A parametric cubic modelling system for general solids of composite material
A parametric cubic modelling system for general solids of composite material
复制标题
复合材料一般实体的参数立方建模系统
DOI：
10.1002/nme.1620110405
复制
发表时间：
1977
影响因子：
2.9
通讯作者：
T. F. Neu
中科院分区：
文献类型：
--
作者：
E. L. Stanton;L. M. Crain;T. F. Neu
本文提出了一种新的方法来模拟各向异性和非均匀的固体，并应用于复合材料结构。一个参数化的立方建模系统，提出了线，曲面，体积和物理数据，使用建设的背景下，生成数值数据。该系统可自动构建离散单元模型，并可将输入数据要求降低一个数量级以上。提出了一种不需要位移导数来定义连通性的三次等参离散元。这种单元能够在表面上精确地位移和应变连续，同时允许在异质材料界面处的应变不连续。元素的形状可以是任何六面体、五面体或四面体，并且允许材料属性随体积变化。评估建模误差与封闭形式的解决方案，弯曲的几何形状表明，一个单一的元素可以模拟高达90度段的应力精确到1%.Applications系统的复合材料结构层间边缘效应和附着应力在夹层板。
A new approach to modelling solids that are anisotropic and heterogeneous is presented with applications to structures of composite material. A parametric cubic modelling system is presented for lines, surfaces, volumes, and physical data that uses construction-in-context to generate numerical data. This system automates the construction of discrete element models and can reduce input data requirements by more than an order of magnitude. A tricubic isoparametric discrete element is presented that does not require displacement derivatives to define connectivity. This element is capable of exact displacement and strain continuity over a surface while permitting strain discontinuities at heterogeneous material interfaces. The shape of an element can be any hexahedron, pentahedron, or tetrahedron and the material properties are allowed to vary over the volume. Evaluation of modelling error with respect to closed-form solutions for curved geometries indicate a single element can model up to 90-degree segments with stresses accurate to 1 per cent. Applications of the system to composite structures are presented for interlaminar edge effects and attachment stresses in a sandwich panel.