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Symposia
SYMPOSIUM 1
DESIGN OF 3D PRINTED RON-RESCH-LIKE ORIGAMI STRUCTURES
WITH TAILORED GEOMETRICAL PROPERTIES
Hani Naguib
Professor
Department of Mechanical and Industrial Engineering
University of Toronto
Abstract
Recently, origami inspired metamaterials have attracted attention in
different engineering and biomedical applications. Ron-Resch-Like
origami tessellation is one of the patterns that can be used to create
different 3D origami panels. It has the ability to create flat and curved
panels. Ron-Resch-Like cores can have a wide range of applications that
are subjected to force and energy damping, the proper selection of the
designed origami configurations can lead to high performance of the
global mechanical properties of the cores. The origami tessellation
parameters can be tailored to enhance the passive and the active
properties of the cores panels and the origami unit cell. This work focuses
on the effect of the design parameters of different Ron-Resch-Like origami
inspired structures on the passive and active properties, both theoretically loadings. In those cases, several physical mechanisms have to be properly
and experimentally. The Ron-Resch cores were fabricated from а
polymeric based material using Fused Deposition Modeling (FDM)
additive manufacturing process. The mechanical properties of the
fabricated cores were investigated and compared with the numerical
models.
Biography
Hani Naguib is a Professor at the University of Toronto, and director of the mechanisms that take place during thermomechanical loading drives their
Toronto Institute for Advanced Manufacturing. His major expertise is in the
area of manufacturing of smart and bio-inspired materials including:
electroactive polymers, shape memory polymers; and nanostructured
polymers and composites. Naguib is the recipient of many honours and
awards such as the Canada Research Chair, the Premier’s Early Research
Award of Ontario, the Canada Foundation of Innovation, and the faculty
Early Teaching Award. He is a Professional Engineer in Canada, a
Chartered Engineer in U.K., a Fellow of the Institute of Materials Minerals
and Mining IOM3, the American Society of Mechanical Engineers ASME,
the Society of Plastics Engineers SPE, the Canadian Society of Mechanical
Engineers CSME, and the International Society for Optics and Photonics
SPIE. Naguib is serving as Associate Editor for the IOP Journal of Smart
Materials and Structures, Journal of Cellular Plastics and Cellular Polymers scales for fully-coupled thermomechanical problems.
Journal. He has been organizing and chairing various technical sessions,
symposia and seminars at international conferences in the field. The main
goal of his research program is to develop sustainable and
transformational materials and manufacturing for the energy management,
transportation and health care sectors.
SYMPOSIUM 2
THERMOMECHANICAL RESPONSE OF SHAPE MEMORY ALLOYS
WHEN PHASE TRANSFORMATION IS COUPLED WITH OTHER
PHENOMENA: TOWARDS SIMULATION OF MULTI-FUNCTIONAL
STRUCTURES
Yves Chemisky
Maître de conférences à Arts et Métiers ParisTech
Abstract
Multi-functional composite materials, especially utilizing shape memory
alloys, are extensively employed in a wide range of industrial sectors
(biomedical, aerospace, automotive). With the deployment of applications
in those key industrial sectors, the development of adequate numerical
tools are unavoidable towards an optimal design of new efficient and
reliable components. Several new models are currently developed that
aim to predict not only the thermomechanical response but also the
fatigue life and the geometrical evolution of shape memory alloys and
high-temperature shape memory alloys structural parts undergoing cyclic
described and formulated, and the numerical implementation of the
resulting constitutive equations is often a cumbersome task. To overcome
those difficulties we propose a generic methodology for the development
of numerical constitutive models, that starts with the selection of key
mechanisms governing the microstructure evolution, and ends with
ready-to-implement optimized numerical resolution scheme. Numerical
considerations are thus integrated in an early stage of the development of
the constitutive models, when the in-depth knowledge of the physical
proper hierarchical description. The proposed methodology includes also
the proper generic formulation of the operators required for an
implementation in Finite Element Analyses packages, considering
fully-coupled thermomechanical analyses. It is demonstrated that this
generic methodology is fully adapted to address the cases when phase
transformation is coupled with viscoplastic strains (that occurs in High
Temperature Shape Memory Alloys actuators), martensitic variants
reorientation in the case of complex thermomechanical loading path of
SMA devices and both TRIP strain and damage to predict the structural
and functional fatigue of SMA actuators. It is finally shown that the
proposed methodology is well-adapted to develop scale transition
operators required in homogenization schemes to bridge the length
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