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Marion Unwin

Lecturer, Faculty of Engineering

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Research Summary

My current research is concentrated on the development of novel nondestructive evaluation techniques for the characterization of complex materials. The aim is to produce research tools for the study… read more

Recent Publications

Current Research

My current research is concentrated on the development of novel nondestructive evaluation techniques for the characterization of complex materials. The aim is to produce research tools for the study and optimization of such materials together with industrially applicable process monitoring and quality control instrumentation. The systems of interest include the cure of thermosetting polymers such as structural epoxy-based adhesives and multilayered composite structures through to the growth and development of biofilms. The main NDE techniques used are ultrasonic but complementary methods are also used including dielectric, eddy-current and calorimetry.

  • R. E. CHALLIS, F. BLAREL, M.E. UNWIN AND X. GUO, 2011. On the modelling of ultrasonic bulk wave propagation in epoxies Journal of Physics: Conference Series. 269, 1-9
  • AHMAD, I., UNWIN, M., CAO, H., CHEN, H., ZHAO, H., KENNEDY, A., ZHU, Y.Q., 2010. Multi-walled carbon nanotubes reinforced Al2O3 nanocomposites: Mechanical properties and interfacial investigations Composites Science and Technology. 70(8), 1199-1206
  • CHALLIS, RE, BLAREL, F, UNWIN, ME, PAUL, J and GUO, XN, 2009. Models of Ultrasonic Wave Propagation in Epoxy Materials IEEE TRANSACTIONS ON ULTRASONICS FERROELECTRICS AND FREQUENCY CONTROL. 56(6), 1225-1237
  • WANG, YJ, CHALLIS, RE, PHANG, APY and UNWIN, ME, 2009. Bulk Shear Wave Propagation in an Epoxy: Attenuation and Phase Velocity over Five Decades of Frequency IEEE TRANSACTIONS ON ULTRASONICS FERROELECTRICS AND FREQUENCY CONTROL. 56(11), 2504-2513
  • PARRY, J.D., HOLMES, A.K., UNWIN, M.E. and LAYBOURN-PARRY, J., 2007. The use of ultrasonic imaging to evaluate the effect of prorozoan grazing and movement on the topography of bacterial biofilms Letters in Applied Microbiology. 45, 364-370
  • HOLMES, A.K., LAYBOURN-PARRY, J., PARRY, J.D., UNWIN, M.E. and CHALLIS, R.E., 2006. Ultrasonic imaging of biofilms utilizing echoes from the biofilm/air interface IEEE Transactions on Ultrasonics, Ferroelectrics and Frequency Control. 53(1), 185-192
  • KALASHNIKOV, A.N., CHALLIS, R.E., UNWIN, M.E. and HOLMES, A.K., 2005. Effects of frame jitter in data acquisition systems IEEE Transactions on Instrumentation and Measurement. 54(6), 2177-2183
  • CHALLIS, R.E., BLAREL, F., UNWIN, M.E. and KALASHNIKOV, A.N., 2005. Models of ultrasonic bulk wave propagation in thermosets with spatially varying viscoelastic properties In: REVIEW OF PROGRESS IN QUANTITATIVE NONDESTRUCTIVE EVALUATION. 1258-1265
  • KALASHNIKOV, A.N., SHAFRAN, K.L., CHALLIS, R.E., PERRY, C.C., UNWIN, M.E., HOLMES, A.K. and IVCHENKO, V., 2004. Super-resolution in situ ultrasonic monitoring of chemical reactions In: 2004 IEEE ULTRASONICS SYMPOSIUM. 549-552
  • UNWIN, M.E. and CHALLIS, R.E., 2004. Generic representation of cure monitoring data using the time-temperature-transformation (TTT) diagram: Equivalence between dielectric and ultrasonic properties In: REVIEW OF PROGRESS IN QUANTITATIVE NONDESTRUCTIVE EVALUATION. 1514-1520
  • UNWIN, M.E. and CHALLIS, R.E., 2004. Ultrasonic assessment of thermoset cure: Variations in the macromolecular structure due to variations in thickness In: REVIEW OF PROGRESS IN QUANTITATIVE NONDESTRUCTIVE EVALUATION. 1521-1526
  • UNWIN, M.E. and CHALLIS, R.E., 2004. Epoxy thermosets: The detection of adverse stoichiometry using ultrasonic, dielectric and NMR techniques In: REVIEW OF PROGRESS IN QUANTITATIVE NONDESTRUCTIVE EVALUATION. 1129-1134
  • CHALLIS, R.E., UNWIN, M.E., CHADWICK, D.L., FREEMANTLE, R.J., PARTRIDGE, I.K., DARE, D.J. and KARKANAS, P.I., 2003. Following network formation in an epoxy/amine system by ultrasound, dielectric, and nuclear magnetic resonance measurements: a comparative study Journal of Applied Polymer Science. 88(7), 1665-1675
  • KALASHNIKOV, A.N., CHALLIS, R.E., UNWIN, M.E. and HOLMES, A.K., 2003. Quantification of frame jitter in data acquisition systems In: 2003 IEEE INTERNATIONAL SYMPOSIUM ON INTELLIGENT SIGNAL PROCESSING, PROCEEDINGS - FROM CLASSICAL MEASUREMENT TO COMPUTING WITH PERCEPTIONS. 15-20
  • CHALLIS, R.E. and UNWIN, M.E., 2003. The consistency of phenomenological models of ultrasonic wave propagation in a curing thermoset In: REVIEW OF PROGRESS IN QUANTITATIVE NONDESTRUCTIVE EVALUATIO. 1657-1664
  • UNWIN,M.E., 2003. Ultrasonic assessment of thermoset cure: dependence of Tg and crosslink density on thermal history and stoichiometric ratio In: AIP Conference Proceedings.
  • UNWIN, M.E. and CHALLIS, R.E., 2002. Modeling ultrasonic wave propagation in curing thermosets In: 2002 IEEE ULTRASONICS SYMPOSIUM PROCEEDINGS. 827-831
  • UNWIN, M.E. and CHALLIS, R.E., 2002. Ultrasonic cure monitoring of thermosetting materials: Generic data representation using the time-temperature-transformation diagram In: REVIEW OF PROGRESS IN QUANTITATIVE NONDESTRUCTIVE EVALUATION. 1750-1756
  • UNWIN, M.E., HAYCOCK, P.W., HOON, S.R. and GRANNELL, P.K., 1999. A novel broadband ferromagnetic resonance spectrometer Journal of Magnetism and Magnetic Materials. VOL 205(NUMBER 2-3), 199-208

Faculty of Engineering

The University of Nottingham
University Park
Nottingham, NG7 2RD


telephone: +44 (0) 115 951 4163
email:engineering@nottingham.ac.uk