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复合材料第二相晶粒轮廓的非均匀B样条表示
作者:赵秀阳 尹衍升 杨波 董吉文  
单位:山东大学工程陶瓷山东省重点实验室 中国海洋大学材料学院 武汉理工大学材料复合新技术国家重点实验室 武汉理工大学材料复合新技术国家重点实验室 济南250061 山东青岛266003 山东大学工程陶瓷山东省重点实验室 济南250061 武汉430070 武汉430070 
关键词:复合材料  B样条  特征点  控制点  轮廓 
分类号:TB332
出版年,卷(期):页码:2005,33(12):1464-1467
DOI:
摘要:
在利用小波变换技术和边缘连接技术得到的陶瓷复合材料晶粒闭合边缘的基础上,根据晶粒轮廓的特点,研究了其特征型值点的合理提取方法。在此基础上,运用非均匀3次B样条曲线对晶粒轮廓进行了插值处理:对特征型值点进行累加弦长参数化,确定节点矢量,并反算出控制点,根据De Boor法得到B样条曲线上的值,形成数学语言描述的轮廓。最后研究了Fe3Al含量为40%体积分数的FeAl ZrO2复合材料在1250℃热蚀后的扫描电子显微镜图像,以VC++.Net为研究平台,选取一个第二相Fe3Al晶粒为研究对象,依据提出的算法得到晶粒轮廓的矢量化表示。
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The important role of contour factorization in the 3-dimensional reconstruction of composite is discussed. Based on the closed contour of a ceramic composite grain obtained by using the wavelet and edge linking techniques, a reasonable acquired method for the value of the characteristic points of the material grain contour was investigated according to the contour′s curvature. A novel representation of material grain contour was proposed by using the non-uniform cubic Bspline curve interpolation to form a mathematically described contour. The algorithm includes four steps: accumulate the chord length parameterized characteristic points; decide the knot vector; calculate the control vertex and calculate the points on the Bspline curve by the De Boor method. The structure of the FeAlZrO_ 2 composite (40% volume fraction of Fe_ 3 Al) thermal etched at 1250℃ was investigated by scanning electron microscopy. Choosing an Fe_ 3 Al grain as the research objective, the factorization representation of a grain contour was obtained on a VC++. Net platform.
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基金项目:
国家自然科学基金(NO.50242008)资助项目。~~
作者简介:
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