Structural Joints and Repairs: Bearing Fatigue Response in Bolted Hybrid Composite Joints

Authors

John S. Brewer, Air Force Institute of Technology
Anthony N. Palazotto, Air Force Institute of Technology
Casey Holycross, Air Force Research Laboratory
Michael Gran, Air Force Research Laboratory

Document Type

Conference Proceeding

Publication Date

1-2021

Abstract

This study sought to characterize the bolted bearing fatigue performance and fatigue failure characteristics of a hybrid composite material created by the insertion of 301 stainless steel foils in a composite layup composed of IM7/977-3 preimpregnated unidirectional carbon fiber. The hybrid layup was adapted from a conventional composite layup, and the hybrid and control are compared in double shear and single shear configurations using an accelerated fatigue step test method. The hybrid demonstrates an increase in fatigue limit load of 26% over the control in double shear and 36% in single shear. Methods, results, and statistical analysis are presented. Micrographs of sectioned samples are presented and compared to failure observed in quasi-static samples.

Comments

This conference paper is available from AIAA via subscription or purchase through the DOI link below.

This work was awarded "Best Paper" at the AIAA Scitech 2021 Forum. The conference occurred virtually online.

DOI

10.2514/6.2021-1402

Source Publication

AIAA Scitech 2021 Forum

Recommended Citation

Brewer, John S, Anthony N Palazotto, Casey Holycross, and Michael Gran. “Structural Joints and Repairs: Bearing Fatigue Response in Bolted Hybrid Composite Joints.” In AIAA Scitech 2021 Forum, Session: Structural Joints and Repairs:AIAA 2021-1402. Virtual: American Institute of Aeronautics and Astronautics, 2021. https://doi.org/10.2514/6.2021-1402.