Stabilizer Fillet Weld Strength under Multiaxial Loading (Effect of Force, Size and Residual Stress)

In this paper, the strength of a stabilizer is determined when the static and fatigue multiaxial loading are applied. Stabilizer is a part of suspension system in the heavy truck for stabilizing the cabin against the vibration of the road which composes of a thin-walled tube joined to a forge component by fillet weld. The component is loaded by non proportional random sequence of torsion and bending. Residual stress of welding process is considered here for static loading. This static loading with road irregularities are applied in this study as fatigue case that can affected in the fillet welded area of this part. The stresses in the welded structure are calculated using FEA. In addition, the fatigue with multi axial loading in the fillet weld is also investigated and the critical zone of the stabilizer is specified and presented by graphs. Residual stresses that have been resulted by the thermal forces are considered in FEA. Force increasing is the element of finding the critical point of the component.

Authors:

• Iman Hadipour
• Javad Marzbanrad

Keywords:

• Fillet weld
• fatigue
• weld toe crack
• weld root crack
• S-N curve
• multiaxial load
• residual stress
• combined force.

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