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Meeting 2016 TMS Annual Meeting & Exhibition
Symposium Biological Materials Science Symposium
Presentation Title On the Exceptional Deformability and Toughness of Snake Eggshells
Author(s) Yin Chang,
On-Site Speaker (Planned)
Abstract Scope Eggshells serve as multifunctional shields for successful embryogenesis, such as protection, moisture control and thermal regulation. Unlike calcareous avian eggshells which are brittle and hard, reptilians have leathery eggshells that are tough and flexible. In this study, we investigate structure and mechanical properties of eggshells of Taiwan cobra snake (Naja atra) which composed mainly of keratin. Mechanical tests showed that snake eggshells are highly extensible and reversible. The exceptional deformability (110-230% tensile strain) and toughness of snake eggshells are contributed by the wavy and random arrangement of keratin and collagen fibers. Multi-scale toughening mechanisms of snake eggshells were observed and elucidated, including crack deflection and twisting, fibers reorientation, sliding and bridging, inter-laminar shear effect, and the - phase transition of keratin. Inspirations from the structural and mechanical designs of snake eggshells may lead to the synthesis of tough, extensible, lightweight composites which can be applied in various fields.
Proceedings Inclusion? Planned: Publication Outside of TMS (Indicate publication title and publisher if known.)

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A Comparison of the Microstructure of Teleost Fish Scales
A Comparison of Tooth Enamel from Disparate Mammals
Analysis of Naturally-occurring and Biomimetic Rod Like Microstructures
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Atomistic-based Continuum Model of Spontaneous Self-assembly and Dynamics of Double Helix Polymers
Bio-inspired Flexible Armors with 3D Printed Tailored Architectures
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Biochemical Characterisation of Rhizophora mangle L. Leaf: Prospect as a Natural-Green Inhibitor of Steel-Rebar Corrosion in Marine/Saline Service-Environment
Bioinspired Composites through Clathrates and Hydrates in Freeze Casting
Biomimetic Hard-to-Soft Interfaces: Guiding Osteogenesis to Infection Free Implants
Biomimetic Remineralization Strategies towards Novel Dental Health Care
Chemotherapeutic-Induced Surface Degradation of Subcutaneous Venous Access Ports - A Preliminary Comparative In-Vitro and In-Vivo Study
Competition of Elastic-plastic Deformation and Fracture in Plastic Zone Ahead Crack Tip in Dentin and Tooth Enamel
E-1: A Comparative Analysis of Biological and Not Biological Cardiac Valves Replacement in the Brazilian Health Care System
E-2: Analyses and Characterization of Nanofiber Coating Layers of Implant Biomaterials
E-3: Biological Response of Interconnected Ti-6Al-4V Foam Constructs for Biomedical Implants: A Vascularization Issue
E-4: The Effects of Obesity on the Shear Strength of Murine Growth Plates
E-5: Synthesis of Polymeric Hydrogels Containing Nano-silver and Antibiotic for Wound Healing Applications
Electrochemical Properties of Microarc Oxidation Coating on Biocompatible Magnesium Alloy
Fabrication of Polymer/Bio-based Hydroxyapatite Composite Electrospunn Fibers for Scaffold Applications
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Functional Design of Keratinous Materials: Pangolin Scales and the Feather Shaft
Influence of Interface on the Fracture of Bio-inspired Laminated Composites
Lightweight Biological Composites: The Relationship between the Structure and Function of the Feather Vane and Inspired Designs
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Micropillar Cyclic Compression Study of a Nitinol Tube Intended for Medical Devices
Microstructure and Tribological Behaviors of Laser Clad Ti-based Metallic Glass Composite Coatings
Monotonic and Cyclic Response of Austenitic and Martensitic NiTi wires for Medical Device Applications
Nanoclay Scaffold Testbed for Growing 3D Cancer Tumoroids
Nanoindentation-based Mechanical Spectroscopy of Wood Cell Walls
Nature’s Multiscale Design Strategies and Smart Manufacturing of Engineering Materials
On the Exceptional Deformability and Toughness of Snake Eggshells
On the Reduction in Crack Growth Resistance of Human Enamel with Age
Paddlefish Rostrum as a Structure for Bioinspiration: Analysis and Modeling of the Stress State and Strain Rate Dependence Behavior of Cartilage
Structural Design Elements in Biological Materials: Application to Bioinspiration
Synthesis of Multifunctional Scaffolds from Natural Materials by Freeze Casting Technique
The Effect on Head and Neck Cancer Cell Induced by N2/He Micro-plasma Exposure
The Effects of Closed-Cell Metallic and Polymeric Foams on the Dynamic Mechanical Response of Bone and Brain Simulants via Impact Testing
The Twisted Fibrous Structure and Mechanical Behavior of Coelacanth
Towards Computer-aided, Rational Design of Ceramic Biomaterials: Combining Micro-Computed Tomography, Nanoindentation, Ultrasonic, and Micromechanical Theory
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