PSI - Issue 17

Pavel Konopik et al. / Procedia Structural Integrity 17 (2019) 479–486 Konopik P. et al./ Structural Integrity Procedia 00 (2019) 000 – 000

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evaluated on the basis of crack area measurements performed with digital image processing software, see Fig. 5. The obtained J-R curve are depicted in Fig. 6.

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Fig. 3. Testing set up; (a) 3PB specimen 10x30 mm, (b) 0,16 CT, (c) mini-Charpy specimen (displacement is measured by laser)

Fig. 4. Testing set up; (a) Mini-Charpy specimen, geometry 4 x 3 x 27 mm, (b) Miniature compact tension specimen (0.16 T-CT):

Fig. 5. Digital image processing software; (a) stereo-microscope, (b) example of measured specimen after test