基于有限元法功能梯度材料零件自适应切片算法

 快速原型制造技术采用分层和材料逐点或逐线堆积加工零件，适合加工每层内或每层间材料有变化的非均质材料零件。分层切片是快速原型制造中非常重要的组成部分，尤其自适应切片是保证零件成型质量和提高快速原型制造效率的有效手段。综合考虑几何信息和材料分布信息，针对基于有限元法的功能梯度材料零件模型几何和材料表达特点，以零件表面外法线，材料变化梯度及材料分辨率为计算层片厚度的依据，对功能梯度材料零件快速原型制造中的自适应切片算法进行了研究。最后给出了分层实例，验证算法的正确性。

Adaptive Slicing Algorithm of Functionally Graded Material Component Based on Finite Element Method

Rapid prototyping technology involves layered manufacturing and deposition of material on a point fashion or a line wise fashion to manufacture components, and is specially suited to manufacture the heterogeneous components in which the material varies in one layer and between two layers. Slicing is a very important procedure in rapid prototyping, and especially the adaptive slicing is the effective means which guarantees the quality of components molding and improve the efficiency of rapid prototyping manufacturing. An adaptive slicing algorithm is presented considering the characteristics of the geometry and material expression of the functionally graded material component model based on finite element method. The algorithm is studied by considering both geometry information and material distribution information. The layer thickness is computed according to the normal direction of component’s external surface, the gradient of material distribution and material resolution. Finally, an example is presented to verify the algorithm validity.