Webinar - 15 April 2026
Prof. Janice Barton (University of Bristol)
Location: Online via Zoom
Date: Wednesday, 15 April 2026
Time: 4:00PM - 5:00PM GMT
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About the talk:
Integrating thermal imaging and digital image correlation to characterise defects and material properties in CFRP materials
A significant challenge exists in the application of an infra-red imaging processing approach known as Thermoelastic Stress Analysis (TSA) to Carbon Fibre Reinforced Polymer (CFRP) components. It has been shown the stress induced temperature change resulting from the thermoelastic coupling, is heavily influenced by heat transfer. The conclusion may be that quantitative TSA on laminated CFRP component is not possible. Both in-plane and through the thickness heat conduction occurs, which is driven by the stress gradients in a structural component. The through thickness thermal conduction occurs in multidirectional laminates mainly because of the step changes in the stresses at the ply interfaces. The conduction is dependent on the ply thickness, the ply orientation, the paint coating thickness and the thickness of the resin rich surface layer (RRL) resulting from the manufacturing process. Even in unidirectional (UD) CFRP materials the paint and the RRL have a significant effect on the response. In the presentation it is demonstrated that heat transfer enables characterisation of sub surface damage and defects, as well as enabling a novel means of determining the material coefficients of thermal expansion.
About the speaker:
Janice Dulieu-Barton is a Professor of Experimental Mechanics in the Bristol Composites Institute at the University of Bristol, where she is the Director of the EPSRC Centre for Doctoral Training in Innovation for Sustainable Composites Engineering and the Industrial Doctorate Centre in Composites Manufacture. Janice received her PhD in 1993 from Manchester University researching the topic now known as ‘thermoelastic stress analysis’. She has published around 500 papers with 150 in archival journals. Janice’s expertise is in imaging for data rich material characterisations and structural integrity assessments, with a focus on creating new measurement methodologies using Infra-Red (IR) imaging. She has won numerous grants that have allowed her to develop novel approaches in experimental mechanics, most recently focusing on integration of flexible photonics into composite structures with collaborators at the University of Southampton.
Past Webinars
"X-ray CT in academia, government, and industry: Current and future systems and applications"
Harry E. Martz, Jr.
Tuesday, 20 January 2026
About the speaker
Harry E. Martz, Jr.
(Lawrence Livermore National Laboratory)
Harry Martz is the Director for Non-destructive Characterization Institute and a distinguished member of the technical staff at Lawrence Livermore National Laboratory and is a Professor of Practice at the University of California San Diego. Harry is leading a team of scientists and engineers to research, develop and apply nondestructive characterization systems and methods to better understand material properties and inspection of components and assemblies. He has applied x-ray CT to inspect millimeter sized laser targets, automobile and aircraft components, high explosives, explosive shaped charges, concrete, and non-destructive radioactive assay of waste drum contents. Recent R&D efforts include CT imaging for conventional and homemade explosives detection in luggage and radiographic imaging of cargo to detect special nuclear materials and radiological dispersal devices. Dr. Martz has authored or co-authored over 300 papers. Harry and colleagues published a book on X-ray Imaging: Fundamentals, Industrial Techniques and Applications. He has also served on several National Academy of Sciences Committees on Aviation Security and was the Chair of the Committee on Airport Passenger Screening: Backscatter X-Ray Machines. Harry has been co-chair of the Awareness and Localization of Explosives-Related Threats, Advanced Development for Security Applications Workshops. Harry received an R&D Magazine 100 Award for his work on a mobile CT system to nondestructively assay waste drums at Department of Energy sites around the country. He received his M.S. and Ph.D. in Nuclear Physics/Inorganic Chemistry from Florida State University, and his B.S. in Chemistry with a physics minor from Siena Collage.
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