Hello,
Is there any constitutive model for sand which can simulate the number of cycles to reach the critical state. I used the SANISAND model but it is not promising. Any suggestion is highly appreciable.
Thanking you
SAQIB
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Hi SAQUB, you can try ISA cyclic hypoplasticity (Fuentes et al.) which is freely available in the “models” section. It present a mechanism for the simulation of cyclic loading. In my experience, it is accurate until 150-200 cycles.
Regards,
Jose
Thanks for your response. In the paper, it is written there that “The model took over 40 cycles to touch the critical state line (see Figure 7.d) which is evidently far from the experimental result. This is attributed to the hardening rule from the intergranular strain model which needs to be improved”
If you are pointing to any other paper of fuentes. Please send me the link.
Regards
SAQIB
Hi SAQUB, The document that you are reading is about the ISA model in its first version (2015). The one that is implemented as UMAT subroutine in Soilmodels the model in the version of 2019: ISA-Hypoplasticity accounting for cyclic mobility effects for liquefaction analysis (2019) published in Acta Geotechnica. Link: https://link.springer.com/article/10.1007/s11440-019-00846-2
Check Figures 7 and 8 of that paper.
Regards,
Jose