Flexural Fatigue Response of Repaired S2-Glass/Vinyl Ester Composites
Final rept. Dec 2005-Jan 2007
ARMY RESEARCH LAB ABERDEEN PROVING GROUND MD
Pagination or Media Count:
Vacuum-assisted resin transfer molding is a promising, affordable technique for producing composite integral armor CIA and thick-section composites for U.S. Army-relevant applications. Among several constituents, the CIA uses S2-glassepoxy andor S2-glassvinyl ester composites in its construction. The S2-glass-reinforced composite provides ballistic protection and load bearing due to the flexural loading caused from vehicle movement over various terrains. The S2-glass-reinforced composite is subjected to different levels of delamination when impacted by projectiles. The present study focuses on the repair of S2- glassepoxy composites subjected to a clean perforation type of ballistic impact scenario and post-repair flexural response of the composite panels. Simple repair solutions involving the use of different plugs reinforcing the damage 12.7-, 25.4-, and 38.1-mm 0.5-, 1-, and 1.5-in clean perforations have been implemented in S2-glassvinyl ester laminates. Static and fatigue tests were conducted under flexural loading. The effects of implementing the repair strategies on the flexure performance have been reported.
- Laminates and Composite Materials
- Test Facilities, Equipment and Methods