基于快速成型技术的梯度材料设计与制造理论和方法

Based on the research and development of functionally gradient materials,a brand new concept,Ideal Functional Material Component(IFMC),is presented in this project.IFMC is designed with best functional use,and is constructed by continuously vary material composition,microstructure,non-homogeneous materials and homogeneous materials.According to layered manufacturing technology,an appropriate and furthermore innovative theory and technique is proposed for the Digital Concurrent design and Manufacturing of IFMC and forms the key point of this project.Applying uniformitarianism and non-manifold geometric model,the faced-based non-manifold geometric model,the parameterized microstructure and the function modeling to present the information of geometric and material are presented.By regarding all the h omogeneous material,composite,functionally gradient material and functional meso-structure as periodic meso-structure and based on the simplex subdivision of IFMC,a digital scheme for material information representation of IFMC is developed and is proved to be feasible and effective.A designing procedure of IFMC that consist of function designing and material designing,a RPM based manufacturing technoloy for IFMC are put forward.Combining with CAD model,an adaptive slicing algorithm is developed which considered the information of geometry and material.The algorithm which calculate the thickness of layers according to the local grade of the material and the normal direction of extenal face,had been proved.meanwhile,a new prototype of multi-material jet RPM machine is under development.

运用摄动理论、微分流形、拓扑优化、有限元数值方法和分层制造技术等理论，研究非均质材料的典型的参数化细结构形式库、细观结构形式和材料宏观性质的关系、基于微分流形思想的非均质材料零件的CAD模型及其分层制造的前处理算法，发展出三维梯度材料设计与制斓囊话憷砺酆头椒ǎ迪秩嗣浅て谝岳吹摹鞍戳ρ阅芾瓷杓菩虏牧稀钡纳柘搿