Hierarchical Material Model Integrating Multi-Scale Phenomena in Composites

提出了一种基于微观结构信息的自适应、尺度不变的材料模型的开发和验证，该模型将有效地解释复合材料固有的材料和力学行为。我们的方法包括：(A)引入一个自适应的分层和多尺度计算模型，结合图像分析来关联计算预测；(B)基于单元格方法纳入建筑灵活性；(C)使用连接微观到宏观尺度的独立状态变量；以及(D)通过内聚元素来考虑界面机制。(B)在工业研究领域，该方案将影响许多行业，这些行业在微观特征和宏观行为方面的重大进展往往因缺乏微观影响的知识和不知道如何在规模之间架起桥梁而受到阻碍。

Development and validation of an adaptive, scale invariant materials model, based on microstructuralinformation that will efficiently account for the material and mechanical behaviors inherent incomposites, is proposed. Our approach involves: (a) Introduction of an adaptive hierarchical and multi-scalecomputational model, incorporating image analysis to correlate computational predictions; (b)Incorporation of architectural flexibility based on Unit Cell approach; (c) Utilization of Independent StateVariables that bridge the micro-to-macro scales; and (d) Account of interfacial mechanisms throughcohesive elements. The intellectual merit relies on the creation of an interdisciplinary program to tailorcomputational and fundamental material science, that will ultimately provide the underpinnings forunderstanding the mechanics of reinforced structures such as woven, bio, and nanocomposites. BroaderImpact: In the area of basic research and education the innovative and comprehensive approach taken bythis work will promote other research on composite materials aimed at developing a unified, scaleinvariant model for FRPCs. (B) In the area of industrial research, this program will affect a wide varietyof industries where significant gains in microscopic characterization and macroscopic behavior is oftenstymied by lack of knowledge of micro effects and ignorance of how to bridge the scales.