Author(s):  
A.E. Sorokin ◽  
◽  
V.A. Sagomonova ◽  
A.P. Petrova ◽  
L.V. Solovyanchik ◽  
...  
Keyword(s):  
Composite Materials ◽  
Residual Stresses ◽  
Polymer Composite ◽  
Technological Process ◽  
Thermoplastic Composite ◽  
Strength Characteristics ◽  
Polymer Composite Materials ◽  
Complex Products ◽  
Thermoplastic Matrix ◽  
Manufacturing Technologies

Various technologies for the production of prepregs based on a thermoplastic matrix and composite materials based on them are considered. Their advantages over the technologies of manufacturing polymer composite materials based on a thermosetting matrix are presented. It is shown that the use of melt technology allows the production of fiberglass with the highest level of strength characteristics. An algorithm for estimating residual stresses in a thermoplastic composite to optimize the technological process of producing complex products is described.

REDUCING THE HARMFUL IMPACT OF INDUSTRIAL PRODUCTION ON THE ENVIRONMENT BY USING MAN-MADE WASTE

2021 ◽  
Vol 4 (1) ◽  
pp. 109-121
Author(s):  
M.M. Khayrutdinov ◽  
◽  
R.A. Kovalev ◽  
A.B. Kopylov ◽  
N.D. Kulakov ◽  
...  
Keyword(s):  
Rheological Properties ◽  
Industrial Production ◽  
Strength Characteristics ◽  
Closed Cycle ◽  
The Impact ◽  
Positive Effect ◽  
Impact Of Mining

The admissibility of replacing traditional cement, used as a binder with magnesium-containing man-made waste in the preparation of a construction and fill mixture is justified. The possibility of replacing the traditional specially mined aggregate in constriction and fill mixtures is proved. The results of testing samples after cementing and a construction-fill mix-ture prepared on the basis of man-made waste are presented. The positive effect of mechani-cal activation of the backfill mixture components on its rheological properties and strength characteristics of the fill mass is studied. The use of lignosulfonate as an additive was con-firmed to improve the binding and rheological properties of the backfill mixture. The in-volvement of man-made waste in the closed cycle of the main and auxiliary production reduc-es the volume of man-made mass, which significantly lowers the impact of mining on the environment.

Performance Study of Coal Water Slurry

2014 ◽  
Vol 716-717 ◽  
pp. 16-19
Author(s):  
Ke Gai ◽  
Hui Li Qi ◽  
Dong Ping Ma ◽  
Wen Li Liang
Keyword(s):  
Rheological Property ◽  
Rheological Properties ◽  
Apparent Viscosity ◽  
Performance Study ◽  
Water Slurry ◽  
Coal Water Slurry ◽  
The Stability ◽  
Increasing Temperature

This paper is based on the research of the coal water slurry rheological property and stability. The influence of the concentration, additives and temperature on the rheological properties of the slurry has also been studied. The apparent viscosity increases with increasing concentration of coal water slurry, and decreases with increasing temperature. An introduction of additives can greatly improve the rheological properties of coal water slurry. The stability of coal water slurry increases with the increase of concentration, and the stability decreases with the increase of temperature. A proper amount of additives can improve its stability.

Sign in / Sign up

Export Citation Format

Share Document