A5056940011- Ultrasonics and Acoustic Wave Propagation
- Composite Structure Analysis and Optimization
- Structural Health Monitoring Techniques
- Structural Load-Bearing Analysis
- Mechanical Behavior of Composites
- Topology Optimization in Engineering
- Innovative Energy Harvesting Technologies
- Non-Destructive Testing Techniques
- Structural Analysis of Composite Materials
- Geophysical Methods and Applications
- Structural Analysis and Optimization
- Smart Materials for Construction
- Mechanical Engineering and Vibrations Research
- Probabilistic and Robust Engineering Design
- Thermography and Photoacoustic Techniques
- Acoustic Wave Phenomena Research
- Aeroelasticity and Vibration Control
- Optical measurement and interference techniques
- Energy Harvesting in Wireless Networks
- Structural Integrity and Reliability Analysis
- Structural Response to Dynamic Loads
- Metal Forming Simulation Techniques
- Advanced Multi-Objective Optimization Algorithms
- Advanced Measurement and Detection Methods
- Wireless Power Transfer Systems
Cardiff University
2016-2025
Physical Sciences (United States)
2025
National Institute of Technology Karnataka
2022
Queen's University
2011-2015
University of Oxford
1998
Mitre (United States)
1992
Johnson Space Center
1992
Classifying the type of damage occurring within a structure using structural health monitoring system can allow end user to assess what kind repairs, if any, that component requires. This paper investigates use acoustic emission (AE) locate and classify in composite, carbon fibre panel during buckling. The was first located bespoke location algorithm developed at Cardiff University, called delta-T mapping. Signals identified as coming from regions were then analysed three AE classification...
In order to overcome the difficulties in applying traditional time-of-arrival techniques for locating acoustic emission events complex structures and materials, a technique termed ‘Delta-t mapping’ was developed. This article presents significant improvement on this, which identifying precise arrival time of an signal are addressed by incorporating Akaike information criteria. The performance arrival, Delta-t mapping criteria is assessed artificial sources, fatigue damage impact aluminium...
Abstract S2 glass fibre reinforced epoxy composites are widely used in aeronautical applications owing to their excellent strength weight ratio. Drilling fibres can be cumbersome due abrasive nature and poor thermal conductivity. Moreover, the use of conventional coolants is not desirable contamination additional costs for cleaning machine part. An alternative environmentally friendly such as liquid nitrogen (LN 2 ) which have been previously employed machining metals composites. The current...
The double–double (DD) laminate families that contain two continuous angles, which were proposed by Tsai (“Double–Double: New Family of Composite Laminates,” AIAA Journal, Vol. 59, No. 11, 2021, pp. 4293–4305), opened up a whole new era for composite layups, are easy to manufacture and design. In the present study, design space referred as feasible regions is derived explicitly based on novel formulations lamination parameters DD laminates. This enables boundaries be obtained analytically,...
Shape, thickness and stacking sequence optimisation of a damage tolerant hybrid (GFRP-CFRP) composite laminate is performed using the commercial Optistruct solver. The results study are compared to both benchmark non-damage CFRP (without protective surface GFRP plies known as type 1 laminate) traditionally optimised CFRP-GFRP (having X shape 2 laminate), designed tested in previous study. manufactured three different manufacturing techniques. experimental buckling post-buckling performance...
This study introduces a novel computational framework for Robust Topology Optimization (RTO) considering imprecise random field parameters. Unlike the worst-case approach, present method provides upper and lower bounds mean standard deviation of compliance as well optimized topological layouts structure various scenarios. In proposed variables are determined utilizing parameterized p-boxes with different confidence intervals. The Karhunen–Loève (K–L) expansion is extended to provide spectral...
This study presents a numerical modelling framework based on complex variable meshless methods, which can accurately and efficiently track arbitrary crack paths in two-dimensional linear elastic solids. The key novelty of this work is that the proposed scheme enables direct element-free approximation for solutions fracture mechanics problems. moving least-squares with group simple polynomial basis applied to implement model, problems both stationary or progressive cracks are considered...
Recent research into damage detection methodologies, embedded sensors, wireless data transmission and energy harvesting in aerospace environments has meant that autonomous structural health monitoring (SHM) systems are becoming a real possibility. The most promising system would utilise sensor nodes able to make decisions on communicate this wirelessly central base station. Although such shows great potential both passive active techniques exist for detecting structures, powering sensors...
There are many advantages to adhesively bonding stiffeners onto aircraft structures rather than using traditional mechanical fastening methods. However there is a lack of confidence the structural integrity bonded joints over time. Acousto-ultrasonic Lamb waves have shown great potential in health monitoring applications both metallic and composite structures. This paper presents an experimental investigation use acousto-ultrasonic for 3D scanning laser vibrometry. Two stiffened panels were...
Aircraft structures exhibit localized vibrations over a wide range of frequencies. Such can be used to power sensors which then monitor the health structure. Conventional vibrational piezoelectric harvesting involves optimizing harvester for one distinct frequency. The aim this work is design wireless system capable energy in 100–500 Hz by tailoring resonant behavior cantilever structures. We herein employ model predicting performance retrofit on structural monitoring sensor and formulate...
Abstract This paper investigates the weight minimization of stiffened panels simultaneously optimizing sizing, layout, and topology under stress buckling constraints. An effective optimization parameterization is presented using multiple level-set functions. Plate elements are employed to model panels. The stiffeners parametrized by implicit internal topologies optimized as well their layout. A free-form mesh deformation approach improved adjust finite element mesh. Sizing also included....
Simultaneous layout and topology optimization of stiffened panels is investigated in this paper using a new level-set-based method. Specifically, plate elements are used to construct panel structure. The level set method then manipulate the stiffener layout, with curved members allowed. A free-form mesh deformation control adjust finite element mesh. also optimize internal topologies stiffeners. Both mass minimization buckling constraint critical load factor maximization investigated....