A5048174307- Composite Structure Analysis and Optimization
- Nonlocal and gradient elasticity in micro/nano structures
- Elasticity and Material Modeling
- Composite Material Mechanics
- Lipid Membrane Structure and Behavior
- Structural Analysis and Optimization
- Sphingolipid Metabolism and Signaling
- Polymer Nanocomposites and Properties
- Force Microscopy Techniques and Applications
- Surfactants and Colloidal Systems
- Polymer crystallization and properties
- Elasticity and Wave Propagation
- Electrospun Nanofibers in Biomedical Applications
- Thermoelastic and Magnetoelastic Phenomena
- Numerical methods in engineering
- Advanced Cellulose Research Studies
- Mechanical and Optical Resonators
- Rock Mechanics and Modeling
- Structural Engineering and Vibration Analysis
- Advanced Sensor and Energy Harvesting Materials
- Erythrocyte Function and Pathophysiology
- Nanopore and Nanochannel Transport Studies
- Rocket and propulsion systems research
- Prostate Cancer Diagnosis and Treatment
- Carbon Nanotubes in Composites
University of Alberta
2016-2025
Keimyung University
2002-2015
University of California System
2014
University of Michigan
2008
An ex vivo heart perfusion device preserves the donor in a warm beating state during transfer between extraction and implantation surgeries. One of current challenges includes use rigid noncompliant plastic tubes, which causes injuries to at junction tissue tube. The compliant rapidly strain-stiffening mechanical property that generates "J-shaped" stress-strain behavior is necessary for producing Windkessel effect, ensures continuous flow blood through aorta. In this study, we mimic J-shaped...
Abstract Respiratory protection is key in infection prevention of airborne diseases, as highlighted by the COVID-19 pandemic for instance. Conventional technologies have several drawbacks (i.e., cross-infection risk, filtration efficiency improvements limited difficulty breathing, and no safe reusability), which yet to be addressed a single device. Here, we report development filter overcoming major technical challenges respiratory protective devices. Large-pore membranes, offering high...
As the design and scalable technology development of tough, yet stiff, polymer nanocomposites receive attention in automotive industry, fundamental understating underlying toughening mechanisms at nanoscale is inevitable. However, mechanical tests on rubber-toughened have shown that their overall fracture properties are significantly smaller than theoretical predictions. Our previous study showed major factors this regard simultaneous operation different nanostructural features interface. a...
Nanocomposite technologies can be significantly enhanced through a careful exploration of the effects agglomerates on mechanical properties. Existing models are either overly simplified (e.g., neglect agglomeration effects) or often require significant amount computational resources. In this study, novel continuum-based model with statistical approach was developed. The is based modified three-phase Mori-Tanaka model, which accounts for filler, agglomerate, and matrix regions. Fillers...
The present study aims to develop a continuum-based model predict the pseudoelastic behavior of biological composites subjected finite plane elastostatics. proposed incorporates hyperelastic matrix material reinforced with nonlinear fibers, addressing challenges such as irreversible softening responses, large deformations, and stress–strain responses. kinematics reinforcing fibers are formulated via first second gradient continuum deformations and, more importantly, damage function variables...
ABSTRACT Our group has recently demonstrated the first fully solution‐processed polymeric multilayer piezoelectric devices. The key challenge, that is, effective control of redissolution issue, been overcome using a solvent offers adequate solubility but extremely slow dissolution for polymer, poly(vinylidene fluoride‐trifluoroethylene) [P(VDF‐TrFE)]. Several qualified solvents have identified. Here, we comparatively study effects on performance and production yield, choosing right Each...
A model of elastic solids reinforced with fibers resistant to extension and bending is formulated in finite-plane elastostatics. The linear theory the proposed also derived through which a complete analytical solution obtained. presented can serve as an alternative two-dimensional Cosserat non-linear elasticity.
Abstract This study demonstrates fully solution‐processed polymeric multilayer piezoelectric devices. The key challenge, the effective control of redissolution issue that will cause severe electrical shorting and inconsistent output, is overcome by searching for using a solvent offers adequate solubility but extremely slow dissolution polymer. screening methodology established demonstrated. process parameters systematically optimized to maximize performance devices can output high charge...
To evaluate prospectively the role of prostate-specific antigen (PSA) density in predicting Gleason score upgrading prostate cancer patients eligible for active surveillance (T1/T2, biopsy score≤6, PSA≤10 ng/mL, and ≤2 positive cores).Between January 2010 November 2013, among who underwent greater than 10-core transrectal ultrasound-guided biopsy, 60 radical prostatectomy. By use modified criteria, tumor grade surgical specimens was examined compared with results.Tumor occurred 24 (40.0%)....
We study the formation of membrane budding in model lipid bilayers with assumed to be driven by means diffusion trans-membrane proteins over a composite surface. The theoretical for incorporates modified Helfrich-type formulation as special case. In addition, spontaneous curvature is introduced into order accommodate effect non-uniformly distributed bending response membrane. Furthermore, we discuss effects line tension on membrane, and necessary adjustments boundary conditions. resulting...
The interface plays a crucial role in the physical and functional properties of polymer nanocomposites, yet its effects have not been fully recognized setting classical continuum-based modeling. In present study, we investigate roles interfiber interactions on toughening rubber nanofibers embodied thermoplastic-based materials. Emphasis is placed establishing comprehensive theoretical atomistic descriptions nanocomposite systems subjected to pull-out uniaxial extension longitudinal...
We present an analysis of the superposed incremental deformations lipid membranes in contact with a circular substrate. A complete analytical solution describing morphological transitions is obtained via Monge parametric representation and admissible linearization. The corresponding demonstrates smooth bounded behavior within finite domain interest (annular) and, more importantly, shows excellent stability as it approaches boundary substrate radius convergence compatible few nanometers....
A comprehensive linear model for an elastic solid reinforced with fibers resistant to extension and flexure is presented. This includes the analysis of both unidirectional bidirectional fiber‐reinforced composites subjected in‐plane deformations. Within prescription superposed incremental deformations, fiber kinematics are approximated used determine Euler equilibrium equations. The constraints bulk incompressibility admissible boundary conditions also discussed completeness. In particular,...