Issue 71

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

Third load scheme: three-point bending test in Y direction The third set of results is again represented by a force-displacement diagram (see Fig. 12). These are the results from the three-point bending model with loading in the Y-axis direction. As mentioned above, the resulting force was multiplied by two to match the actual static diagram. This will allow future comparison of the results with the test. Again, the limiting values for each material are given. Reversing the direction of loading did not significantly change the diagrams themselves but did shift the limit values in both directions for the different materials. Variant 02 again shows the highest limit for steel, but the PC blend does not produce better performances here than in variant 01. Figs. 13 to 15 shows a visualization of the individual component limits (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

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limit of shear stress for wood

Force [kN]

limit for steel - yield stress

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Variant 01

limit of shear stress for wood

Variant 02

0

0

2

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Displacement [mm]

Figure 12: Force-displacement diagram for third load scheme (three-point bending test in Y direction) for variants 01 and 02 with critical points for each material.

Figure 13: Visualization of results for limit milestones in the third load scheme (three-point bending test in Y direction): shear stress of timber variant No. 01.

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