A5067826712- Structural Load-Bearing Analysis
- Numerical methods for differential equations
- Structural Behavior of Reinforced Concrete
- Structural Response to Dynamic Loads
- Electromagnetic Simulation and Numerical Methods
- Fire effects on concrete materials
- High-Velocity Impact and Material Behavior
- Composite Structure Analysis and Optimization
- Structural Analysis and Optimization
- Concrete Corrosion and Durability
- Differential Equations and Numerical Methods
- Vibration and Dynamic Analysis
- Matrix Theory and Algorithms
- Innovative concrete reinforcement materials
- Elasticity and Material Modeling
- Structural Engineering and Vibration Analysis
- Real-time simulation and control systems
- Fatigue and fracture mechanics
- Mechanical stress and fatigue analysis
- Metal Forming Simulation Techniques
- Automotive and Human Injury Biomechanics
- Fractional Differential Equations Solutions
- Advanced Numerical Methods in Computational Mathematics
- Computational Fluid Dynamics and Aerodynamics
- Numerical methods in engineering
University of Hong Kong
1988-2025
Nanyang Technological University
2013-2024
HKU-Pasteur Research Pole
2006
Royal Canadian Mounted Police
1982
An experimental program was conducted in this study to investigate the dynamic behavior of flush end plate steel beam-column cruciform connections following instantaneous removal a central supporting column. The tests were performed by using quick-release mechanism simulate sudden column-removal scenarios. In test program, geometries end-plate remained unchanged but subjected five different magnitudes uniformly distributed load. Another quasi-static also carried out for comparison with...
In Part 1 of this paper, the sampling grid points for differential quadrature method to give unconditionally stable higher-order accurate time step integration algorithms are proposed solve first-order initial value problems. is extended second-order The conventional approaches impose given conditions discussed. A new approach then presented. It found that could generate equations directly. Furthermore, procedure can be generalized construct third- and problems without any difficulties....
In this paper, the differential quadrature method is used to solve first-order initial value problems. The condition given at beginning of a time interval. derivative sampling grid point within interval can be expressed as weighted linear sum and function values points order accuracy stability property solutions depend on locations points. It shown that end improved 2n–1 or 2n if n are chosen carefully. fact, approximate equivalent generalized Padé approximations. resultant algorithms...
The identification of a three dimensional constitutive model is useful for describing the complex mechanical behavior nonlinear and anisotropic biological tissue such as esophagus. inflation tests at fixed axial extension 1, 1.125, 1.25 were conducted on muscle mucosa layer porcine esophagus separately pressure-radius-axial force was recorded. experimental data fitted with to obtain structure-related parameters, including collagen amount fiber orientation. Results showed that bilinear strain...
The structural behavior of circular hollow section (CHS) T-joints subjected to axial brace compression in fire conditions was investigated. Five full-scale tubular joints with different brace-to-chord diameter ratios were tested under elevated temperature. tests isothermal heating conditions, where the specimens heated desired temperatures and then static load failure. ultimate strength failure modes these It observed that both reduction material changes localized plastification area beneath...
In this paper, unconditionally stable higher-order accurate time-step integration algorithms with controllable numerical dissipation are presented. The based on the Newmark method complex time steps. ultimate spectral radius (μ), sub-step locations (βj) and weighting factors (αj) algorithmic parameters. For an algorithm that is (2n−1)th order accurate, which may be complex, shown to roots of nth degree polynomial. polynomial given explicitly in terms n μ. then obtained by solving a system...
The computational effort to analyze a sandwich panel can be greatly reduced if an equivalent 2D thick‐plate bending model is used instead of detailed 3D finite‐element model. success the transformation from depends on elastic constants used. In this note, these for Z‐core panels are summarized. constant shear stiffness in weaker direction derived. To ascertain validity constants, results obtained with different boundary conditions compared From results, it shown that excellent agreement...
Abstract The esophagus, like other soft tissues, exhibits nonlinear and anisotropic mechanical properties. As a composite structure, the properties of outer muscle inner mucosal layer are different. It is expected that complex will induce nonhomogeneous stress distributions in wall nonuniform tissue remodeling. Both important factors which influence function mechanosensitive receptor located various layers wall. Hence, characterization essential to understand neuromuscular motion esophagus....
Fire resistance of steel joints is always a major concern in the design structures under extremely hazardous conditions. However, for circular hollow section (CHS) fire conditions, little information available, especially T-joints. To gain more insight into static behavior CHS T-joints elevated temperatures, experimental and numerical studies were conducted on selected subjected to in-plane bending. The failure modes ultimate strength different temperatures investigated compared...
<title>Abstract</title> Background and aims Clinical competency is paramount for nurses to ensure that patients receive safe, high-quality care. Generative artificial intelligence (GenAI) in nursing education gaining attention, evidence shows its suitability real-life situations. GenAI may be an effective solution enhancing nurses’ clinical competency. This study compared the impact of scenario-based patient simulation versus immersive 360° virtual reality (VR) on educational outcomes,...
To ensure structural integrity after modification and/or retrofitting, the behavior of strengthened tubular joints needs to be understood. The finite-element method is a useful tool for studying problem. However, this numerical technique has verified by experimental results before being used extensively. In paper, ultimate capacity doubler plate–reinforced studied. establish reference point, T-joint was fabricated, instrumented, and tested failure under axial compression brace loading....
In this paper, unconditionally stable higher-order accurate time step integration algorithms suitable for linear second-order differential equations based on the weighted residual method are presented. The manipulated directly. As in Part 1 of instead specifying weighting functions, parameters used to control algorithm characteristics. at least nth-order if numerical solution displacement is approximated by a polynomial degree n+1 with n undetermined coefficients. By choosing carefully,...
In this paper, a precise time-step integration method for dynamic problems is presented. The second-order differential equations are manipulated directly. A general damping matrix considered. transient responses expressed in terms of the steady-state responses, given initial conditions and step-response impulsive-response matrices. various types excitations readily obtainable. computation matrices their time derivatives studied paper. direct these using Taylor series solutions not efficient...
The time-dependent mechanical properties of the porcine esophagus were investigated experimentally and theoretically. It was hypothesized that viscoelasticity quasilinear, i.e., time strain effects independent. In order to verify separability effects, stress-relaxation test conducted at various strains data fitted with Fung’s quasilinear viscoelastic (QLV) model. By using material parameters obtained from stress relaxation test, cyclic peak hysteresis predicted. Results showed relaxed by...
A C-core sandwich panel consists of two facing plates connected top and bottom to a core C-shaped stiffeners. Sandwich panels this type have high bending shear-stiffness characteristic in the direction core. In transverse direction, however, both stiffness properties are relatively weak, particular shear stiffness. paper, weaker for is derived studied. Due geometry discontinuity configuration, must be from first principle. By assuming recurrence condition, writers previously an approximate...
Abstract To damp out spurious high‐frequency responses, time‐step integration algorithms for structural dynamic analysis should have controllable numerical dissipation in the regime. The also be unconditionally stable so that size is governed by accuracy requirement only. This paper reviews several recently developed frameworks can used to construct dissipative algorithms. continuous displacement (single‐field) formulations are considered here. algorithmic parameters control discussed.