Cesarano, Pasquale (2024) Constructional design of echinoid test: Mechanical behavior and potential for biomimetic applications. [Tesi di dottorato]
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| Tipologia del documento: | Tesi di dottorato |
|---|---|
| Lingua: | English |
| Titolo: | Constructional design of echinoid test: Mechanical behavior and potential for biomimetic applications |
| Autori: | Autore Email Cesarano, Pasquale pasquale.cesarano@unina.it |
| Data: | 7 Ottobre 2024 |
| Numero di pagine: | 162 |
| Istituzione: | Università degli Studi di Napoli Federico II |
| Dipartimento: | Strutture per l'Ingegneria e l'Architettura |
| Dottorato: | Ingegneria strutturale, geotecnica e rischio sismico |
| Ciclo di dottorato: | 36 |
| Coordinatore del Corso di dottorato: | nome email Iervolino, Iunio iunio.iervolino@unina.it |
| Tutor: | nome email Marmo, Francesco [non definito] Luciano, Rosati [non definito] |
| Data: | 7 Ottobre 2024 |
| Numero di pagine: | 162 |
| Parole chiave: | biomimetic, structural materials, echinoids, Paracentrotus Lividus, stereom. |
| Settori scientifico-disciplinari del MIUR: | Area 08 - Ingegneria civile e Architettura > ICAR/08 - Scienza delle costruzioni |
| Depositato il: | 11 Ott 2024 08:30 |
| Ultima modifica: | 10 Mar 2026 13:53 |
| URI: | http://www.fedoa.unina.it/id/eprint/15363 |
Abstract
Structural variability of biominerals has been demonstrated to result in unusual advantageous mechanical properties in many organismal structures, including vertebrate bones, mollusk shells and sea urchin teeth and spines. These observations inspired numerous researches on biological materials selected over millions of years of evolution to discover their hidden structural secrets and recreate them into new technical applications. Interesting structural strategies are arising from studying the echinoid skeleton that can inspire the engineering world of building constructions at different dimensional scales. Echinoids, commonly known as sea urchins, are characterized by an ultralight-weight and resistant skeleton consisting of a porous 3D lattice-like meshwork, known as stereom. The stereom displays unique structural, compositional and crystallographic heterogeneities able to meet several mechanical needs according to a direct and clear structure–function relationship adapted to withstand biotic and abiotic stresses. The main goal of this doctoral research was to gain new insights about the microarchitectural variability analyzing the interambulacral plate of the sea urchin Paracentrotus Lividus. Accordingly, micro-CT scans, image analysis, 3D modelling, and linear elastic FE-Analysis were conducted to provide new insights about the topological and geometrical variability of the different stereom types, and their region-specific mechanical behavior calculated for tensile and shear loadings. The results achieved were of value to improve the understanding of the mechanical function of the stereom variability, as well as to identify adaptive strategies to develop new lightweight, high-performance impact-resistant and energy-absorbent bioinspired materials. These bioinspired structural materials can be effectively employed in building construction as well as in many other fields of our society, reducing energy and resources and thus providing environmental and economic advantages
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