About this Abstract |
Meeting |
2024 TMS Annual Meeting & Exhibition
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Symposium
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Printed Electronics and Additive Manufacturing: Advanced Functional Materials, Processing Concepts, and Emerging Applications
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Presentation Title |
Design and Fabrication of Nacre-inspired, Polymer-based Composites with Enhanced Tear Resistance and Toughness by a Multi-material 3D Printer |
Author(s) |
Jie Yang, Po-Yu Chen |
On-Site Speaker (Planned) |
Jie Yang |
Abstract Scope |
Enhancing tear resistance, flexibility, and toughness simultaneously in printed electronics and wearable devices poses a significant challenge. Abalone nacre composed of hierarchically-structured stiff CaCO3 tiles and soft bio-polymers exhibits intriguing toughening mechanisms. Inspired from nacre, we utilized a multi-material 3D printing system to fabricate multilayered stiff/soft polymer sheets with tunable toughness, tensile strength, tearing strength, and bending strength. To elucidate the structure-property relationship, a systematic parametric study has been conducted based on different stacking distances, rigidities of constituents, and arrangements of compliant phases. Results showed that the complex interface between stiff and soft polymers induced distributed crack initiation in the soft material and led to tortuous crack propagation at the interfaces, which effectively improves tear resistance by 40% and toughness by 20% compared to the stiff constituent. We established design principles to enhance mechanical performance of polymer-based composites, which can be applied in printed electronics, wearable devices, and related applications. |
Proceedings Inclusion? |
Planned: |
Keywords |
Additive Manufacturing, Mechanical Properties, Polymers |