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高機能・構造複合材料の破壊解析

高性能/结构复合材料的断裂分析

基本信息

批准号：
16F16902
负责人：
金额：
$ 1.47万
依托单位：
Tokyo Institute of Technology
依托单位国家：
日本
项目类别：
Grant-in-Aid for JSPS Fellows
财政年份：
2016
资助国家：
日本
起止时间：
2016-07-27 至 2018-03-31
项目状态：
已结题

来源：
https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-16F16902/
关键词：
fracture mechanics Damage mechanics functional material Concrete Extended finite element Local mesh refinement Finite element analysis Structural mechanics

项目摘要

The complex heterogeneous nature of composites and concrete with suffering complicated processes of loading and environmental conditions additionally makes it highly difficult and burdensome in numerical prediction of progressive failure and damage. In a similar manner, accurate numerical modeling of imperfections/failure in polarized functional materials to some extent is quite challenging and often not trivial due to the anisotropic material behaviors and inherent coupling effect of different fields (electric, magnetic, mechanical, temperature, etc. The failure of structures and materials can arise during the manufacturing process or in-service. Such failure strongly affects the performance of structures and systems. The overriding objective of the applicant’s research has been to develop effective computational numerical methods in terms of enrichment, adaptivity, smeared approaches, and their variants for localized failure and instabilities of advanced functional composite materials and quasi-brittle materials (concrete). Research implementation and results have been obtained from this project can be stated as follows. We have developed the local enrichment techniques and the continuum damage models for modeling crack and damage problems of concrete, solids and advanced functional composites. We also have developed the local mesh refinement extended finite element method for fracture problems. Obtained results have been published in the professional scientific journals and have been presented at various professional conferences.

复合材料和混凝土的复杂非均匀性以及复杂的加载过程和环境条件使得渐进破坏和损伤的数值预测非常困难和繁重。以类似的方式，在一定程度上极化功能材料的缺陷/故障的精确数值建模是相当具有挑战性的，往往不是微不足道的，由于各向异性的材料行为和不同的领域（电，磁，机械，温度等）的固有耦合效应的结构和材料的故障可能会出现在制造过程中或在服务。这种失效严重影响结构和系统的性能。申请人的研究的首要目标是开发有效的计算数值方法的富集，自适应性，涂抹的方法，以及它们的变体的局部故障和先进的功能复合材料和准脆性材料（混凝土）的不稳定性。本项目的研究实施和取得的成果如下。我们发展了局部富集技术和连续损伤模型，用于模拟混凝土、固体和先进功能复合材料的裂纹和损伤问题。我们还发展了断裂问题的局部网格加密扩展有限元法。所取得的成果已在专业科学期刊上发表，并在各种专业会议上作了介绍。