A5046588342- Adhesion, Friction, and Surface Interactions
- Force Microscopy Techniques and Applications
- Gear and Bearing Dynamics Analysis
- Elasticity and Material Modeling
- Cellular Mechanics and Interactions
- Hydrogels: synthesis, properties, applications
- Micro and Nano Robotics
- Mechanical Behavior of Composites
- Soft Robotics and Applications
- Nonlocal and gradient elasticity in micro/nano structures
- Composite Material Mechanics
- Lipid Membrane Structure and Behavior
- Amoebic Infections and Treatments
- Tribology and Lubrication Engineering
- Acoustic Wave Phenomena Research
- Advanced Thermodynamics and Statistical Mechanics
- Pancreatitis Pathology and Treatment
- Cellular transport and secretion
- Numerical methods in engineering
- Structural Analysis and Optimization
- Robot Manipulation and Learning
- Metal and Thin Film Mechanics
- Advanced Numerical Analysis Techniques
- Smart Materials for Construction
- Mechanical stress and fatigue analysis
University of British Columbia
2017-2025
Vancouver Biotech (Canada)
2019
University of California, Santa Barbara
2015-2018
University of Trento
2010-2013
The ability of cells to orient in response mechanical stimuli is essential embryonic development, cell migration, mechanotransduction, and other critical physiologic functions a range organs. Endothelial cells, fibroblasts, mesenchymal stem osteoblasts all perpendicular an applied cyclic stretch when plated on stretchable elastic substrates, suggesting common underlying mechanism. However, many these same parallel vivo 3D culture, compelling explanation for the different orientation...
A waveguide with a periodic structure is able to filter waves whose frequencies lie in the band-gap ranges displayed dispersion diagrams. The lengths of these forbidden bands depend on contrast material and geometrical properties parts system which realize periodicity. In this paper, novel way control band gaps proposed: set geometric characteristics prestretched made soft dielectric elastomer applying an external voltage pairs electrodes applied regular pattern device. technique proves be...
Cutting mechanics of soft solids is gaining rapid attention thanks to its promising benefits in material characterization and other applications. However, a full understanding the physical phenomena still missing, several questions remain outstanding.
Fibrillar adhesion, observed in animals like beetles, spiders and geckos, relies on nanoscopic or microscopic fibrils to enhance surface adhesion via ‘contact splitting’. This concept has inspired engineering applications across robotics, transportation medicine. Recent studies suggest that functional grading of fibril properties can improve but this is a complex design challenge only been explored simplified geometries. While machine learning (ML) gained traction adhesive design, no...
Double and triple network (TN) elastomers can be made by infusing monomers into a single (SN) polymer, causing it to swell, then polymerizing cross-linking the monomers. The result is double (DN) elastomer in which one stretched other hydrostatic compression. TN systems are repeating process starting with DN material. multinetwork (MN) exhibit Mullins effect softening occurs upon first cycle of loading, stiffness recovered above previous maximum strain. attributed rupture network,...
Friction and adhesion create an increment in penetration force with the depth of penetrator (needle) tip. This work provides correlation between increment, material properties needle radius.
Abstract Accurate prediction of the force required to puncture a soft material is critical in many fields like medical technology, food processing, and manufacturing. However, such strongly depends on our understanding complex nonlinear behavior subject deep indentation failure mechanisms. Only recently, we developed theories capable correlating with properties needle geometry. models are based simplifications that seldom limit their applicability real cases. One common assumption...
Abstract Investigations of backing‐layer effects in bioinspired fibrillar adhesives have shown that increased compliance is detrimental to the strength fibril arrays under normal loading due an increase severity a circumferential load concentration. In this work, impact misalignment on performance adhesive patches contacting smooth flat surfaces examined, demonstrating conditions for detachment are extremely limited. For array fibrils backing layer varying thickness, adhesion tests performed...
Abstract Reversible dry adhesives rely on short-ranged intermolecular bonds, hence requiring a low elastic modulus to conform the surface roughness of adhered material. Under external loads, however, soft accumulate strain energy, which release drives propagation interfacial flaws prompting detachment. The trade-off between required compliance, for conformity, and desire reduced energy rate, better strength, can be achieved with bi-material adhesive having tip rigid backing (RB). This design...
Abstract We propose here an asymptotic solution defining the optimal compliance distribution for a fibrillar adhesive to obtain maximum theoretical strength. This condition corresponds that of equal load sharing (ELS) among fibrils, i.e., all fibrils are carrying same at detachment; hence, they detach simultaneously. model array as continuum linear elastic material cannot laterally transmit (analogous Winkler soil). Ultimately, we fibril's in closed-form and compare it with previously...
We developed an image-based method to decompose forces during needle insertion/re-insertion, and found strain-rate dependence for toughness.