A Numerical Method to Determine the Characteristic Lengths of Composite Joints

摘要

A numerical method is presented to determine the characteristic lengths for the failure analysis of composite joints without testing. 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 analysis 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. Results of the analysis based on the numerically calculated characteristic lengths are verified by the test results for composite joints. Good agreement was found among the results of the present numerical method, the conventional method, and the test.