Abstract
Conventional static flexural strength testing of brittle cylindrical rods only subjects a small fraction of the entire specimen's area or volume to the maximum tensile stress. Thus, a nonconservative measured strength likely results since most flaws on the surface or in the bulk are not subjected to a sufficiently high tensile stress that can cause fracture. To mitigate this, a rotational flexural tester and corresponding test method were developed whereby rotation and monotonically increasing three-point flexure were superimposed to investigate fracture response of solid glass cylinders. This combination of rotation and flexure subjects more area and volume of a cylindrical test specimen to tensile stress than a standard static (nonrotating) flexural test. As anticipated, failure stresses were lower for the rotational flexural test. Expressions for effective area and volume are provided for rotating solid rods and tubes subjected to three-point, four-point, uniform, and uniformly distributed load bending configurations.
| Original language | English |
|---|---|
| Pages (from-to) | 4897-4909 |
| Number of pages | 13 |
| Journal | Journal of the American Ceramic Society |
| Volume | 105 |
| Issue number | 7 |
| DOIs | |
| State | Published - Jul 2022 |
Funding
The research was sponsored by the Office of Advanced Reactor Technologies Program, DOE Office of Nuclear Energy, under contract DE‐AC05‐00OR22725 with UT‐Battelle, LLC. The authors thank ORNL's Y. Kato for financial and programmatic support, J. D. Braden for assistance with the fabrication of the rotational tester, S. B. Waters (retired) for imaging support, and J. G. Hemrick, H. Wang, and E. Lara‐Curzio for their reviews and helpful input. University of Tennessee's S. C. Hyde is also thanked for literature assistance. The research was sponsored by the Office of Advanced Reactor Technologies Program, DOE Office of Nuclear Energy, under contract DE-AC05-00OR22725 with UT-Battelle, LLC. The authors thank ORNL's Y. Kato for financial and programmatic support, J. D. Braden for assistance with the fabrication of the rotational tester, S. B. Waters (retired) for imaging support, and J.?G.?Hemrick, H. Wang, and E. Lara-Curzio for their reviews and helpful input. University of Tennessee's S. C. Hyde is also thanked for literature assistance. This manuscript has been authored by UT‐Battelle, LLC under contract number: DE‐AC05‐00OR22725 with the US Department of Energy. The United States Government retains and the publisher, by accepting the article for publication, acknowledges that the United States Government retains a nonexclusive, paid‐up, irrevocable, world‐wide license to publish or reproduce the published form of this manuscript, or allow others to do so, for United States Government purposes. The Department of Energy will provide public access to these results of federally sponsored research in accordance with the DOE Public Access Plan ( http://energy.gov/downloads/doe‐public‐access‐plan ).
| Funders | Funder number |
|---|---|
| Office of Advanced Reactor Technologies Program | |
| U.S. Department of Energy | |
| Office of Nuclear Energy | DE‐AC05‐00OR22725 |
| Oak Ridge National Laboratory | |
| University of Tennessee |
Keywords
- brittle materials
- effective area
- effective volume
- flexure
- rotation
- strength