A5019141112- Advanced Materials and Mechanics
- Cellular and Composite Structures
- Advanced Sensor and Energy Harvesting Materials
- Structural Analysis and Optimization
- Micro and Nano Robotics
- GaN-based semiconductor devices and materials
- Topology Optimization in Engineering
- Modular Robots and Swarm Intelligence
- Metamaterials and Metasurfaces Applications
- Acoustic Wave Resonator Technologies
- Advanced Antenna and Metasurface Technologies
- Supercapacitor Materials and Fabrication
- Dynamics and Control of Mechanical Systems
- Dielectric materials and actuators
- Innovations in Concrete and Construction Materials
McGill University
2020-2025
Abstract Using multistable mechanical metamaterials to develop deployable structures, electrical devices, and memories raises two unanswered questions. First, can instability be programmed design sensors memory devices? Second, how properties tuned at the post‐fabrication stage via external stimuli? Answering these questions requires a thorough understanding of snapping sequences variations elastic energy in metamaterials. The mechanics deformation continuous force/energy–displacement curves...
Abstract A motif for rotational multistability is developed by arranging permanent magnets in a circular pattern and creating magnet pairs with magnetically induced negative incremental torsional stiffness. Through set of experimental numerical studies, different means to tailor the response pair are demonstrated. tandem tilted elastic arms harnessed form an energy‐trapping unit cell. By stacking several these cells upon each other, 1D rotationally multistable metamaterial capable storing...
The pursuit of efficient energy harvesting technologies at the nanoscale has prompted a thorough exploration piezoelectric nanogenerators. This study investigates properties (e.g., stress and strain constants, dielectric constant, piezopotential coefficient) nano-architected gallium nitride (GaN) metamaterials through molecular dynamics simulation. Constructing twelve different topologies from three architecture families (i.e., cubic, octahedron, triply periodic minimal surface), research...
Pyroelectric materials exhibit spontaneous polarization in response to temperature fluctuations, a phenomenon known as the pyroelectric effect. This study investigates properties of nanoarchitected gallium nitride (GaN) metamaterials with distinctive topologies, i.e., body-centered cube, octet truss, gyroid, and spinodoid, using molecular dynamics simulations. Our findings reveal topology-dependent enhancement coefficient, primarily affected by piezoelectric stress constant thermal expansion...
Mechanical metamaterials are made to display characteristics that not present in regular materials.Recent advances alternative structures, including inclined beams, curved shallow shells, Origamis, and shellulars, have it possible attain bistability multistability as novel features.There still two unsolved concerns about the use of multistable mechanical create electrical systems, memories, deployable structures.First, is programme instability?Second, how can we tune properties materials at...
Structures made out of periodic cellular materials can demonstrate enhanced stiffness-to-weight ratios.This enhancement relies on the architecture their underlying unit cells.In this study, we, first, investigate how distribution relative density cells affects bending stiffness an architected beam.Next, we present idea improving specific beam without increasing its weight by optimizing distribution, that is, optimally grading through length and/or across thickness beams.We define a general...