Issue 42

M. Peron et alii, Frattura ed Integrità Strutturale, 42 (2017) 214-222; DOI: 10.3221/IGF-ESIS.42.23 221 A CKNOWLEDGMENTS he experimental results presented here were performed under the Grant of the Romanian National Authority for Scientific Research, CNCS-UEFISCDI, project PN-II-ID-PCE-2011-3-0456, contract number 172/2011. Mr. Alberto Piccotin was supported by ERASMUS program to carry on a research stage at University Politehnica Timisoara. R EFERENCES [1] http://www.necumer.com/index.php/en/produkte-2/board-materials.html, (2014). [2] Gibson, L.J., Ashby, M.F., Cellular Solids, Structure and Properties, second ed., Cambridge University Press, (1997). [3] Ashby, M.F., Cellular solids – scaling of proprieties, in: M. Scheffler, P. Colombo (Eds.), Cellular Ceramics, Structure, Manufacturing, Properties and Applications, Wiley-VCH Verlag Gmbh & Co., (2005) 3–17. [4] Marsavina, L., Fracture mechanics of cellular solids, in: H. Altenbach, A. Ochsner (Eds.), Cellular and Porous Materials in Structures and Processes, Springer, Wien, (2010) 1–46. [5] Lazzarin, P., Comportamento a fatica dei giunti saldati in funzione della densità di energia di deformazione locale: influenza dei campi di tensione singolari e non singolari, Frattura ed Integrità Strutturale, 9 (2009) 13-26. [6] Maragoni, L., Carraro, P. A., Peron, M. and Quaresimin, M., Fatigue behaviour of glass/epoxy laminates in the presence of voids, Int. J. Fatigue, 95 (2017) 18–28. [7] Brotzu, A., Felli, F. and Pilone, D., Effects of the manufacturing process on fracture behaviour of cast TiAl intermetallic alloys, Frattura ed Integrità Strutturale, 27 (2013) 66-73. [8] Ayatollahi, M.R., Razavi, S.M.J., Rashidi Moghaddam, M., Berto, F., Mode I fracture analysis of Polymethylmetacrylate using modified energy—based models. Phys. Mesomec., 18 (2015) 53-62. [9] Ayatollahi, M.R., Rashidi Moghaddam, M., Razavi, S.M.J., Berto, F., Geometry effects on fracture trajectory of PMMA samples under pure mode-I loading. Eng. Fract. Mech., 163 (2016) 449–461. [10] Ayatollahi, M.R., Razavi, S.M.J., Sommitsch, C., Moser, C., Fatigue life extension by crack repair using double stop- hole technique, Mater. Sci. Forum, 879 (2017) 3-8. [11] Razavi, S.M.J., Ayatollahi, M.R., Sommitsch, C., Moser, C., Retardation of fatigue crack growth in high strength steel S690 using a modified stop-hole technique, Eng. Fract. Mech., 169 (2017) 226–237. [12] Rashidi Moghaddam, M., Ayatollahi, M.R., Razavi, S.M.J., Berto, F., Mode II Brittle Fracture Assessment Using an Energy Based Criterion, Phys. Mesomec. (in press). [13] Sih, G.C., Some basic problems in fracture mechanics and new concepts, Eng. Fract. Mech., 5 (1973) 365-377. [14] Sih, G.C., Strain-energy-density factor applied to mixed mode crack problems, Int. J. Fracture, 10 (1974) 305-321. [15] Kipp, M.E., Sih, G.C., The strain energy density failure criterion applied to notched elastic solids, Int. J. Solids Struct., 11 (1975) 153-173. [16] Sih, G.C., Ho, J.W., Sharp notch fracture strength characterized by critical energy density, Theor. Appl. Fract. Mec., 16 (1991) 179-214. [17] Lazzarin, P. and Zambardi, R., A finite-volume-energy based approach to predict the static and fatigue behavior of components with sharp V-shaped notches, Int. J. Fract., 112 (2001) 275–298. [18] Berto, F., Lazzarin, P. and Ayatollahi, M. R., Brittle fracture of sharp and blunt V-notches in isostatic graphite under torsion loading, Carbon N. Y., 50 (2012) 1942–1952. [19] Berto, F. and Barati, E., Fracture assessment of U-notches under three point bending by means of local energy density, Mater. Des., 32 (2011) 822–830. [20] Radaj, D., Berto, F., and Lazzarin, P., Local fatigue strength parameters for welded joints based on strain energy density with inclusion of small-size notches, Eng. Fract. Mech., 76 (2009) 1109–1130. [21] Lazzarin, P., Berto, F., Some expressions for the strain energy in a finite volume surrounding the root of blunt V- notches, Int. J. Fract., 135 (2005) 161-1 85. [22] Gómez, F.J., Elices, M., Berto, F., Lazzarin, P., Local strain energy to assess the static failure of U-notches in plates under mixed mode loading, Int. J. Fract., 145 (2007) 29-45. [23] Berto, F., Lazzarin, P., Gómez, F.J., Elices, M., Fracture assessment of U-notches under mixed mode loading: two procedures based on the ‘equivalent local mode I’ concept, Int. J. Fract ., 148 (2007) 415-433.