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Article
Open AccessIdentification of Lightning Strike Damage Severity Using Pulse Thermography Through Integration of Thermal Data
Carbon fibre reinforced polymers (CFRP) structures, e.g., wind turbine blades, are suspectable to direct lightning strikes due to their semiconductive nature and ability to conduct current. It is critical to i...
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Article
Open AccessQuantitative Full-Field Data Fusion for Evaluation of Complex Structures
Validation of models using full-field experimental techniques traditionally rely on local data comparisons. At present, typically selected data fields are used such as local maxima or selected line plots. Here...
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Chapter and Conference Paper
Identification of Subsurface Damage in Multidirectional Composite Laminates Using Full-Field Imaging
Detection of subsurface damage in composite structures is essential for assessing performance and identifying regions for repair. Thermoelastic stress analysis (TSA) is a full-field infrared imaging technique ...
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Article
On the Effect of Dielectric Breakdown in UD CFRPs Subjected to Lightning Strike Using an Experimentally Validated Model
To meet worldwide increases in energy demands Wind Turbine (WT) manufacturers are producing turbines with longer blades to generate more electrical energy. To lightweight these blades, Carbon Fibre Reinforced ...
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Chapter and Conference Paper
Towards Integrating Imaging Techniques to Assess Manufacturing Features and In-Service Damage in Composite Components
Initial work on combining Thermoelastic Stress Analysis (TSA) and Digital Image Correlation (DIC) is presented with the purpose of exploring their used in assessing defects in composite materials. TSA is usual...
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Article
Interfacial Crack Arrest in Sandwich Panels with Embedded Crack Stoppers Subjected to Fatigue Loading
A novel crack arresting device has been implemented in sandwich panels and tested using a special rig to apply out-of-plane loading on the sandwich panel face-sheets. Fatigue crack propagation was induced in t...
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Chapter and Conference Paper
Experimental and Numerical Investigation of Novel Crack Stopper Concepts for Lightweight Foam Cored Sandwich Structures
Three novel crack stopper designs for foam cored composite sandwich structures have been investigated with respect to their ability to deflect and arrest propagating face debond cracks. One of the new crack st...
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Article
A Methodology for Characterizing the Interfacial Fracture Toughness of Sandwich Structures using High Speed Infrared Thermography
An experimental method is proposed for obtaining the fracture toughness of an interfacial crack in sandwich structures. The method relates the interfacial fracture toughness with temperature change developed a...
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Article
Interfibre Failure Characterisation of Unidirectional and Triax Glass Fibre Non-Crimp Fabric Reinforced Epoxy Laminates
The in-plane failure envelopes of unidirectional (UD) laminae in a UD and a Triax (0°, ±45°) laminate configuration have been investigated. The two laminate configurations have been characterised by testing of...
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Chapter and Conference Paper
Uncertainty Quantification in VFM Identification
This article presents a methodology to optimize the design of a mechanical test to characterize all the material stiffness parameters of a PVC foam material in one single test. The two main experimental techni...
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Chapter and Conference Paper
Experimental Characterization of Thermomechanically Induced Instability in Polymer Foam Cored Sandwich Structures
This paper presents a primarily experimental investigation of the instability behaviour of polymer foam cored sandwich structures loaded at elevated temperatures. An experimental setup was designed to induce t...
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Article
Identification of Material Parameters of PVC Foams using Digital Image Correlation and the Virtual Fields Method
This paper presents an effective methodology to characterize all the constitutive (elastic) parameters of an orthotropic polymeric foam material (Divinycell H100) in one single test using Digital Image Correla...
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Chapter and Conference Paper
Characterization of Compressive Properties of Polymer Foam Materials Using DIC and a Modified Arcan Fixture
A modified Arcan fixture (MAF) has been developed to characterize polymer foam materials with respect to their tensile, compressive, shear and bidirectional mechanical properties at room and at elevated temper...
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Article
Series solution for large deflections of a cantilever beam with variable flexural rigidity
In this paper large deflection and rotation of a nonlinear Bernoulli-Euler beam with variable flexural rigidity and subjected to a static co-planar follower loading is studied. It is assumed that the angle of ...
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Article
A Methodology for Obtaining Material Properties of Polymeric Foam at Elevated Temperatures
A new methodology to characterise the elastic properties of polymeric foam core materials at elevated temperatures is proposed. The focus is to determine reliable values of the tensile and compressive moduli a...
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Chapter and Conference Paper
Bidirectional Thermo-Mechanical Properties of Foam Core Materials Using DIC
Polymer foam cored sandwich structures are often subjected to aggressive service conditions which may include elevated temperatures. A modified Arcan fixture (MAF) has been developed to characterize polymer fo...
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Chapter and Conference Paper
Experimental investigation of thermal effects in foam cored sandwich beams
Polymer foam cored sandwich structures are commonly used in applications where mechanical loads and elevated temperatures form the normal service conditions. The temperature sensitivity of the mechanical prope...
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Chapter and Conference Paper
Quasi-Static Testing of New Peel Stopper Design for Sandwich Structures
A sandwich material is a layered assembly made of two thin strong face sheets separated by and bonded to a compliant lightweight core. This provides a lightweight structural element with very high bending stif...
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Chapter and Conference Paper
Thermoelastic Stress Analysis of Sandwich Structures With Core Junctions
A sandwich structure is a layered composite element with two relatively thin and strong outer layers, known as the face sheets, and a relatively thick and lightweight inner layer, known as the core. The sandwi...
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Chapter and Conference Paper
Cohesive Laws of Ductile Adhesives: an Experimenal Study
The evolution of adhesive bonding technology and its current knowledge base was made possible by the rapid growth of adhesive applications in a great variety of industries in the past few decades. Adhesive joi...
