Abstract
Resistance to slow fatigue crack propagation in polycarbonate is investigated with respect to specimen thickness. In the thickness range considered (0.33–3.22 mm), microscopic analysis reveals that a zone of yielded material constitutes the resistance to crack propagation. As the sheet thickness is increased, the amount of yielded material per unit crack surface is reduced. Consequently, faster crack growth rates are observed with increasing specimen thickness. Crack layer theory is applied to analyse crack propagation kinetics and stability. Accordingly, a specific enthalpy of damage (yielding) is found constant for the thickness range considered and is equal to 60 J g−1 . It is further noticed that as the thickness increases, resistance to crack initiation increases.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
