功能性微结构可控参数建模技术研究

Research on Controllable Parameter Modeling Technology of Functional Microstructures

针对多孔结构功能一体化材料设计困难的问题,提出了一种由复合函数驱动的大规模微结构自动化建模技术。通过函数驱动生成三组平行于三轴方向的微结构基本单元,并借助集合论定义的交、并集操作对其进行组合,通过对生成的规则微结构进行仿射、弯曲算子操作,能使其获得一定的复杂曲面适形效果。对胞元节点处形成的自然圆角过渡进行了分析,相对于直接过渡、球体过渡这两种节点处理方式,自然圆角过渡的胞元力学性能分别提高了43.6%和27.9%。将3个变阶数圆形截面微结构填充于旋翼截面模型内部,通过计算3个变阶数旋翼模型在指定的10个采样点处的刚度值以得到模型的节点刚度曲线,研究结果表明:通过调控微结构的分布阶数可以改变模型的刚度分布。

Aiming at the problems of difficulty in porous structural-functional integration material design,a large-scale microstructure automatic modeling technology driven by composite functions was proposed.Three groups of microstructure basic units parallel to the three-axis directions were generated by function-driven,which were combined by intersection and union operations defined by set theory.By performing affine and bending operator operations on the generated regular microstructures,a certain conformal effect iveness of complex surfaces might be obtained.The natural fillet transition formed at cell nodes was analyzed,compared with the two node processing methods of direct transition and sphere transition,the mechanics properties of the cells by natural fillet transition are increased by 43.6%and 27.9%,respectively.The circular cross-section microstructures of three different orders were filled into the rotor section model,and the node stiffness curves of the model were obtained by calculating the stiffness values of the three variable-order rotor models at the specified ten sampling points.The results show that the stiffness distribution of the model may be changed by adjusting the distribution orders of the microstructures.