A frictionless contact problem for two elastic layers supported by a Winkler foundation

2003 ◽  
Vol 15 (3) ◽  
pp. 331-344 ◽  
Author(s):  
Ahmet Birinci ◽  
Ragip Erdol
Keyword(s):  
Contact Problem ◽  
Winkler Foundation ◽  
Frictionless Contact ◽  
Elastic Layers

DIPLOBACK: Neural-Network-Based Backcalculation Program for Composite Pavements

1997 ◽  
Vol 1570 (1) ◽  
pp. 143-150 ◽  
Author(s):  
Lev Khazanovich ◽  
Jeffery Roesler
Keyword(s):  
Neural Network ◽  
Winkler Foundation ◽  
Multilayer Composite ◽  
Falling Weight Deflectometer ◽  
Subgrade Reaction ◽  
Elastic Parameters ◽  
The Neural Networks ◽  
Elastic Layers ◽  
Falling Weight ◽  
Moduli Of Elasticity

A neural-network-based backcalculation procedure is developed for multilayer composite pavement systems. The constructed layers are modeled as compressible elastic layers, whereas the subgrade is modeled as a Winkler foundation. The neural networks are trained to find moduli of elasticity of the constructed layers and a coefficient of subgrade reaction to accurately match a measured deflection profile. The method was verified by theoretically generated deflection profiles and falling weight deflectometer data measurements conducted at Edmonton Municipal Airport, Canada. For the theoretical deflection basins, the results of backcalculation were compared with actual elastic parameters, and excellent agreement was observed. The results of backcalculation using field test data were compared with the results obtained using WESDEF. Similar trends were observed for elastic parameters of all the pavement layers. The backcalculation procedure is implemented in a computer program called DIPLOBACK.

A dynamic frictionless contact problem using signorini like compliance laws

1997 ◽  
Vol 35 (12-13) ◽  
pp. 1245-1260
Author(s):  
G. Bayada ◽  
M. Chambat ◽  
A. Lakhal ◽  
L. Rochet
Keyword(s):  
Contact Problem ◽  
Frictionless Contact
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