Determination of the ultimate plastic capacity for powder materials based on the plastic flow model for porous solids. II. Influence of porosity and the stress-strain properties of the solid phase on the ultimate plastic capacity of a porous sintered material

2000 ◽  
Vol 39 (1-2) ◽  
pp. 7-10 ◽  
Author(s):  
M. B. Shtern ◽  
V. D. Dudunov
Keyword(s):  
Plastic Flow ◽  
Flow Model ◽  
Sintered Material ◽  
Solid Phase ◽  
Porous Solids ◽  
Powder Materials ◽  
Stress Strain ◽  
Porous Sintered Material

A porous sintered material consisting of Presep PolyChelate as a chelating resin and particulate polyethylene as a thermoplastic binder for solid-phase extraction of trace elements

Talanta ◽  
2018 ◽  
Vol 188 ◽  
pp. 665-670 ◽  
Author(s):  
Shigehiro Kagaya ◽  
Toshifumi Katoh ◽  
Mitsuru Saito ◽  
Mayu Ohki ◽  
Riko Shirota ◽  
...  
Keyword(s):  
Trace Elements ◽  
Solid Phase Extraction ◽  
Sintered Material ◽  
Solid Phase ◽  
Chelating Resin ◽  
Phase Extraction ◽  
Porous Sintered Material ◽  
Extraction Of Trace Elements

scholarly journals Estimation of the Stress-Strain State of a Discrete Medium by a Plastic Flow Model

2019 ◽  
Vol 93 (3) ◽  
pp. 29-38
Author(s):  
O.A. Dorofeyev ◽  
◽  
V.V. Kovtun ◽  
Keyword(s):  
Plastic Flow ◽  
Strain State ◽  
Flow Model ◽  
Stress Strain ◽  
Stress Strain State ◽  
Discrete Medium

A Principle of Maximum Plastic Resistance

1943 ◽  
Vol 10 (2) ◽  
pp. A65-A68
Author(s):  
M. A. Sadowsky
Keyword(s):  
Plastic Flow ◽  
New Method ◽  
Plastic Body ◽  
Stress Strain ◽  
Inner Pressure ◽  
Explicit Reference ◽  
Complete Determination ◽  
Successful Analysis ◽  
Principle Of Maximum

Abstract Heretofore a complete determination of stresses in a plastic body has been dependent upon a successful analysis of deformation in plastic flow, the method of computation being essentially based on Nadai’s stress-strain relations. The principle of maximum plastic resistance, as introduced in this paper, establishes a new method of computation of stresses only, without any explicit reference to deformation. Formally, the principle is progressive, since it supplies equations sufficient for solution; intrinsically and physically, the principle treats the plastic body as a reacting medium automatically producing maximum values of resultant reaction. Combined plastic tension, torsion, and inner pressure (in a boiler) are chosen as cases in which to apply the principle. The results are condensed in the relative diagram accompanying the paper.

VISCOELASTIC BEHAVIOR OF CONDUCTIVE POLYMER BASED ER DISPERSIONS UNDER SMALL DEFORMATIONS

2007 ◽  
Vol 21 (28n29) ◽  
pp. 4758-4766
Author(s):  
ANNA KRZTOŃ-MAZIOPA ◽  
MARCIN OSUCHOWSKI ◽  
JANUSZ PŁOCHARSKI
Keyword(s):  
Electric Field ◽  
Yield Point ◽  
Silicone Oil ◽  
Solid Phase ◽  
Conductive Polymer ◽  
Viscoelastic Behavior ◽  
Stress Strain ◽  
Maximum Deformation ◽  
Er Fluids

ER fluids under shear are often approximated by the Bingham model with the electric field induced yield stress. This approach, however, neglects the properties of the solid phase created. The oscillation measurements taken under field below the yield point and leading to calculation of storage and loss moduli of the electrified solid do not allow for determination of the full stress–strain relationship of the solidified ER suspension. In order to overcome this problem and collect information about the mechanical properties of this solid a dedicated rheometer was constructed capable of measuring small strains under moderate stresses and under electric field. Full shapes of the stress–strain curves were recorded leading to determination of storage modulus, maximum deformation and yield point. Looking for relations between the viscoelastic behavior of ER suspensions and properties of their material components a series of fluids comprising silicone oil dispersions of conductive polymers (polyaniline, poly(p-phenylene), pyrolyzed polyacrylonitrile) and polymer electrolytes (polyacrylonitrile complexes with inorganic salts) was studied. It was found that the viscoelastic responses of ER fluids were affected by material characteristics of the dispersed phase.

Determination of creep mechanisms in various silicon carbides via TEM

1986 ◽  
Vol 44 ◽  
pp. 484-487
Author(s):  
C. H. Carter ◽  
J. E. Lane ◽  
J. Bentley ◽  
R. F. Davis
Keyword(s):  
Heat Exchangers ◽  
Sintered Material ◽  
Polycrystalline Material ◽  
Chemical Vapor ◽  
Graphite Substrate ◽  
Second Phase ◽  
Reaction Bonding ◽  
Creep Mechanisms ◽  
Porous Sic

Silicon carbide (SiC) is the generic name for a material which is produced and fabricated by a number of processing routes. One of the three SiC materials investigated at NCSU is Norton Company's NC-430, which is produced by reaction-bonding of Si vapor with a porous SiC host which also contains free C. The Si combines with the free C to form additional SiC and a second phase of free Si. Chemical vapor deposition (CVD) of CH3SiCI3 onto a graphite substrate was employed to produce the second SiC investigated. This process yielded a theoretically dense polycrystalline material with highly oriented grains. The third SiC was a pressureless sintered material (SOHIO Hexoloy) which contains B and excess C as sintering additives. These materials are candidates for applications such as components for gas turbine, adiabatic diesel and sterling engines, recouperators and heat exchangers.

Modern determinants of endometrium hyperplastic processes pathogenesis

2016 ◽  
pp. 137-142
Author(s):  
V.O. Benyuk ◽  
◽  
V.M. Goncharenko ◽  
T.R. Nykoniuk ◽  
◽  
...  
Keyword(s):  
Conservative Therapy ◽  
Solid Phase ◽  
Research Direction ◽  
Immunohistochemical Method ◽  
Results Of Treatment ◽  
Treatment And Prevention ◽  
Receptor Phenotype ◽  
The Relationship ◽  
Endometrial Proliferation

The objective: to еxplore the relationship between the activity of endometrial proliferation and the state of the local immune response in the uterus in the conditions berprestasi process. Patients and methods. Examined 228 women of reproductive and perimenopausal age with endometrial pathology using ultrasound and then performing hysteroresectoscopy. Determination of the concentrations of the cytokines IL-1, IL-2, IL-6 and TNF was performed by solid phase ELISA. Results. Found a trend that confirms the loss of sensitivity to hormones at the stage of malignancy of the endometrium and can be used as diagnostic determinants in determining the nature of intrauterine pathology and criterion of the effectiveness of conservative therapy. Conclusion. Improving etiopatogenetice approach to the therapy of hyperplastic proce.sses of endometrium with determination of receptor phenotype of the endometrium is a research direction in modern gynecology, which will help to improve the results of treatment and prevention of intrauterine pathology. Key words: endometrial hyperplasia,the receptors for progesterone and estrogen, immunohistochemical method.

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