Effects of Bearing/Bypass Load Interaction on Laminate Strength.
Abstract
The subject of this program was structural evaluation of mechanically fastened composite joints. An add-on contract effort was performed to further evaluate the effects of bearing/bypass interaction on laminate strength. The results of the add-on contract are the subject of this report. The work performed under the original contract indicated additional studies were needed to further verify bolted composite joint strength methodology. The objective of this add on effort was evaluation of bearing versus bypass load interactions on laminate strength. Three laminates from the family of 0 deg, + or - 45 deg, and 90 deg ply orientations were tested to failure under a range of tension bypass to bearing load ratios. Predictions of laminate strength were obtained using the Bolted Joint Stress Field Model (BJSFM) described in Volumes 1 and 3 of AFWAL-TR-81-3041. Failure behavior of laminates was documented using ultrasonic C-scan techniques, and failure zones about the fastener hole were correlated with predictions. This report documents test procedures, test data, and theory/test correlations.
Document Details
- Document Type
- Technical Report
- Publication Date
- Sep 01, 1981
- Accession Number
- ADA108006
Entities
People
- Samuel P. Garbo
Organizations
- McDonnell Aircraft Corporation