Bio-Inspired Synthesis of Multifunctional Materials with Self-Adaptable Mechanical Properties and Self-Regeneration
Abstract
In this reporting period, we verified our hypothesis that our material system can have damage-mitigation capability from its characteristic that the stress-generation neardamage sites can trigger mineralization due to the charges generated from piezoelectric materials, thus, mitigating the crack and/or slowing down the crack propagation, by comparing the fatigue behaviors in different loading environments (air, water, simulated body fluid). Our results show a new mechanism to mitigate failures of materials through a multifunctional material system that can proportionally facilitate mineralization as a function of stress by coupling mechanics and chemistry. Moreover, we investigated liquid-infused porous piezoelectric composites inspired by the fact that bone is a porous material with blood infused within the material so that our material system can be utilized in a non-liquid environment. We successfully demonstrated self-stiffening behaviors of the liquid-infused porous material, which showed desirable characteristics of increasing both modulus and dissipation after experiencing cyclic loadings. We envision that our findings will contribute to next generation of aerospace materials that can be utilized in a broad range of loading conditions with significantly extended lifetime and reduced fiscal and time costs associated with inspection, maintenance and downtime.
Document Details
- Document Type
- Technical Report
- Publication Date
- Jul 14, 2022
- Accession Number
- AD1230336
Entities
People
- Sung Kang
Organizations
- Johns Hopkins University