Learning Forum

[Francesca_Pistorio]

Hello all,nI hope I am not disturbing you. I am modelling using ANSYS APDL the effect of repeated loading on the accumulation of plastic strains in a simple beam. I am sure that the load I am applying causes a plastic deformation. In addition, I model the material behaviour using the Kinematic hardening option, i.e. KINH option. I apply the load between 0 to the maximum values using multiple load steps. nI expect that, for each cycle, the accumulation of plastic strains increases but it does not happen and my strain remains constant. I can not explain this.nThank you for your help and time.nnKindest,nnFrancesca n

[Ashish Khemka]

nnHow are evaluating the accumulated plastic strain?Regards,nAshish Khemkan

[Francesca_Pistorio]

nI simply analyze the stress, strain and deflection values of the specimen, which remain constant during the loading-unloading-reloading process. I would know if there is a way to model the growth of plastic zone increasing the number of cycles. My specimen is only subjected to tensile loading-unloading. nThank you for your time.nnRegards,nFrancescan

[Ashish Khemka]

Hi Francesca,nnPlease evaluate - nlepeq. This will give you cumulative plastic strain. Also, please see the following post which may be useful to you:nnHi Francesca,nnPlease evaluate - nlepeq. This will give you cumulative plastic strain. Also, please see the following post which may be useful to you:nnnRegards,nAshish Khemkan

[Francesca_Pistorio]

Dear nthank you for your suggestions. I've tried to save the accumulated plastic strain but, as in the post you have sent, it remains constant increasing the number of cycles. In your opinion, would it be correct to apply at the end of the unloading phase, i.e. the load is equal to zero, the residual plastic strain? My objective is modelling the growth of the plastic zone in the specimen subjected to the loading-unloading -reloading cycles.nThank you for your help.nRegards,nFrancescan