Abstract:In order to improve the efficiency and accuracy of fixture design and to promote the standardization of design, this paper summarizes the design and manufacture of compression test fixture for composite bypass compression test in ASTM standard. The CATIA secondary development method including Model Based Definition (MBD) information is employed. A parametric design method of composite by-pass compression test fixture is proposed. This realizes the rapid and accurate establishment of assembly model of test fixture with design and manufacturing information. The results show that the key dimension chain parameters of the test fixture assembly with design and manufacturing information are the diameter D and width W of the test piece. The test fixture designed by this study meets the requirements of accuracy and standardization of fixture design related to allowable value test standard for composite materials specified in ASTM and it shortens the design cycle.