Issue 71

P. Lehner et alii, Fracture and Structural Integrity, 71 (2025) 151-163; DOI: 10.3221/IGF-ESIS.71.11

Second load scheme: three-point bending test in Z direction The second set of results is again represented by a force-displacement diagram (see Fig. 8). These are the results from the three-point bending model with loading in the Z-axis direction. As mentioned above, the resulting force has been multiplied by two to match the real static diagram. This will make it possible to compare the results with the test in the future. Again, the limits for each material are shown. Geometric Variant 02 shows a different resistance distribution than Variant 01. The wooden part of variant 02 has small resistivity, but PC blend and steel have a higher performance. Figs. 9 to 11 shows the visualization of the individual limit values of the separate components (by material).

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limit of plastic strain for PC blend

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limit for steel - yield stress

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limit of plastic strain for PC blend

limit of shear stress for wood

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Force [kN]

limit for steel - yield stress

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Variant 01

limit of shear stress for wood

Variant 02

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Displacement [mm]

Figure 8: Force-displacement diagram for second load scheme (three-point bending test in Z direction) for variants 01 and 02 with critical points for each material.

Figure 9: Visualization of results for limit milestones in second load scheme (three-point bending test in Z direction): shear stress of timber variant No. 01.

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