Design calculation procedure for pneumatic conveyor intended to handle granular materials in decelerated dense layer

1989 ◽  
Vol 25 (9) ◽  
pp. 435-439
Author(s):  
B. F. Stepochkin ◽  
Yu. I. Razinov
Keyword(s):  
Granular Materials ◽  
Calculation Procedure ◽  
Dense Layer ◽  
Design Calculation

Creep Modeling in Bolted Flange Joints

2004 ◽  
Author(s):  
Abdel-Hakim Bouzid ◽  
Akli Nechache
Keyword(s):  
High Temperatures ◽  
Contact Stress ◽  
Analytical Method ◽  
Calculation Procedure ◽  
Design Calculation ◽  
Bolted Joint ◽  
Load Relaxation ◽  
Gasket Material ◽  
Bolted Flange

Bolted flanged connections are used extensively in the petrochemical and nuclear industries. Under high temperatures, their leakage tightness behavior is compromised due to the loss of load as a result of creep of not only the gasket material but also the bolt and the flange materials. The relaxation of the bolt load and the corresponding loss of the gasket contact stress are not easy to assess analytically and consequently there is no established design calculation procedure. The objective of this paper is to present an analytical method that is part of the SuperFlange program [1] and is capable of predicting the load relaxation in a bolted joint when subjected to flange, bolt and gasket creep. The proposed method is validated by comparison with 3D FE models of different size flanges. In some cases, the relaxation caused by the flange and bolt materials is shown to be significant.

scholarly journals Investigation of heat exchange in a blown dense layer of granular materials

2017 ◽  
Vol 5 (8 (89)) ◽  
pp. 58-64
Author(s):  
Antonina Solodka ◽  
Natalya Volgusheva ◽  
Irina Boshkova ◽  
Alexandr Titlov ◽  
Andrey Rozhentsev
Keyword(s):  
Heat Exchange ◽  
Granular Materials ◽  
Dense Layer

Cellulose Acetate Reverse Osmosis Membrane Structure

1972 ◽  
Vol 30 ◽  
pp. 528-529
Author(s):  
H. K. Plummer ◽  
E. Eichen ◽  
C. D. Melvin
Keyword(s):  
Cellulose Acetate ◽  
Reverse Osmosis ◽  
Membrane Structure ◽  
Freeze Drying ◽  
Dense Layer ◽  
Water Removal ◽  
Reverse Osmosis Membrane ◽  
Correct Interpretation ◽  
Electron Image ◽  
Scanning Electron

Much of the work reported in the literature on cellulose acetate reverse osmosis membranes has raised new and important questions with regard to the dense or “active” layer of these membranes. Several thickness values and structures have been attributed to the dense layer. To ensure the correct interpretation of the cellulose acetate structure thirteen different preparative techniques have been used in this investigation. These thirteen methods included various combinations of water substitution, freeze drying, freeze sectioning, fracturing, embedding, and microtomy techniques with both transmission and scanning electron microscope observations.It was observed that several factors can cause a distortion of the structure during sample preparation. The most obvious problem of water removal can cause swelling, shrinking, and folds. Improper removal of embedding materials, when used, can cause a loss of electron image contrast and, or structure which could hinder interpretation.

Dissipation in granular materials

1998 ◽  
Vol 77 (5) ◽  
pp. 1413-1425 ◽  
Author(s):  
Dietrich E.Wolf, Farhang Radjai, Sabine Dipp
Keyword(s):  
Granular Materials

Mechanisms and kinetics of gravity separation of granular materials

2020 ◽  
Vol 63 (6) ◽  
pp. 545-561
Author(s):  
V N Dolgunin ◽  
A N Kudi ◽  
M A Tuev
Keyword(s):  
Granular Materials ◽  
Gravity Separation ◽  
Kinetics Of

Toward the Analysis of the Structure of Granular Materials

2013 ◽  
Vol 58 (1) ◽  
pp. 32-39
Author(s):  
O.I. Gerasymov ◽  
◽  
A.G. Zagorodny ◽  
M.M. Somov ◽  
◽  
...  
Keyword(s):  
Granular Materials
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