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

Journal Article · · International Journal of Applied Ceramic Technology
DOI:https://doi.org/10.1111/ijac.12653· OSTI ID:1343531
 [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
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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.

Research Organization:
Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)
Sponsoring Organization:
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 Organization:
University of Mount Union, Alliance, OH (United States); Oak Ridge Associated Univ., Oak Ridge, TN (United States)
Grant/Contract Number:
AC05-00OR22725
OSTI ID:
1343531
Journal Information:
International Journal of Applied Ceramic Technology, Vol. 14, Issue 3; ISSN 1546-542X
Publisher:
WileyCopyright Statement
Country of Publication:
United States
Language:
English

References (13)

Failure Stress and Apparent Elastic Modulus of Diesel Particulate Filter Ceramics journal April 2012
A 3-D finite element analysis of a chevron-notched, three-point bend fracture specimen for ceramic materials journal August 1987
The effect of porosity and microcracking on the thermomechanical properties of cordierite journal December 2015
The Thermal Expansion, Elastic and Fracture Properties of Porous Cordierite at Elevated Temperatures journal March 2012
Stress Intensity Factor Coefficients for Chevron-Notched Flexure Specimens and a Comparison Fracture Toughness Methods
  • Salem, Jonathan; Ghosn, Louis; Jenkins, Michael
  • 23rd Annual Conference on Composites, Advanced Ceramics, Materials, and Structures: A: Ceramic Engineering and Science Proceedings https://doi.org/10.1002/9780470294567.ch58
book January 1999
Fracture Toughness of Porous Cordierite
  • Shyam, Amit; Lara-Curzio, Edgar; Lin, Hua-Tay
  • Mechanical Properties and Performance of Engineering Ceramics II: Ceramic Engineering and Science Proceedings, Volume 27, Issue 2 https://doi.org/10.1002/9780470291313.ch7
book January 2006
Young’s modulus and Poisson’s ratio changes due to machining in porous microcracked cordierite journal July 2016
Mechanical Characterization of Diesel Particulate Filter Substrates journal June 2008
Impact of Biodiesel Impurities on the Performance and Durability of DOC, DPF and SCR Technologies journal April 2011
The fracture toughness of a cordierite square lattice journal January 2010
Evaluation of Fuel-Borne Sodium Effects on a DOC-DPF-SCR Heavy-Duty Engine Emission Control System: Simulation of Full-Useful Life journal April 2016
Numerical Fracture Analysis of Chevron-Notched Specimens: I, Shear Correction Factor, k journal May 1983
The Relationship Between Microstructure and Fracture Toughness for Fibrous Materials for Diesel Particulate Filters journal April 2010

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36 MATERIALS SCIENCE
fracture mechanics/toughness
porous materials
toughness
diesel particulate filter