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为表达生物材料的非均质性,提出基于材料特征的非均质实体模型。材料特征作为设计意图的高层抽象,用以表达实体某一特定子区域的材料分布。材料特征通过材料组分分布函数来表达,讨论了材料组分分布函数的定义、形式和定义域。提出材料特征的三层模型,并对材料特征进行了分类,讨论了特征对应的函数表达式和定义域等要素。借助开放源码的图形核心VTK(V isua lization T oo lK it)实现了一个原型建模系统,系统继承了特征建模的优点,使设计者可以根据设计规则、功能需求直观地设计实体内部的材料梯度。
In order to express the heterogeneity of biomaterials, a heterogeneous solid model based on material characteristics was proposed. Material Features As a high-level abstraction of the design intent, it is used to express the material distribution in a particular sub-region of an entity. The material features are expressed by the material component distribution function, and the definition, form and domain of the material component distribution function are discussed. The three-layer model of material features is proposed, and the material features are classified. The elements such as the function expression and domain corresponding to the features are discussed. With the open source graphics core VTK (Vaseua lization T o lk it) a prototyping system has been implemented that inherits the benefits of feature modeling, allowing designers to intuitively design materials within the entity based on design rules and functional requirements gradient.