复合材料层合结构分层仿真的有限元分析新模式及其软件开发

The delaminating damage simulation is a great challenge to the design and analysis of the composite laminated structures. In the software development of the delaminating damage simulation, the existed structure analysis software platform is used. Some new finite element methods are developed in the project to deal with the composite laminated structures, the mixed sub-region of the notched entities, and the interface regions. .The project is also focused on the high-precision and high-performance element models based on the analytical trial functions. In order to use those models to calculate the composite laminated structures, some new elements of the laminated plates, the laminated entities and the delaminated entities are developed respectively. The challenges in the calculation of interlamination stresses and boundary effect phenomenon in composite laminated plates are expected to be solved. In addition, the delaminating damage simulation models are expected to be integrated into the general design software platform. Then the same geometric model can be transformed into various finite element models. Those finite element models for each delaminating damage simulation stages will be unified into the professional software of the delaminating damage simulation. It can service related industries of our state..The project makes the best use of the existing software platforms and the old research achievements. By solving some key challenges in the delaminating damage simulation, the achievements of the project will be integrated into one professional software platform of the delaminating damage simulation in the composite laminated structures.

复合材料层合结构的分层仿真在设计和分析中是一大难点，针对分层仿真软件开发的特殊要求，本项目在已有软件平台的基础上，引入新型复合材料层合单元、含切口分区混合解析单元和新型界面单元，开发相关专业软件。.拟解决以下关键问题：在申请人已有成果的基础上，研究适合复合材料层合结构计算的高精度、高性能解析试函数单元模型，开发适用于不同分析目标的新型层合板壳、层合实体和分层实体解析型单元，重点突破复合材料层合板有限元计算中层间应力，边缘效应的难题；另外，在分层仿真模型中，构造同一几何模型向多种有限元分析模型转化的一体化设计新模式，形成适合分层仿真不同分析阶段统一的有限元模型自动生成软件平台，开发一套具有自主知识产权的复合材料层合结构分层仿真专业分析软件，服务国家相关行业。.该项目充分利用已有软件平台和科研积累，通过分层仿真中关键技术的开发，实现较完整复合材料层合结构分层仿真专业软件的集成。

复合材料层合结构的分层仿真在设计和分析中是一大难点，针对分层仿真软件开发的特殊要求，本项目在已有软件平台的基础上，引入新型复合材料层合单元、含切口分区混合解析单元和新型界面单元，开发相关专业软件。. 项目主要成果有：.1、研究了适合复合材料层合结构计算的高精度、高性能解析试函数单元模型；.2、开发了5种新型层合板壳、层合实体和分层实体解析型单元；.3、开发了复合材料层合板有限元计算中层间效应的等效弹簧元模型.4、提出了考虑边缘效应的难解析试函数单元模型； .5、构造了同一几何模型向多种有限元分析模型转化的一体化设计新模式；.6、形成了适合分层仿真不同分析阶段统一的有限元模型自动生成软件平台；.7、开发了一套具有自主知识产权的复合材料层合结构分层仿真专业分析软件ADGS。.