PSI - Issue 3

Stavros K. Kourkoulis et al. / Procedia Structural Integrity 3 (2017) 316–325 S. K. Kourkoulis and I. Dakanali / Structu al Integrity Procedia 00 (2017) 000–000

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(c)

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Fig. 6. The position of the acoustic sensors.

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Fig. 7. Application of the Digital Image Correlation technique. linear one and then characteristic plateaus appear where the both “deformations” increases under almost constant load. It is mentioned, however, that the plateau for the deflection is observed at a load level equal to about 330 kN, immediately after the non-linear portion. On the contrary, the plateau for the opening of the crack (fracture) is observed after a sudden load drop from 330 kN to about 300 kN. The overall response of the epistyle as it is described by Fig.8b is an indication of (at least partial) successful restoration given that for almost 75% of the maximum load attained (370 kN) the response is linear concerning both the deflection an the distance between the two fragments. (a) (b)

Fig. 8. (a) The deflection at the mid-section and the fault’s opening vs. time; (b) The load applied vs. central deflection and fault’s opening.