基于三维隐式曲面重构及演化的水泥水化微结构演变仿真

项目名称： 基于三维隐式曲面重构及演化的水泥水化微结构演变仿真

项目编号： No.60873089

项目类型： 面上项目

立项/批准年度： 2009

项目学科： 生物科学

项目作者： 杨波

作者单位： 济南大学

项目金额： 30万元

中文摘要： 水泥水化微结构演化的计算机三维模拟是揭示水泥水化过程的有效手段。利用欧洲同步辐射加速中心（ESRF）的ID19 Beamline 获取水泥颗粒待演化时的序列图像；利用数字图像处理的方法获取图像中的水泥颗粒轮廓，基于序列轮廓，利用RBF 径向基函数重构水泥颗粒的真实隐式曲面，建立水泥水化的初始模型；利用水平集的方法，针对每个水泥颗粒数字曲面，将初始的隐式曲面一分为二，同时向内和向外的演化，向内演化的曲面描述因水泥颗粒溶解而缩小的未水化部分，向外演化的曲面描述水化产物沉积在水泥颗粒表面引起的固相体积膨胀。借助实验测定的水泥水化速率和水化动力学，描述水泥颗粒逐渐膨胀表面接触搭接、嵌入形成固相结构网络,孔隙的连通性逐渐降低的过程。最终在网络环境下形成一个可用的仿真原型。本项目将建立面向真实三维结构的水泥水化微结构演化的连续系统模型，为实现水泥材料的计算机辅助设计奠定坚实的理论基础。

中文关键词： 序列图像；隐式曲面；曲面演化；水泥水化

英文摘要： Three-dimension simulation is an efficient method to reveal the cement hydration process. The serial micrograph of the initial state of cement particle will be obtained by using ID19 beamline in the European Synchrotron Radiation Facility. The contours of cement particles will be obtained by means of image processing. Based on the serial contours and the implicit surface reconstructed using Radial Basis Function method,the initial hydration model of cement particles will be established. By using the level set method, every cement particle surface is split into two parts. The inner evolving part is used to depict the non-hydration part of the shrinked dissolving cement particle,and the outer evolving part is used to depict the hydration products deposited on the surface caused by solid-phase expansion. According to the cement hydrating rate measured by experiments and the cement hydration kinetics,the process of the gradual expansion of the cement particles,the forming of solid-state networks,the gradual reducing of the pore connectivity will be presented. A usable simulation prototype will be final established under a network-based parallel environment. A continuous system model facing on the real evolvement of three-dimensional microstructure of cement hydration will be built finally in this project. This model will establish a solid theoretical foundation for computer aided design of cement materials.

英文关键词： Serial micrograph; Implicit surface; Surface evolve; Cement hydration