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Arie Koot

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Just a general question: Why you want to use sanisand umat?

On An error in the SANISAND umat runtime

geostep is not correct: only soil stresses are calculated: state var are zero (included void) for geostep you need umat…

On An error in the SANISAND umat runtime

use dynamic implicit instead of static general for displacement take 1 step after gravity. time for example 100sec and minimal…

On An error in the SANISAND umat runtime

There is tension in the soil: because c=0 it is not possible. DT_k is reduced to DTmin and DTMin is…

On An error in the SANISAND umat runtime

It do not know which units you have used, but if the displacement is in meters the displacement is large…

On An error in the SANISAND umat runtime

substepsize is too low < 1e-18 problem cannot been solved. perhaps model is wrong

On An error in the SANISAND umat runtime

QT=(T1-T2)*A*ktemp/L*dt [J] ΔT=Q/VRCtemp Qw= ΔhxAxkw/L*dt = (P1-P2)/9810xAxkw/L*dt [m3] kw=m/s ΔP=Qw/VxEwbulk => ktemp=conductility=Kw/9810 => Ctemp=specified heat= 1/Ewbulk/R

On Htypoplastic Model in Miidas GTS NX

I do not know Midas but according next link the umats from soilmodels are not compatible http://manual.midasuser.com/en_common/GTS%20NX/150/GTS_NX/Appendix/USSR.htm

On Htypoplastic Model in Miidas GTS NX

"POR" is not a fieldoutput of Sanisand-UMAT. Material model input=strain Material model output=stress stresses => forces => acceleration (a=F/M) =>…

On set cavitation limit in ABAQUS/STANDARD when using SANISAND umat

correct: if volume doesnot change, pore pressure will not change. Due to shear strain and dilation/compaction props the effective isoptropic…

On set cavitation limit in ABAQUS/STANDARD when using SANISAND umat

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