Experimental study on effect of surface vibration on micro textured surfaces with hydrophobic and hydrophilic materials

2017 ◽  
Vol 412 ◽  
pp. 45-51 ◽  
Author(s):  
Chun-Wei Yao ◽  
Chen-Ling Lai ◽  
Jorge L. Alvarado ◽  
Jiang Zhou ◽  
Kendrick T. Aung ◽  
...  
Keyword(s):  
Experimental Study ◽  
Textured Surfaces ◽  
Surface Vibration ◽  
Hydrophilic Materials ◽  
Effect Of Surface

FRICTIONAL PERFORMANCE OF DIMPLED TEXTURED SURFACES ON A FRICTIONAL PAIR: AN EXPERIMENTAL STUDY

2018 ◽  
Vol 8 (4) ◽  
pp. 18 ◽  
Author(s):  
G. VIGNESH ◽  
M. PRAKASH ◽  
SELVAM MILON D. ◽  
P. RAGUPATHI ◽  
◽  
...  
Keyword(s):  
Experimental Study ◽  
Frictional Pair ◽  
Textured Surfaces ◽  
Frictional Performance

Water Film Depth Prediction Model for Highly Textured Pavement Surface Drainage

2021 ◽  
pp. 036119812110363
Author(s):  
Alireza Pourhassan ◽  
Ahmed A. Gheni ◽  
Mohamed A. ElGawady
Keyword(s):  
Prediction Model ◽  
Water Film ◽  
Crumb Rubber ◽  
Surface Material ◽  
Textured Surfaces ◽  
Road Traffic Safety ◽  
Material Type ◽  
Chip Seal ◽  
On Chip ◽  
Effect Of Surface

Water film depth (WFD) is an important factor for road traffic safety because of its direct connection with skid resistance, hydroplaning speed, and the tendency of splash and spray. Increasing the pavement macrotexture reduces WFD. However, existing models for WFD prediction have not been developed on highly textured surfaces such as chip seal. Furthermore, the rainfall intensities used for developing most of these models were relatively low, leaving no or low WFD on chip seal surfaces. To propose a WFD prediction model suitable for highly textured surfaces and to consider the effect of surface material type, an experimental study was conducted with 154 different combinations of mean texture depth (MTD), surface material type, surface slope, drainage length, and rainfall intensity. The tests were carried out on chip seal specimens using a full-scale rainfall simulator. Test results from 1,784 WFD readings indicated that the Gallaway and PAVDRN models were not accurate for highly textured surfaces used in this study with MTD ranging from 0.05 to 0.20 in. Two experimental models were, therefore, proposed to predict the WFD; both models displayed a significantly higher correlation between the measured and predicted WFD compared with the existing models. Furthermore, the eco-friendly rubberized chip seal showed an enhanced drainage capability compared with conventional chip seal, especially in low slopes, because of the hydrophobic nature of crumb rubber versus the hydrophilic character of mineral aggregates. Accordingly, the proposed model incorporated a term to consider the effect of surface material type.

scholarly journals An Experimental Study on the Effect of Surface Texture on Contact Stiffness Using Soft Material

2018 ◽  
Vol 217 ◽  
pp. 02005
Author(s):  
Z. Fuadi
Keyword(s):  
Surface Texture ◽  
Normal Load ◽  
Contact Stiffness ◽  
Soft Material ◽  
Contact Dynamics ◽  
Real Contact Area ◽  
Textured Surfaces ◽  
Indentation Force ◽  
Result Show ◽  
Effect Of Surface

Contact interface is one of the most important factors in a mechanical contact because it is the place where friction, sound, and heat originate. It is therefore inevitable that modeling various phenomenon related to contact dynamics requires a proper representation of the contact interfaces. One of the methods in representing the behavior of two surfaces in contact is by using the parameter of contact stiffness. In this study, the effect of surface texture on contact stiffness is analyzed. the texture was used in order to reduce the randomness of surface roughness. the soft material was chosen to achieve a pure elastic contact thus preventing plastic deformation to the asperities. the analysis was conducted by using an indentation method employing a steel ball with a relatively small indentation force. the result show contact stiffness values of the textured surfaces were smaller than that of smooth surface. This is particularly observed at low normal load at which total deformation of the surface is relatively small compared to the asperities height. This decrease in the contact stiffness value of the textured surfaces can be related to the reduction in the real contact area.

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