Enhanced Protection: Exploring the Penetration Resistance of Star Shape Auxetic Material
Journal Title: GeoStruct Innovations - Year 2024, Vol 2, Issue 3
Abstract
This study investigates the performance of star-shaped auxetic structures as protective materials in aluminum containers, designed to safeguard sensitive or hazardous materials during road transport. Finite element analysis (FEA) was conducted to assess the impact resistance of the star-shaped auxetic structure under high-speed collisions, simulating potential events such as explosions or sudden impacts. The simulations were performed using Autodesk's event simulation algorithm. In the first analysis, the auxetic structure was subjected to loading conditions applied to the metallic casing, while in the second, the metallic casing was considered rigid, with the focus placed on the structural behavior of the auxetic material under extreme stress conditions. Both scenarios examined the response of the auxetic structure in the plastic deformation region. The results indicate that the maximum stress developed in both loading cases approached 80 MPa. Notably, in the second scenario involving the rigid casing, the maximum displacement of the auxetic structure increased threefold compared to the first study. Despite the extreme loading conditions, the auxetic structure maintained significant cohesion, ultimately failing in a controlled manner. The ability of the star-shaped auxetic structure to absorb substantial impact loads is attributed to the twisting deformation of the structure, which redirects the applied stress towards the center of the impact area. These findings highlight the potential of star-shaped auxetic materials in providing enhanced protection for sensitive materials during transport, demonstrating their ability to withstand severe dynamic loading and to effectively dissipate energy upon impact.
Authors and Affiliations
Ioannis Ntintakis, Georgios E. Stavroulakis, Eirini Stouraiti
Keywords
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- EP ID EP753281
- DOI https://doi.org/10.56578/gsi020303
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