| Citation: | ZHOU Yong, XUE Bin, GUO Yunxin, et al. An algorithm for generating geometric models of microscopic specimens of PVC foam based on μCT images[J]. Journal of Beijing University of Aeronautics and Astronautics, 2022, 48(6): 968-978. doi: 10.13700/j.bh.1001-5965.2020.0726(in Chinese)
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In numerical simulation of foam microstructure, the geometric characteristics and arrangement of foam cavities have an important influence on calculation efficiency and calculation results. We propose a new algorithm, based on the advancing surface search geometric construction algorithm and the Laguerre partition algorithm, to generate the geometric model of the PVC foam microscopic specimen. First, reconstruct the authentic geometric model of the foam from μCT scan image, and measure the geometric characteristics of the foam cavity and the volume distribution pattern. Then, convert the measured foam cavity volume into a sphere, and put it into the space through the advancing surface search geometric construction algorithm. Finally, divide the space sphere into regions by means of Laguerre division, and assign wall thickness parameters to form a geometric model of the microstructure. The established model is in good agreement with the actual material in terms of micro-geometric characteristics.
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