84
5 Mechanical characterization on structural element level
Figure 63 Experimental and numerical results for 4P-bending tests with loading plates and 3Pbending tests
However here, the two simulation models yield different results in terms of both, failure
mode and strength. The 3D-continuum model fails prematurely due to local core indentation leading to reduced strength if compared to the experiments. This is particularly
evident for B07-L001. The detailed model on the other hand indicate face sheet failure
and thus predicts the bending strength accurately within less than 10% of the experimental results. In case of the B26 configurations both models indicate core indentation,
while the 3D-continuum model fails earlier. However, in this case both modelling approaches suggest bending strengths within 10% of the experiments, leading to a good
agreement between test and simulation. Regarding the B19-101 configurations, the two
Test scatter
Test average
Continuum core
Detailed core
Face sheet failure
Core shear
Core indentation