Three-dimensional Voronoi model of a nacre-mimetic composite structure under impulsive loading

Tran, P 2016, 'Three-dimensional Voronoi model of a nacre-mimetic composite structure under impulsive loading', Composite Structures, vol. 153, pp. 278-296.


Document type: Journal Article
Collection: Journal Articles

Title Three-dimensional Voronoi model of a nacre-mimetic composite structure under impulsive loading
Author(s) Tran, P
Year 2016
Journal name Composite Structures
Volume number 153
Start page 278
End page 296
Total pages 19
Publisher Elsevier Ltd.
Abstract Nacre, the inner layer of mollusk shells holds the key to the development of an effective composite system for protecting structures from extreme loads due to its superior fracture toughness, despite its brittle constituents. It is known that the hard mineral tablets provide structural rigidity, while the soft organic polymer matrix provides the mechanisms to mitigate damages and dissipate energy uniformly across the structure. Nacre's composite structure is arranged to have multiple laminates and three dimensional polygonal tablets bonded with organic adhesives to maximize its load sharing capability. This paper presents a novel 3D Voronoi model of an Aluminum/Vinylester composite structure that closely mimics multilayer nacre's tablet. Vinylester cohesive and adhesive layers are introduced between nacre-mimetic polygonal Aluminum tablets and layers, respectively, to simulate the bonding and delamination process. The performances of nacre-like composite structures under blast loading are evaluated in terms of maximum deformation, damage distributions as well as dissipated energy. The influences of size and shape of the nacre-mimetic tablets, as well as the number of composite laminates on the blast resistance of the composite are also investigated. Results reveal the importance of tablet size and number of laminates as opposed to the insignificant influences of tablet overlapping.
Subject Composite and Hybrid Materials
Solid Mechanics
Numerical Modelling and Mechanical Characterisation
Keyword(s) Bio-inspired composite
Biomimetic
Blast resistance
Finite element
Nacre
Voronoi
DOI - identifier 10.1016/j.compstruct.2016.06.020
Copyright notice © 2016 Elsevier Ltd.
ISSN 0263-8223
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