recycling-2018-keynote

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Journal of Environmental Waste Management and Recycling | Volume 1
alliedacademies
March 05-06, 2018 | London, UK
Recycling & Waste Management
5th International Conference on
Notes:
Fracture toughness is a measure of the resistance of
a material to fracture. This fundamental property is
used in diverse engineering designs including mechanical,
civil, materials, electronics and chemical engineering
applications. The evaluation of this remains challenging for
extremely heterogeneous materials such as concretes. This
talk will focus on how the principles of photonics can be
applied innovatively for evaluating the fracture toughness
of composite concretes using polymeric particulates
derived from Qatar municipal wastes. Different grades of
particulates derived from the municipal wastes are used as
a partial replacement of natural aggregates in fabricating
the concretes. Then, inspired by the stress-displaying
properties of human cornea, and by applying a thin cornea-
like birefringent coating on the surface of opaque, notched
composite concrete beams, the evolution of the maximum
shear stress (/strain) distribution on the beams is sensed
under the external loading. The location of the maximum
deviator stress is tracked ahead of the crack tip (fracture
processing zone) on the concrete samples under the ultimate
load, and hence the effective crack length is characterised.
Using this, the fracture toughness of the heterogeneous
composite beams is evaluated and the results compare
favourably with other conventional methods using combined
experimental and numerical/analytical approaches. Hence
the current photonics-based study could help in evaluating
the failure strength of new materials using wastes more
effectively in future.
Speaker Biography
S Joseph Antony is Associate Professor at the School of Chemical and Process
Engineering, University of Leeds, U.K. He is an expert in the area of photonic stress
analysis and multi-scale mechanics of discrete and continuum materials. His research
area covers a wide range of inter-disciplinary problems using advanced computational
and experimental technologies. His current research includes particulate mechanics
(MD, DEM, FEM modelling), nano, micro and macroscopic properties of powders and
grains, force transmission patterns in materials subjected to mechanical, electrical
and combined loading conditions and developing composites for constructions from
municipal wastes.
e:
S Joseph Antony
University of Leeds, UK
A novel method for determining the mechanical strength of wastes-embedded
concretes using the principles of photonics