Issue 57

A. Kusch et alii, Frattura ed Integrità Strutturale, 57 (2021) 331-349; DOI: 10.3221/IGF-ESIS.57.24

Specimen Geometry Control group (i.e. unnotched straight specimens) geometry is derived from ISO 527 [17]. Three different notch opening angles are considered (2  =45°, 60°, 90°) and two different notch root radii  =1 and 0 mm (the minimal radius achievable with the capability of the manufacturing process).

Figure 2: Specimens geometry (2  . =45°,60°,90°). Series of specimens are labeled according to the opening angle and radius: V45R0, V60R0, V90R0, V45R1, V60R1, V90R1 and STR being the unnotched set. For each series 5 specimens are produced. Manufacturing tolerances are checked using measurements from a Leica DM ML (Leica Camera AG, Wetzlar, DE) optical microscope image data. Three other types of blunt notched specimen are considered as validation set, with 2  =90° and  =0.5,2,3 mm. For  =0.5 mm, a geometry similar to the one proposed by Campagnolo and Berto [9] is examined.

Figure 3: Specimens geometry for validation.

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