Three-dimensional Reconstruction And Quantitative Analysis Of Metallic Fracture Surface

Analysis of fracture surface is the most popular tool in the field of fracture analysis, it became the focus of fracture surface research areas to analyze the fracture surface by computer software. The three-dimensional reconstruction technique and quantitative analysis of metal fracture surface is a further research on the analyzing of fracture surface, it can supply all the three-dimensional space geometry data of metal fracture surface, and it provides a base for quantitative analysis of fracture surface.There were several ways to reconstruct the three-dimensional fracture surface in the past, it is very difficult for stereovision principle to reconstruct the real fracture surface from overlapped area of projection of surface in terms of two-dimensional image of fracture surface , however, serial section reconstruction principle can get through this restriction, and get the more precise reconstruction results. The recognition and classification of metal fracture surface were finished by image processing without other criterion in the past, the fracture surface shape characteristics is the characterization of special fracture behavior.In light of the serial cross-sections reconstruction principle, based on the technique of image processing and three-dimensional data sets visualization, this paper develops a software independently ,which is used to reconstruct metallic fracture surface. This software can solve a serial of fracture sample cross-section pictures which was taken by optical microscope, and do a serial of operation, for example, acquirement of the contour characteristics of two-dimensional fracture surface section, the geometric correction of fracture surface' 3D vector, interpolation of contour data , the filtration of 3D vector of fracture surface and the combination of 3D vector of fracture surface, and then the precise data was get . 3D vector of fracture surface was reconstructed by visualization module, so the results of reconstruction of fracture surface was finished, and the local area of fracture surface was quantitatively visualized by the quantitative analysis module.The result of reconstruction and the real fracture surface are proved to be basically consistent by their comparison, the reconstruction is proved to be high precise by the examination between the reconstruction and 3D vector of fracture surface. The quantitatively visualization of local area of fracture surface conforms to fracture surface shape characteristics, because quantitatively visualization is tested, the quantitative measurement of fracture surface can supply the space geometry data of fracture morphology.The results prove that, it can guarantee the 3D vector of fracture surface precise to reconstruct the fracture surface by serial cross-sections reconstruction principle, it is a good reconstruction method if we want to get high precise 3D vector of fracture surface. We find that fracture surface shape characteristics is similar to space geometry characteristics in the procedure of quantitative analysis of fracture surface . we can describe the fracture morphology by quantitative visualization and quantitative measurement of fracture surface, the intelligent study of fracture morphology is of certain significance for fracture analysis.All research works are based on an independent development software environment of three-dimensional reconstruction and quantitative analysis of fracture surface. It established solid foundation for the further metal intelligent research of fracture.