基于STEP的多功能梯度材料信息融合方法

基于STEP实体模型提出了一种融合多功能梯度材料信息与几何信息的方法．通过选择参考特征井指定材料分布函数，将材料信息添加到面、壳等几何实体中，从而实现材料信息与几何信息的融合。通过截面轮廓内部各点的材料值与点到参考特征的距离的映射，得到层内的材料分布信息，从而实现功能梯度材料零件模型的分层处理．

An Approach of Integrating Functionally Gradient Material Information Based on STEP

In order to manufacture functionally gradient meterial objects, a CAD model is required that contains both geometry and material information. This paper presented an approach to model and represent functionally gradient material objects by integrating the material information along with the geometry/topology information based on STEP solid model. The user selects a reference feature and specifies material distribution functions in terms of distance functions. Thus the material information can be incorporated with the geometry information by attaching material distribution functions to reference feature entities as their properties. The material compositions of query points into the contour can also evaluated by computing the distances from query points to the reference feature in slicing functionally gradient material objects.