Abstract
The influence of notches on the static tensile strength was studied for selected polymeric materials. The tension tests on the grooved shafts have been carried out for a wide range of notch tip radii and depths. The materials used were the following seven kinds of thermoplastics; PC, PVC, PMMA, ABS, Nylon 66, PP and PE. The sharply notched specimens failed in a brittle manner and the bluntly notched specimens failed in a ductile manner for all the materials except PMMA. All the notched specimens of PMMA failed in a brittle manner. The predominant factor for determining the brittle-ductile transition of the fracture mode was the notch tip radius. The experimental results were discussed in terms of a relation between the maximum elastic stress at the notch tip, σmax, and the notch tip radius. In the case of brittle fracture, it has been verified that the σmax at which the specimen failed is governed by the notch tip radius alone and is independent of notch depth for all the specimens. On the basis of the concept of linear notch mechanics, the experimental results mentioned above could be clearly explained and the limiting condition for fracture of the grooved shafts of rigid plastics was expressed. The condition is applicable commonly to seven kinds of thermoplastics.
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 callMore From: Journal of the Society of Materials Science, Japan
Disclaimer: 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.
