Latest Advancements of the Bridging Model Theory
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摘要: 欲根据组分材料——纤维和基体性能参数预报复合材料的强度,必须解决3个方面的问题.首先,必须准确计算出纤维和基体中的内应力;其次,必须基于这些内应力,建立起复合材料的有效破坏判据,即细观力学强度理论;最后,必须根据独立测试的基体性能,准确定义其现场强度输入数据,因为后者无法测量.复合材料强度预报之所以困难,在于所涉及的每一个问题都极具挑战.由黄争鸣创建和发展的桥联理论,系统给出了这3方面问题的有效解决方案.该文简要介绍这些解决方案,包括桥联理论的最新进展及有待进一步研究的课题.Abstract: In order to predict the strength of a composite only based on the mechanical properties of its constituent fiber and matrix materials measured independently, 3 challenging problems must be resolved with high success rate. First, internal stresses in the fiber and matrix must be accurately evaluated. Second, efficient failure detection of the composite in terms of the internal stresses, i.e., the micromechanical strength theory, must be achieved. Last but not the least, the input data of in-situ strengths of the matrix, which can hardly be measured through experiments, must be correctly determined according to its original counterparts available independently. Each of these problems is by no means easy to deal with. This is why the prediction of composite strength is extremely difficult. The bridging model, originally established by HUANG Zheng-ming and further developed to a powerful theory, presents a systematic approach towards solving all of the 3 problems. This paper briefly summarizes the theory by focusing on some of the latest advancements. A number of further research topics are also highlighted in the paper.
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