Issue 61

Y. Hadidane et alii, Frattura ed Integrità Strutturale, 61 (2022) 69-88; DOI: 10.3221/IGF-ESIS.61.05

(a) (b) Figure 3: Different effective widths of each wall constituting the gross section, the effective section with black color for (a) delta section and (b) bi-delta section.

The experimental moment capacities and were calculated using equation (12) as follows [16]:

 4 Pu L

sd M =   u p a

(13)

a: the distance between the support and the applied load. L: the span of the beam.

The determination of the deflection at mid-span of isostatic beams subjected to four-point bending (two point loads, is based on a classical method valid for small displacements in the elastic region, where it has been possible to write a relation between the total load and maximum displacement [17]:



  2 3

48 y E I aL a

P=

(14)



3

However, justifications on the state of deformation-stress will be necessary for each use of these cold-formed products, by experiments, since their mechanical characteristics can vary according to the shape and the number of folds.

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