Abstract. As an extension to existing work on crack detection and subpixel accuracy width determination as a tool for civil engineering material testing, the paper shows algorithmic approach handle widening cracks with relative rotations between related borders. In first time step under zero-load, set of points be tracked through consecutive frames image sequence is defined. Then, subpixel-prec...

The presence of concrete cracks in structures indicates possible structural deterioration, but it is quite difficult to measure crack width accurately. While much research has been conducted on detection using image processing, there a gap the accurate quantification millimeters. Current methods either pixels or require attachment scales markers onto measured surface, which can pose safety haza...

A new binarization method for crack detection in road surface image is proposed. A road surface image is consist of high frequency textures due to it's rough surface and some cracks which can have wide variation of it's form, depth, width and direction. So it is dicult to nd threshold value to discriminate a background and a crack region by conventional methods based on gray level histgram. As ...

A transition from surface-roughening collapse to a random network collapse has been investigated in fatty acid Langmuir monolayers. In contrast to the random network crack pattern, the surface-roughening crack pattern grows on a much longer time scale and on a much shorter length scale. A change in the isotherm from a surface pressure "spike" to a "plateau" occurs at the transition. In the surf...

This paper presents an experimental study on the monotonic and fatigue behavior of a link slab designed for a durable concrete bridge deck system. The requirements on the link slab in terms of material properties, dimensions, and reinforcement detailing are considered. Special focus is placed on the deflection capacity of the link slab and its fatigue performance. This paper discusses the choic...