Experimental Errors in Modulus of Rupture Test Fixtures

Green strength testing of pressed compacts: An analysis of the different methods

“…Similarly, certain deficiencies or errors associated with bend tests, such as the unequal distribution of moments, twisting or wedging, occur more frequently and their effect is much more critical in the 4B than in the 3B test. 43 The values of the ratiosσ d 3B /σ d 4B andσ Table 3, obtained by fitting the individual mechanical strength values to Eq. (2), which depended on the type of test and did not display a logi- Indeed, in accordance with the Weibull theory, m c increases (1/m c decreases) as piece compactness, ф, increases, piece compactness being directly related to the material's microstructural homogeneity.…”