SEVNB method

Kuebler, J., Fracture toughness using the SEVNB method preliminary results, Ceram. Eng. Sci. Proc., 18, 155-162, 1997. 

Kuebler, J., Fracture toughness of ceramics using the SEVNB method from a preliminary study to a standard test method, in Fracture Resistance Testing of Monolithic and Composite Brittle Materials, ASTM STP 1409, ed. J.A. Salem, M.G. Jenkins and G.D. Quinn, ASTM, West Conshohocken, PA, pp. 93-106, January 2002. 

ISO 23146, Fine ceramics (advanced, advanced technical ceramics) - Test methods for toughness of monolithic ceramics - Single-edge V-notched beam (SEVNB) method, (2008). 

FIGURE 9. Fracture toughness as a fimction of alumina content for lO-YSZ/alumina particulate and platelet composites, determined by the SEVNB method at room temperature [2, 4]. Error bars indicate +1.0 standard. 

ISO (2007) DIS 23146. Fine Ceramics (Advanced Ceramics, Advanced Technical Ceramics) — Determination of Fracture Toughness of Monolithic Ceramics at Room Temperature by the Sin e-edge Vee-notched Beam (SEVNB) Method, International Organization for Standardization. 

Kiibler, J. (1999) Fracture toughness of ceramics using the SEVNB method Roimd Robin, ESIS Document D2-99, EMPA. 

Analysis of the data of the fractured specimens reveals that a fracture crack propagated from the points where additional stress concentrations were present. This confirms the assumption that the fracture of a loaded ceramic specimen starts from a small crack ahead of a machined notch root. It is beheved that is influenced more by the sharpness of the notch root, rather than by its shape. The data in Table 2.1 are from three to four-point flexure tests performed on several monolithic ceramics. Table 2.2 shows the Kic values at RT and high temperatures attained by the SEVNB method for these notched specimens. 

Table 2.2 High temperature fracture toughness test results (SEVNB method) [17] (with kind ...

Figure 4. (a) A schematic geometry of double cantilever beam (DCB) test specimens used to determine Kic in the plane perpendicular to the plasma sprayed (PS) direction, (b) Regular fracture toughness testing by the SEVNB method with crack planes parallel to the plasma spraying direction is shown for... 

J. J. Kubler, Fracture Toughness of Ceramics Using the SEVNB Method Preliminary Results, Ceramic Engineering and Science Proceedings, 18 (4) 155 162 (1997). 

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