Streszczenie: Poddano analizie wpływ grubości próbki, B, na poziom krytycznej wartości odporności na pękanie, KJC. Wykazano, że wartość KJC zależna jest od poziomu wielkości TZ i Q, które charakteryzują stan naprężeń w próbce.
Abstract: Analysed is the influence of a sample thickness, B, on the crack resistance critical value, KJC. There is proved that KJC values are not constant even for the range of thicknesses which meet standard requirements. Ascertained is that KJC value depends on the level of TZ and Q values which characterize stress condition in the sample.
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