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SUMMARY:Mechanics\, Additive Manufacture\, and Characterisation of Lattice
  Biostructures - Faezeh Shalchy\, CUED
DTSTART:20210611T133000Z
DTEND:20210611T140000Z
UID:TALK155356@talks.cam.ac.uk
CONTACT:Hilde Hambro
DESCRIPTION:With an increasingly ageing population\, challenges within hea
 lthcare in the coming decades are expected to be in the area of repair and
  replacement of tissues and organs. The advent of Additive Manufacturing h
 as afforded new opportunities for the fabrication of biomedical scaffolds 
 and structured materials. This work addresses manufacturing and mechanics 
 of 3D printed structures for biomedical applications\, with an aim to prom
 ote their mechanical performance. Here we present a novel idea to introduc
 ing hierarchical porosity by printing polymer-porogen blends. The fabricat
 ed parts and filaments were characterised microscopically and mechanically
 .\n\n  The structure-property relationship of woodpile lattice fabricated 
 using fused deposition modeling under compressive loading along stacking d
 irection is studied analytically\, computationally and experimentally. Lat
 tices with a variety of cross-sectional shape of the struts are successful
 ly fabricated and characterised. Novel 3D printing dies capable of printin
 g such lattices are manufactured and the effectiveness of this strategy is
  assessed experimentally as well as numerically and theoretically. Lattice
 s with aligned and staggered arrangements are investigated. While the comp
 ression of the staggered arrangement is bending-dominated\, the response o
 f lattices in the aligned configuration is primarily due to diametrical co
 mpression of the struts. Novel scaling laws are reported. Analytical expre
 ssions for the apparent stiffness are derived accounting for filament flex
 ure\, diametrical compression\, and response of tube under diametrically p
 inched load. Excellent agreement with numerical and experimental results i
 s obtained.
LOCATION:Zoom Meeting ID: 867 5602 4340
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