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A new method to determine the characteristic lengths of composite joints without testing

机译：无需测试即可确定复合材料接头特征长度的新方法

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摘要

A numerical method is presented to determine the characteristic lengths for the failure analysis of composite joints without characteristic length tests. In the conventional methods, compressive characteristic length was determined from the result of a combined bearing test and finite element analysis. The present study, however, shows that the same compressive characteristic length can be obtained by numerical calculation without the bearing test. A new method to define the tensile characteristic length is also introduced so that the tensile characteristic length is numerically determined without the tensile test. Failure loads and modes based on the numerically calculated characteristic lengths are validated by the test results for composite joints with nine different geometries. Good agreement was found among the results of the present numerical method, the conventional method, and the test.
机译：提出了一种数值方法来确定复合材料接头失效分析的特征长度，而无需进行特征长度测试。在传统方法中，压缩特征长度是根据轴承测试和有限元分析相结合的结果确定的。但是，本研究表明，无需进行轴承试验，就可以通过数值计算获得相同的压缩特性长度。还介绍了一种定义拉伸特征长度的新方法，以便无需拉伸试验即可通过数值确定拉伸特征长度。基于具有9种不同几何形状的复合材料接头的测试结果验证了基于数值计算出的特征长度的破坏载荷和模式。在本数值方法，常规方法和试验的结果之间发现了很好的一致性。

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