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Bend-resistant carrier connection with fillet welds

Figure 01 - Bend-resistant carrier connection with fillet welds
Results in DUENQ

Figure 02 - Results in DUENQ

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15 April 2019

002930

Sonja von Bloh

Modeling | Structure

SHAPE-THIN 9

A carrier is welded with fillet welds to a face plate. How can the weld stresses be calculated?

Answer

Figure 1 shows a bending-resistant carrier connection by fillet welds. The carrier profile is an IPE 300, S235. Outboard flange fillet welds (a = 7 mm, l = 150 mm), along the inside of the flanges fillet welds (a = 5 mm, l = 50 mm) as well as web double fillet welds (a = 4.5 mm, l = 239 mm) are used. The connection bending moment is M y = -106.11 kNm.
It is believed that the fillet welds are concentrated in the root lines.

It follows:
A = 2 ∙ 0.7 ∙ 15 + 2 ∙ 0.45 ∙ 23.9 + 4 ∙ 0.5 ∙ 5.0 = 52.51 cm ²
I y = 2 ∙ 0.7 ∙ 15 ∙ 15.0² + 2 ∙ 0.45 ∙ 23.9³ / 12 + 4 ∙ 0.5 ∙ 5.0 ∙ (15 - 1.07) ² = 7690 cm 4

At the end of the web double fillet the following tension results:
σ ⊥ = 10611/7690 ∙ 11.95 = 16.49 kN / cm²

The fillet welds are modeled in DUENQ and entered as the cut size M y = -106.11 kNm. The same values are obtained after the calculation as in the above calculation (see Figure 2).

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Fillet Weld voltage

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