3D Reconstruction And Finite Element Analysis Of Mechanical Properties For Composite

The key assignment of composite micro-mechanics is to build the quantitative relation of various macro-performance and the microstructure. Traditionally simplified unit cell models based on the finite element analysis have been used to resolve micro-mechanics problems such as the prediction of the onset and growth of evolving damage in composite materials. While these models provide valuable insights into the microstructural processes, simple morphologies idealize actual microstructures for many engineering materials that bear little relationship to the actual stereographic features. However, for complicated composite, many work has shown that traditionally unit cell models tend to give unsatisfactory predictions for the mechanical response of particle reinforced materials. It is the central precept of materials science that microstructure influences the properties and performance of materials. For composite materials, the degree of property enhancement depends on morphological factors such as volume fraction, size, shape and spatial distribution of the reinforcements, in addition to the constituent material and interface properties. With the development of computer science, direct observations of three-dimensional microstructure are of interest. For opaque materials, 3D reconstruction from serial sectioning has been used in the past to obtain information concerning three-dimensional microstructural geometry. Currently There are few special software aim to the 3D reconstruction of material science.The aim of this paper is to study the key technologies in the 3D reconstruction for composite are studied systemically, and predict the effective properties based on the true microstructure.The calculating result shows that the data calculated by the 3D microstructure model are more accurate than the datas acquired from 3D spherical particles model and analytical model.With the serial sectioning method, the serial images of particle reinforced metal matrix composites are acquired and the strain-stress curve of SiC/Al composite is obtained by trial.To solve the problem that only very limited field of view is available got when highly magnifying lens are used in microscopes, Image mosaic is processed to align the serial images. A novel method is adopted to mosaic two SiC/Al microscopic images to avoid the drawbacks of the classical methods. Feature points are extracted by using Harris corner detector and filtered through Canny edge detector. A 40 × 40 feature template is chosen by sowing a seed in the...