A5028740657- Numerical methods in engineering
- Concrete and Cement Materials Research
- Structural Behavior of Reinforced Concrete
- Geotechnical Engineering and Underground Structures
- Innovative concrete reinforcement materials
- Fatigue and fracture mechanics
- Concrete Corrosion and Durability
- Fluid Dynamics Simulations and Interactions
- Advanced Sensor and Energy Harvesting Materials
- Recycling and utilization of industrial and municipal waste in materials production
- Conducting polymers and applications
- Rock Mechanics and Modeling
- High-Velocity Impact and Material Behavior
- Structural Response to Dynamic Loads
- Concrete Properties and Behavior
- Fire effects on concrete materials
- Structural Load-Bearing Analysis
- Supercapacitor Materials and Fabrication
- Smart Materials for Construction
- Composite Material Mechanics
- Metal Forming Simulation Techniques
- Recycled Aggregate Concrete Performance
- Mechanical Behavior of Composites
- Infrastructure Maintenance and Monitoring
- Railway Engineering and Dynamics
Korea University
2015-2024
China University of Petroleum, East China
2018-2022
Technical Design (United States)
2022
Sangmyung University
2021
Bauhaus-Universität Weimar
2012
Universiti Teknologi MARA
2012
University of the Witwatersrand
2012
National Cheng Kung University
2011
National Kaohsiung Marine University
2011
Northwestern University
1999-2004
Abstract A methodology is developed for switching from a continuum to discrete discontinuity where the governing partial differential equation loses hyperbolicity. The approach limited rate‐independent materials, so that transition occurs on set of measure zero. treated by extended finite element method (XFEM) whereby arbitrary discontinuities can be incorporated in model without remeshing. Loss hyperbolicity tracked indicator enables both crack speed and direction determined given material...
Abstract An extended finite element method scheme for a static cohesive crack is developed with new formulation elements containing tips. This can treat arbitrary cracks independent of the mesh and growth without remeshing. All cracked are enriched by sign function so that no blending local partition unity required. able to entire only one type enrichment function, including tip. applied linear 3‐node triangular quadratic 6‐node elements. To ensure smooth closing crack, stress projection...
A stretchable polyaniline nanofiber temperature sensor array with an active matrix consisting of single-walled carbon nanotube thin-film transistors is demonstrated. The integrated gives mechanical stability under biaxial stretching 30%, and the resultant spatial mapping does not show any or electrical degradation.
We report on the facile fabrication of a stretchable array highly sensitive pressure sensors. The proposed sensor consists top layer Au-deposited polydimethylsiloxane (PDMS) micropillars and bottom conductive polyaniline nanofibers polyethylene terephthalate substrate. sensors are operated by changes in contact resistance between Au-coated according to varying pressure. fabricated exhibits sensitivity 2.0 kPa–1 range below 0.22 kPa, low detection limit 15 Pa, fast response time 50 ms, high...
An algorithm to solve the inverse problem of detecting inclusion interfaces in a piezoelectric structure is proposed. The material are implicitly represented by level sets which identified applying regularization using total variation penalty terms. solved iteratively and extended finite element method used for analysis each iteration. formulation presented three-dimensional structures inclusions made different materials detected multiple sets. results obtained prove that iterative procedure...
Abstract We have developed a new crack tip element for the phantom‐node method. In this method, can be placed inside an element. Therefore, cracks propagate almost independent of finite mesh. two different formulations three‐node triangular and four‐node quadrilateral element, respectively. Although method is well suited one‐point quadrature scheme, it used with other general schemes. provide some numerical examples static dynamic problems. Copyright © 2007 John Wiley & Sons, Ltd.
Abstract A method for modelling the growth of multiple cracks in linear elastic media is presented. Both homogeneous and inhomogeneous materials are considered. The uses extended finite element arbitrary discontinuities does not require remeshing as grow; also treats junction cracks. crack geometries with respect to mesh described by vector level sets. overall response structure obtained until complete failure. stability analysis competitive tips performed. applied bodies plane strain or...
We report on the fabrication of a biaxially stretchable array high performance microsupercapacitors (MSCs) deformable substrate. The substrate is designed to suppress local strain applied active devices by locally implanting pieces stiff polyethylene terephthalate (PET) films within soft elastomer Ecoflex. A suppressed region formed top surface substrate, below which PET are implanted. Active placed this can be isolated from strain. Analysis distribution finite element method confirms that...
A stretchable multisensor system is successfully demonstrated with an integrated energy-storage device, array of microsupercapacitors that can be repeatedly charged via a wireless radio-frequency power receiver on the same polymer substrate. The devices are interconnected by liquid-metal interconnection and operate stably without noticeable performance degradation under strain due to skin attachment, uniaxial up 50%. As service our authors readers, this journal provides supporting...
This paper presents a novel numerical procedure based on the combination of an edge-based smoothed finite element (ES-FEM) with phantom-node method for 2D linear elastic fracture mechanics. In standard method, cracks are formulated by adding phantom nodes, and cracked is replaced two new superimposed elements. approach quite simple to implement into existing explicit programs. The shape functions associated discontinuous elements similar those elements, which leads certain simplification...