Accession Number : ADA606966


Title :   Additive Layer Manufacturing of Biologically Inspired Short Fibre Reinforced Composites


Descriptive Note : Final rept. 1 Jan 2013-31 Mar 2014


Corporate Author : BRISTOL UNIV (UNITED KINGDOM)


Personal Author(s) : Trask, Richard S ; Hazzard, Mark ; Llewellyn-Jones, Tom


Full Text : https://apps.dtic.mil/dtic/tr/fulltext/u2/a606966.pdf


Report Date : Mar 2014


Pagination or Media Count : 89


Abstract : This project provided fundamental understanding towards novel additive layer manufacturing approaches for highly-ordered, short-fiber architectures. The fabrication challenge is a critical hurdle to the realization of complex, multi-scale architectures inspired by nature for improving the mechanical and functional properties of engineered materials. The study was advanced on two fronts: (1) development of new hierarchical architecture based on ZnO nanorods grown on glass fibers and coated with tetraethyl orthosilicate (TEOS) to promote self-assembly; and (2) exploitation of ultrasonic manipulation for controlling orientation and distribution of reinforcing short fibers. The ZnO/TEOS nanorods were shown to preserve mechanical properties of the base fibers while also displaying some healing capability for defects. For the ultrasonic manipulation, both micro-scale and nano-scale reinforcements were studied using a new prototype assembly system developed for the project. Enhancement of stiffness and strength properties in aligned directions was observed despite low volume fraction of reinforcement.


Descriptors :   *BIOMIMETICS , *FIBER REINFORCED COMPOSITES , ADAPTATION , CAMOUFLAGE , COLLAGEN , FINITE ELEMENT ANALYSIS , METAMATERIALS , NANOTECHNOLOGY , STRUCTURAL MECHANICS , TENDONS , ZINC OXIDES


Subject Categories : Laminates and Composite Materials
      Textiles


Distribution Statement : APPROVED FOR PUBLIC RELEASE