Self-Healing Materials for Mitigation of Blast Damage Pis: N.R. Sottos, S.R. White Purpose/Relevance: Student: J. Patrick To develop self-healing materials capable of autonomous protection and recovery from blast induced damage. Innovation: - Extension of self-healing technology with seamless integration into state-of-the-art composite structural systems. - New self-healing materials development for blast damage. This Year’s outcome: - Demonstration of self-healing in microvascular PUR foam for sandwich panel core materials - Development of vascularized 3D woven fiber-reinforced composite Long-range impact: New class of self-healing materials developed with specific emphasis on high-energy absorption capabilities for blast infrastructure. Next Year: System optimization through experimental evaluation. Structural sandwich panel integration. Publish research findings in peer-reviewed journals. Progress to Date: Self-Healing Foam Core for Structural Sandwich Panels 3D Woven Composite Sandwich Structure (3TEX) Microvascular Healing Recovery of Mode I Fracture Toughness Polyurethane (PUR) foam core material Progress to Date: Self-Healing 3D Woven Composite Face Sheets 3D Woven Composite Sandwich Structure (3TEX) 3D Woven Preform “Sacrificial” fibers woven into 3D preform Delivery of healing fluids Composite fabricated via VARTM Fiber evacuation by heating Research Plan • Optimize PUR evaluation foam healing system through experimental • Develop a protocol to damage and heal the woven composite face sheets, e.g. End Notched Flexure (ENF) or Compression after Impact (CAI) • Demonstrate recovery of mechanical properties in woven fiberreinforced composites and measure healing efficiency • Begin integration of self-healing of core and face sheet components into structural composite sandwich panel for eventual blast evaluation Self-Healing Materials for Mitigation of Blast Damage Prof. Nancy Sottos, University of Illinois Urbana-Champaign Current Ph.D. student: Jason Patrick Papers/Patents/Presentations: “Three-Dimensional Microvascular Fiber-Reinforced Composites”, submitted for publication (2011). “A Method for Preparation of Three-Dimensional Microvascular Fiber-Reinforced Composites” University of Illinois Invention Disclosure (2011) Collaboration with Industry: Collaborated with 3-Tex on manufacture of 3-D woven composite face sheets with sacrificial fibers to create microvascular networks for healing. Picture: Sacrificial fibers woven into Microvascular composite 3D glass preform (3TEX) capable of fluid transport