consider large deformation for compression only material

[xieyazhou]

Hi All,

I am trying to model the rocking column on rigid base using compression only materials at the rocking interface, I used zero length elements with ElasticPP spring material in the vertical direction. While since it is a large deformation problem, the spring response was not correct. So is there any other element that I can use for the compression only material, while also considers large deformation, e.g. geometrical transformation in beam column elements?

Thanks,
Yazhou

[fmk]

you could try a corotationalTruss

[xieyazhou]

Thanks Frank, I tried the corotation truss element and it works!