Stephen Grigg
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View article: Sound-Induced Vibrations as a Potentially Damaging Risk to Museum Collections
Sound-Induced Vibrations as a Potentially Damaging Risk to Museum Collections Open
Previous research on the potentially damaging effects of vibration on cultural heritage items has largely focussed on earthquakes, road and rail traffic, and heavy construction activities. Comparatively little attention has been paid to vi…
View article: A Comparison of Two Types of Acoustic Emission Sensors for the Characterization of Hydrogen-Induced Cracking
A Comparison of Two Types of Acoustic Emission Sensors for the Characterization of Hydrogen-Induced Cracking Open
Acoustic emission (AE) technology is a non-destructive testing (NDT) technique that is able to monitor the process of hydrogen-induced cracking (HIC). AE uses piezoelectric sensors to convert the elastic waves generated from the growth of …
View article: Investigation of delta-t mapping source location technique based on the arrival of A0 modes
Investigation of delta-t mapping source location technique based on the arrival of A0 modes Open
The main assumptions made for traditional Time of Arrival (TOA) source location techniques are constant wave speed and straight wave path between the acoustic emission (AE) source and the sensors. However, because of material inhomogeneity…
View article: Hydrogen induced cracks monitored with acoustic emission under the laboratory condition
Hydrogen induced cracks monitored with acoustic emission under the laboratory condition Open
Hydrogen induced cracking (HIC) is a common form of failure in steel exposed to hydrogen rich environments, which always occurs inside material making their detection difficult. Acoustic Emission (AE) is a promising Nondestructive Evaluati…
View article: Characterization and early detection of hydrogen embrrittlement in offshore bolts using acoustic emission
Characterization and early detection of hydrogen embrrittlement in offshore bolts using acoustic emission Open
In this project the non-destructive testing technique of acoustic emission testing will be used to determine the location of hydrogen embrittlement within offshore bolts. An initial testing plan has been provided which outlines that a fati…
View article: Comparison of numerical analyses of a composite wing component subjected to 4-point bending
Comparison of numerical analyses of a composite wing component subjected to 4-point bending Open
In this paper, a comparison between six finite element models of a representative wing structural component performed in the context of Optimised Design for Inspection (ODIN) project of the European Cooperation in Science and Technology (C…
View article: Acoustic Emission Source Location Using Finite Element Generated Delta-T Mapping
Acoustic Emission Source Location Using Finite Element Generated Delta-T Mapping Open
One of the most significant benefits of Acoustic Emission (AE) testing over other Non-Destructive Evaluation (NDE) techniques lies in its damage location capability over a wide area. The delta-T mapping technique developed by researchers h…
View article: The Latest Advances in Wireless Communication in Aviation, Wind Turbines and Bridges
The Latest Advances in Wireless Communication in Aviation, Wind Turbines and Bridges Open
Present-day technologies used in SHM (Structural Health Monitoring) systems in many implementations are based on wireless sensor networks (WSN). In the context of the continuous development of these systems, the costs of the elements that …
View article: Acoustic Sensing and Noise Identification of a Heating, Ventilation and Air Conditioning Unit: Industrial Case Study
Acoustic Sensing and Noise Identification of a Heating, Ventilation and Air Conditioning Unit: Industrial Case Study Open
Reducing the noise and improving the sound quality of vehicles’ interior space is one of the challenges to enhance passengers’ experience. This is an ever-growing issue as entirely electric cars are becoming commonplace, making previously …
View article: An Assessment of the Effect of Progressive Water Absorption on the Interlaminar Strength of Unidirectional Carbon/Epoxy Composites Using Acoustic Emission
An Assessment of the Effect of Progressive Water Absorption on the Interlaminar Strength of Unidirectional Carbon/Epoxy Composites Using Acoustic Emission Open
Carbon Fibre-Reinforced Polymers (CFRPs) in aerospace applications are expected to operate in moist environments where carbon fibres have high resistance to water absorption; however, polymers do not. To develop a truly optimised structure…
View article: Impact monitoring of CFRP composites with acoustic emission and laser Doppler vibrometry
Impact monitoring of CFRP composites with acoustic emission and laser Doppler vibrometry Open
The use of Acoustic Emission (AE) to detect impacts is of interest within industries where vital components are prone to impact damage, in particular where Carbon Fibre Reinforced Polymers (CFRP) are used, as damage can often go un-noticed…
View article: Development of a low‐power wireless acoustic emission sensor node for aerospace applications
Development of a low‐power wireless acoustic emission sensor node for aerospace applications Open
Acoustic emission (AE) is the spontaneous release of energy caused by the growth of damage, the monitoring of which gives an indication of the presence of damage within a structure. The current standard for AE localisation is difficult to …
View article: Aerospace Requirements
Aerospace Requirements Open
This chapter covers the overview of requirements arising in the aerospace industry for operating a structural health monitoring (SHM) system. The requirements are based on existing standards and guidelines and include both requirements on …
View article: Noise pollution: acute noise exposure increases susceptibility to disease and chronic exposure reduces host survival
Noise pollution: acute noise exposure increases susceptibility to disease and chronic exposure reduces host survival Open
Anthropogenic noise is a pervasive global pollutant that has been detected in every major habitat on the planet. Detrimental impacts of noise pollution on physiology, immunology and behaviour have been shown in terrestrial vertebrates and …
View article: THE INFLUENCE OF WATER ABSORPTION ON THE DAMAGE MECHANISM OF UNIDIRECTIONAL AND 2D WOVEN CFRP
THE INFLUENCE OF WATER ABSORPTION ON THE DAMAGE MECHANISM OF UNIDIRECTIONAL AND 2D WOVEN CFRP Open
This study presents the influence of water exposure on unidirectional, plain weave, and twill weave CFRP particularly in the interfacial region with the use of acoustic emission, optical strain measurement, and scanning electron microscope.
View article: Development of a wireless structural health monitoring system for aerospace application
Development of a wireless structural health monitoring system for aerospace application Open
Structural health monitoring has a number of benefits to the aircraft industry, including improvements to safety, reduction in maintenance costs and potential weight savings. One reason why the aircraft industry is reluctant to apply such …