Determination of the stress intensity factor by methods of photoelastic simulation.

Autor: Ostsemin, A., Deniskin, S., Sitnikov, L.
Zdroj: Strength of Materials; Jan1990, Vol. 22 Issue 1, p39-45, 7p
Abstrakt: Various methods of determination of stress intensity factors from the patterns of the isochromes, the isopachs, and the absolute differences in shape at the tip of a notch are analyzed. The range of extrapolation of the values of K within which the theoretically obtained stress distributions coincide with the stresses measured experimentally on a model with a finite radius of the stress raiser tip is established. Determination of the parameter K from the patterns of absolute differences of the shape is significantly more complex than from the patterns of the isochromes and isopachs but is justified on models of a high-modulus material when increased accuracy, reliability of the results, and an analysis of the stressed and strained state of a specimen with separation of the main stresses are necessary. [ABSTRACT FROM AUTHOR]
Databáze: Complementary Index
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