Title: Developing three-dimensional digital image correlation techniques to detect the surface smoothness of construction materials

Authors: Ming-Hsiang Shih; Wen-Pei Sung; Shih-Heng Tung; Darius Bacinskas; Gintaris Kaklauskas

Addresses: Department of Civil Engineering, National Chi Nan University, Nan-Tou 545, Taiwan. ' Department of Landscape Architecture, Integrated Research Center for Green Living Technologies, National Chin-Yi University of Technology, Taichung 411, Taiwan. ' Department of Civil and Environmental Engineering, National University of Kaohsiung, Kaohsiung 811, Taiwan. ' Department of Bridges and Special Structures, Vilnius Gediminas Technical University (VGTU), Sauletekio ave. 11, Vilnius, LT-10223, Lithuania. ' Department of Bridges and Special Structures, Vilnius Gediminas Technical University (VGTU), Sauletekio ave. 11, Vilnius, LT-10223, Lithuania

Abstract: A low-cost three-dimensional digital image correlation coefficient method, 3-D DIC equipped with one advanced digital camera and high-speed computer to detect the flatness of plaster of Paris casts is proposed in this research. The test and analysis results show that this proposed method can easily reveal the rugged surface of plaster cast. No matter what the absolute displacement, rotate on z-axis, strain on z-axis and von Mises strain of analysis results are extremely close to the real situation of this test sample. Then, the joint roughness coefficient (JRC) is used to compare the test results of 3-D DIC with the test results of laser scanner. These results indicate that the JRC values measured by laser scanner are very similar to that measured by 3-D DIC. Therefore, the accuracy degree of this 3-D DIC method is high enough for applying it to achieve the three-dimensional surface smoothness of construction material.

Keywords: 3D image correlation; digital image correlation; surface smoothness; joint roughness coefficient; digital images; plaster of Paris casts; cast flatness; plaster casts; surface roughness; surface quality; laser scanning.

DOI: 10.1504/IJMPT.2011.045467

International Journal of Materials and Product Technology, 2011 Vol.42 No.3/4, pp.234 - 246

Received: 08 Mar 2011
Accepted: 25 Nov 2011
Published online: 07 Mar 2015 *

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