Bimaterial 3D printing and numerical analysis of bio-inspired composite structures under in-plane and transverse loadings

Tran, P 2017, 'Bimaterial 3D printing and numerical analysis of bio-inspired composite structures under in-plane and transverse loadings', Composites Part B: Engineering, vol. 108, pp. 210-223.


Document type: Journal Article
Collection: Journal Articles

Title Bimaterial 3D printing and numerical analysis of bio-inspired composite structures under in-plane and transverse loadings
Author(s) Tran, P
Year 2017
Journal name Composites Part B: Engineering
Volume number 108
Start page 210
End page 223
Total pages 14
Publisher Pergamom Press
Abstract This work presents a novel design, additive manufacturing and modeling approach of three dimensional voronoi-based composite structures that closely mimic nacre's multilayer composite structure. The hierarchical structure of natural nacre is mimicked to produce multilayer composite laminates assembled from three dimensional polygonal tablets bonded with organic adhesives. Furthermore, various complex geometries of the nacreous shells observed from the nature, such as the dome-shaped structure, are developed into three dimensional designs. A novel mapping algorithm is developed to generate complex structures of nacre-like composites that are readily fabricated by unique dual-material 3D printing technology. Preliminary 3D-printed prototypes with complex shapes and material combinations are presented. A novel numerical model of the nacreous composite is proposed, which includes tablet cohesive bonds and interlaminate adhesive layers to mimic the soft organic polymer matrix. The nacreous model is validated against a natural nacre specimen under uniaxial loading. To exemplify a potential application, a scaled model of a nacre-mimetic composite made of Aluminum tablets and Vinylester adhesive is constructed and assessed against blast-induced impulsive loading. The performance of the nacre-like composite panel is investigated in terms of deformation and energy dissipation.
Subject Composite and Hybrid Materials
Solid Mechanics
Numerical Modelling and Mechanical Characterisation
Keyword(s) 3D printing
Bio-inspired composite
Cohesive model
Nacre
Voronoi
DOI - identifier 10.1016/j.compositesb.2016.09.083
Copyright notice © 2016 Elsevier Ltd.
ISSN 1359-8368
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