Abstract
A well-defined singular stress field akin to that of the tensile Mode-I crack-tip region exists next to the contact edge of a flat-tipped cylindrical indenter, from which a new indentation stress intensity factor KIND is introduced in this study. The relationship between the mixed-mode KIND and the common tensile Mode-I stress intensity factor KI has been established by a recent fracture mechanics model. As a result, the fracture toughness KIC commonly measured using large tensile specimens can be determined through indentation tests on small samples from the critical load for ring crack generation at the contact edge. In this study, the new indentation test method and theory are used to estimate the fracture toughness, KIC, of brittle polymers, and the results are compared with those reported in literature. The advantages and disadvantages of the new indentation test method and its applications to brittle polymers are also discussed.
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.
