About this Abstract |
Meeting |
2024 ASC Technical Conference, US-Japan Joint Symposium, D30 Meeting
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Symposium
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2024 ASC Technical Conference, US-Japan Joint Symposium, D30 Meeting
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Presentation Title |
Exceeding Structural Lifetimes: Asymptotic Self-Healing in Fiber-reinforced Polymer Composites
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Author(s) |
Jack Steven Turicek, Zachary J Phillips, Kalyana B Nakshatrala, Jason F Patrick |
On-Site Speaker (Planned) |
Jack Steven Turicek |
Abstract Scope |
Lightweight fiber-reinforced polymer composites inherit remarkable mechanical properties resulting from a hierarchical makeup. However, the layered structure in laminated composites creates high propensity for interlaminar delamination, (i.e., debonding of fiber-reinforcement from the surrounding matrix). Thermal remending of poly(ethylene-co-methacrylic acid) (EMAA) thermoplastic inclusions has emerged as a promising damage mitigation tactic, not only toughening against fracture, but also demonstrating repeatable self-healing [1,2]. A recent advancement enabling in situ thermal remending of EMAA via embedded resistive heaters has extended heal cycles (from 10 to 100) in a structural fiber-composite [3]. Here in our latest embodiment, by automating in situ thermo-mechanical evaluation, we achieve another order of magnitude increase in self-healing repeatability (i.e., 1000 cycles). While fracture recovery slowly declines according to a Weibull distribution, the unique chemo-physical mechanisms between EMAA and the composite constituents are revealed. Translating this latest lifetime extension into real-world context, a monthly healing schedule would sustain for 80+ years, exceeding the design life of many modern structures (e.g., aircraft, wind turbines, naval vessels, automobiles) and finally eliminating interlaminar delamination as a critical failure mode. |
Proceedings Inclusion? |
Definite: Post-meeting proceedings |