Rate, temperature and their coupled effects on the deformation process of polycarbonate and its composite

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• Peihao Song, Department of Engineering Science, The University of Oxford
• Thursday 24 October 2024, 15:00-16:00
• Mott Seminar Room, Cavendish Laboratory.

If you have a question about this talk, please contact Stephen Walley.

Livestream using Teams. Meeting ID: 315 430 872 95. Passcode: JCk2AZ

Polycarbonate, a widely used glassy thermoplastic polymer, is essential for applications requiring high strain rate performance. Despite its common use, there are gaps in understanding its performance, particularly regarding adiabatic heating effects. This research provides comprehensive experimental characterization of polycarbonate, integrating experimental and modelling efforts. Key achievements include: (1) a detailed assessment of quasi-static tensile tests, incorporating full-field strain and temperature measurements for more accurate material model calibration; (2) comparative compressive characterization of four polycarbonate materials under varied strain rates and temperatures, revealing the interplay of these conditions; (3) unique measurements of temperature rises during deformation in adiabatic conditions across a range of starting temperatures, quantifying the effect on the Taylor Quinney Coefficient; and (4) the use of thermal and X-ray imaging to understand damage formation in short-fiber filled polycarbonate at high strain rates. This research enhances understanding of polycarbonate materials at high rates, aiding the development of constitutive models over various temperatures and strain rates.

This talk is part of the Physics and Chemistry of Solids Group series.

This talk is included in these lists:

• All Cavendish Laboratory Seminars
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• Centre for Health Leadership and Enterprise
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• ME Seminar
• Mott Seminar Room, Cavendish Laboratory
• Neurons, Fake News, DNA and your iPhone: The Mathematics of Information
• Physics and Chemistry of Solids Group
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