Portal de Periódicos da CAPES

Numerical and experimental study of the multi-axial quasi-static strength of clinched connections

2012; Springer Science+Business Media; Volume: 6; Issue: 4 Linguagem: Inglês

10.1007/s12289-012-1097-4

1960-6206

Sam Coppieters, Pascal Lava, Renaat Van Hecke, Steven Cooreman, H. Sol, Paul Van Houtte, Dimitri Debruyne,

Metallurgy and Material Forming

Conventionally, the mechanical strength of clinched connections is determined by a single shear lap test and/or a pull-out test. However, in most practical applications a combination of shear and pull-out is exerted on the clinched joint. This paper deals with the development of an Arcan-like device which enables to introduce various shear/tensile ratios in a clinched assembly. An experimental survey of the multi-axial behaviour of a non-cutting single-stroke round clinched connection of two DC05 sheets, which is mild deep drawing steel, is conducted with this modified Arcan setup. These experimental results are used to check the validity of numerical models that predict the strength under multi-axial loading. Since the forming of a clinch is a fairly complex sheet metal operation, a good knowledge of the plastic material properties and the frictional behaviour is of the utmost importance to perform a sufficiently accurate FEA simulation. The impact of these factors on the multi-axial loading behaviour of the DC05–DC05 connection is investigated.