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Title: Adaptation of the chevron-notch beam fracture toughness method to specimens harvested from diesel particulate filters

In this paper, the apparent fracture toughness of a porous cordierite ceramic was estimated using a large specimen whose geometry was inspired by the ASTM-C1421-standardized chevron-notch beam. In this paper, using the same combination of experiment and analysis used to develop the standardized chevron-notch test for small, monolithic ceramic bend bars, an apparent fracture toughness of 0.6 and 0.9 MPa√m were estimated for an unaged and aged cordierite diesel particulate filter structure, respectively. Finally, the effectiveness and simplicity of this adapted specimen geometry and test method lends itself to the evaluation of (macroscopic) apparent fracture toughness of an entire porous-ceramic, diesel particulate filter structure.
 [1] ;  [2] ;  [3] ;  [2] ;  [1]
  1. Materials Science and Technology Division, Oak Ridge National Laboratory, Oak Ridge Tennessee
  2. Department of Engineering, University of Mount Union, Alliance Ohio
  3. Materials Science and Technology Division, Oak Ridge National Laboratory, Oak Ridge Tennessee; Oak Ridge Associated Universities, Oak Ridge, Tennessee
Publication Date:
Grant/Contract Number:
Accepted Manuscript
Journal Name:
International Journal of Applied Ceramic Technology
Additional Journal Information:
Journal Volume: 14; Journal Issue: 3; Journal ID: ISSN 1546-542X
Research Org:
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
Sponsoring Org:
USDOE Office of Energy Efficiency and Renewable Energy (EERE), Vehicle Technologies Office (EE-3V); National Biodiesel Board (NBB) (United States); United Soybean Board (USB) (United States)
Contributing Orgs:
University of Mount Union, Alliance, OH (United States); Oak Ridge Associated Univ., Oak Ridge, TN (United States)
Country of Publication:
United States
36 MATERIALS SCIENCE; fracture mechanics/toughness; porous materials; toughness; diesel particulate filter
OSTI Identifier: