1986•Defense Technical Information Center (DTIC)Requires access
Advanced Durability Analysis. Volume 3. Fractographic Test Data
D. E. Gordon, Kirschner, S. B., Brubaker, L. E., K. M. Koepsel, Shannon D. Manning
Open publisher page 0 citations
Abstract
This report contains the test results and raw fractographic data for over 180 fatigue cracks. Natural fatigue cracks were acquired in fastener holes in 7475-T7351 aluminum. Three specimen fastener hole configurations were considered: (1) open hole, (2) bolt-in-hole(passive), and (3) bolt load transfer. Both straight-bore and countersunk fastener holes were considered. Strain survey results for a double-reversed dog-bone specimen(designed for 15% bolt load transfer) are presented. The fractographic data in this report can be used to quantify the initial fatigue quality or equivalent initial flaw SIZE(EIFS) cumulative distribution for clearance-fit fastener holes. These data can be used to determine the initial flaw size for the durability and damage tolerance analyses of mechanically fastened joints.