Issue 31

J. Lopes et alii, Frattura ed Integrità Strutturale, 31 (2015) 67-79; DOI: 10.3221/IGF-ESIS.31.06 75 Numerical Results From the finite element model the displacement and the reaction force of the loading member were extracted. From these two data sets the apparent inter-laminar shear stress was calculated using Eq. (2) and (3) for the reference beam and the hybrid beam respectively. Tab. 4 presents the numerical results and compares them with the experimental results. In the upper part of the table is the average experimental ILSS and the numerical ILSS for several values of G IIC of the reference beam. Similarly in the lower part of the table is the average ILSS and the numerical ILSS for several values of G IIC of the vacuum blasting tests. Reference Beam ILSS (MPa) Difference Experimental 130.03 - Numerical G IIC =1.1 N.mm -1 132.90 2.2% G IIC =1.0 N. mm -1 123.70 4.9% G IIC =0.8 N. mm -1 110.10 15.3% G IIC =0.9 N. mm -1 101.40 22.0% Hybrid Beam ILSS (MPa) Difference Experimental 128.20 - Numerical G IIC =1.0 N.mm -1 123.68 3.5% G IIC =1.1 N.mm -1 132.94 3.7% G IIC =0.9 N.mm -1 113.49 11.5% G IIC =0.8 N.mm -1 110.14 14.1% Table 4 : Comparison between experimental average results and numerical results Figure 8 : Reference beam. Comparison between numerical and experimental results (specimen #4). Figure 9 : Hybrid beam. Comparison between numerical and experimental results (specimen #2).