PSI - Issue 18

Dan Ioan Stoia et al. / Procedia Structural Integrity 18 (2019) 163–169 Dan Ioan Stoia, Liviu Marsavina/ Structural Integrity Procedia 00 (2019) 000–000

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Using the equations 1 and 2 described by Srawley (1976), the fracture toughness K IC was computed, where x represents the ratio between a and W . The validity of K Q was checked using the size criteria and K Q prove to be equal to K IC . � � � � ��� �∙� ��� � ∙ � � (1) � � � � ∙ ��� ∙ ����������������������∙�����∙� � �� ����������� ��� (2)

3. Results and discussions 3.1. Geometrical evaluation

Three linear dimensions were measured on each sample: the total length of the specimen (L), the width (W) and thickness (B). Each measurement was taken three times in order to obtain an average value. Using measured values and nominal (theoretical) value of each dimension, the relative error was computed for L, W and B. The results are graphically presented in Fig. 3

(a)

(b)

(c) (d) Fig. 3 Geometric error and density acording to orientation: a) Relative thickness error; b) Relative length error; c) Relative width error; d) Samples density