scholarly journals Empirical Formula for Wave Runup of Rubble-Mound Structure Covered by Tetrapods: Effects of Front Slope and Armour Layer Thickness

2015 ◽  
Vol 35 (5) ◽  
pp. 1051-1059
Author(s):  
Jong-In Lee ◽  
Il-Ro Bae
Keyword(s):  
Layer Thickness ◽  
Empirical Formula ◽  
Wave Runup ◽  
Mound Structure ◽  
Rubble Mound

Elastohydrodynamic Lubrication of Soft-Layered Solids at Elliptical Contacts: Part 2: Film Thickness Analysis

1994 ◽  
Vol 208 (1) ◽  
pp. 43-52 ◽  
Author(s):  
D Dowson ◽  
J Q Yao
Keyword(s):  
Film Thickness ◽  
Layer Thickness ◽  
Empirical Formula ◽  
Elastic Layer ◽  
Elastohydrodynamic Lubrication ◽  
The Body ◽  
Successive Overrelaxation ◽  
Synovial Joints ◽  
Load Carrying

This paper reports on the use of the Newton successive overrelaxation method to solve problems of elastohydrodynamic lubrication of soft-layered solids at elliptical contacts. Solutions have been obtained for a range of load, speed, elastic layer thickness and conjunction ellipticity, enabling the film thickness to be determined. The empirical formula thus derived is used to estimate the effective film thickness in the major load-carrying synovial joints in the body.

scholarly journals Investigation on the Reflection Coefficient for Seawalls Protected by a Rubble Mound Structure

2021 ◽  
Vol 9 (9) ◽  
pp. 937
Author(s):  
Luigi Pratola ◽  
Antonio Rinaldi ◽  
Matteo Gianluca Molfetta ◽  
Maria Francesca Bruno ◽  
Davide Pasquali ◽  
...  
Keyword(s):  
Reflection Coefficient ◽  
Wave Reflection ◽  
Experimental Tests ◽  
Coastal Protection ◽  
Empirical Formulas ◽  
New Approach ◽  
Wave Flume ◽  
Mound Structure ◽  
Rubble Mound ◽  
Rubble Mound Breakwaters

Sea wave reflection from coastal protection structures is one of the main issues in the coastal design process. Several empirical formulas have been proposed so far to predict reflection coefficient from rubble mound breakwaters and smooth slopes. The aim of this study is to investigate wave reflection from a rubble mound structure placed in front of a vertical concrete seawall. Several experimental tests were performed on a two-dimensional wave flume by reproducing on a rubble mound structure with a steep single primary layer armored with a novel artificial unit. A new approach for the prediction of the reflection coefficient based on dimensional analysis is also proposed, and a new empirical equation is derived. The performance of the proposed equation was compared with widespread existing formulas, and a good accuracy was found.

MODELING OF MODELS ON FAILURE MODES OF CAISSON - RUBBLE MOUND STRUCTURE IN 1G FIELD TESTS

2021 ◽  
Vol 77 (2) ◽  
pp. I_769-I_774
Author(s):  
Tatsuya MATSUDA ◽  
Tatsuya UEDA ◽  
Kentaro TAMURA ◽  
Naoto NAITO ◽  
Naoki KUWABARA ◽  
...  
Keyword(s):  
Failure Modes ◽  
Field Tests ◽  
Mound Structure ◽  
Rubble Mound

Structure and Orientation of As Precipitates in LT-MBE Grown GaAs

1991 ◽  
Vol 49 ◽  
pp. 900-901 ◽  
Author(s):  
Alain Claverie ◽  
Zuzanna Liliental-Weber
Keyword(s):  
Transport Properties ◽  
Layer Thickness ◽  
Growth Temperature ◽  
Low Temperatures ◽  
Lattice Parameter ◽  
Crystalline Quality ◽  
Insulating Properties ◽  
Lt Gaas

GaAs layers grown by MBE at low temperatures (in the 200°C range, LT-GaAs) have been reported to have very interesting electronic and transport properties. Previous studies have shown that, before annealing, the crystalline quality of the layers is related to the growth temperature. Lowering the temperature or increasing the layer thickness generally results in some columnar polycrystalline growth. For the best “temperature-thickness” combinations, the layers may be very As rich (up to 1.25%) resulting in an up to 0.15% increase of the lattice parameter, consistent with the excess As. Only after annealing are the technologically important semi-insulating properties of these layers observed. When annealed in As atmosphere at about 600°C a decrease of the lattice parameter to the substrate value is observed. TEM studies show formation of precipitates which are supposed to be As related since the average As concentration remains almost unchanged upon annealing.

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