A5053818871- Numerical methods in engineering
- Innovative concrete reinforcement materials
- Rock Mechanics and Modeling
- Fatigue and fracture mechanics
- Composite Material Mechanics
- Structural Behavior of Reinforced Concrete
- Composite Structure Analysis and Optimization
- Topology Optimization in Engineering
- Innovations in Concrete and Construction Materials
- Mechanical Behavior of Composites
- Concrete and Cement Materials Research
- Structural Analysis and Optimization
- Advanced ceramic materials synthesis
- Structural Load-Bearing Analysis
- Concrete Properties and Behavior
- Structural Response to Dynamic Loads
- High-Velocity Impact and Material Behavior
- Concrete Corrosion and Durability
- Fluid Dynamics Simulations and Interactions
- Probabilistic and Robust Engineering Design
- Advanced materials and composites
- Metal Forming Simulation Techniques
- Ultrasonics and Acoustic Wave Propagation
- Grouting, Rheology, and Soil Mechanics
- Geotechnical Engineering and Underground Structures
Cardiff University
2011-2022
Laing O'Rourke (United Kingdom)
2011-2012
University of Cyprus
2009-2011
Frederick University
2009
Technical University of Denmark
1973-2007
University of Wales
1998-2003
Aalborg University
1996-1998
The University of Sydney
1988-1997
Polytechnic University of Turin
1993
Universidad Politécnica de Madrid
1993
The Eshelby formalism for inclusion/inhomogeneity problems is extended to the nano-scale at which surface/interface effects become important. interior and exterior tensors a spherical inhomogeneous inclusion with interface stress effect subjected an arbitrary uniform eigenstrain embedded in infinite alien matrix, concentration inhomogeneity remote field are obtained. Unlike their counterparts macro-scale, are, general, not inside but position-dependent. They have property of radial...
Abstract The extended finite element method (XFEM) is improved to directly evaluate mixed mode stress intensity factors (SIFs) without extra post‐processing, for homogeneous materials as well bimaterials. This achieved by enriching the (FE) approximation of nodes surrounding crack tip with not only first term but also higher order terms asymptotic field using a partition unity (PUM). faces behind tip(s) are modelled independently mesh displacement jump functions. additional coefficients...
Synopsis Simple analytical expressions are proposed for determining the critical stress intensity factor K c , and energy release rate G of plain concretes in three-point bending. These take into account slow crack growth preceding fracture complex state existing at a propagating front. The toughness so determined is shown to be essentially independent test specimen dimensions depend only on mix variables. It also argued that unlike or F strongly dependent dimensions. therefore advisable...
This study is concerned with improving the accuracy of crack tip fields obtained using extended/generalized finite element method (XFEM). First, numerical integration stiffness matrices, which guarantees convergence (with quadrature) not only regular nodal displacements but also additional degrees freedom corresponding to enrichment functions, studied. As stresses by direct differentiation converged and coefficients functions still satisfactory, a statically admissible stress recovery (SAR)...
Synopsis Tests were performed on cement mortar and concrete beams, in two stages, with a view to studying the influence of several specimen mix variables upon fracture behaviour concrete. On basis results from first stage tests, which single water/cement ratio type coarse aggregate used, simple formula was established estimate toughness terms dimensions, maximum size notch depth, together compressive strength modulus elasticity (determined separate standard cylinder tests). It found predict,...
In this brief communication, we identify intrinsic length scales of several physical properties at the nano-scale and show that, for nano-structures whose characteristic sizes are much larger than these scales, obey a simple scaling law. The underlying cause size-dependence is competition between surface bulk energies. This law provides yardstick checking accuracy experimentally measured or numerically computed nano-structured materials over broad size range can thus help replace repeated...
A new retrofitting technique based on a material compatible with concrete is currently under development at Cardiff University. It overcomes some of the problems associated current techniques externally bonded steel plates and FRP (fiber-reinforced polymer) laminates which are due to mismatch their tensile strength stiffness that structure being retrofitted. This paper will describe briefly technology necessary for preparing high-performance fiber-reinforced mixes (HPFRCC), designated...