Issue 28

A. Brotzu et alii, Frattura ed Integrità Strutturale, 28 (2014) 19-31; DOI: 10.3221/IGF-ESIS.28.03

Figure 16 : Load vs displacements plot of the extraction test carriedout without gel lubricant.

Figure 15 : Load vs displacements plot of the extraction test carriedout with gel lubricant.

Figure 17 : Unwinding failuremechanismon instrument no. 9.

Figure 18 :Micro cracks on instrument no. 9 surface.

Figure 19 : Deep cracks of instrument no. 9.

Figure 20 : micro crack of instrument no. 7.

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