Hi researchers
Im trying to model dense sand which has peak friction angle and constant volume friction angle . As you k now if we plot shear stress - shear displacement(strain) of dense sand till reaching specific displacement curve ascends to the peak point(peak friction angle)and after that with slight reduction becomes constant(constant volume or residual friction angle). I wanna model the behaviour of soil accurately so my purpose is to define friction angle as a function of shear displacement. I searched and understood using SUBROUTINE (specially USDFLD) may help me but I have not work with subroutines at all and this is my first time however I linked vs code and intel R with abaqus and its completely ready for working.
I will be thankful to hear your helps and advises.
why you not to try to use another way , like simulate the plastic behavior of the soil which will take into consideration the shear effect , friction angle by using Mohr–Coulomb theory.
so by using this constitutive model you represent the shear force inside the soil accurately.
U can defined the friction angle as a function of field variable in abaqus cae. At the same, u can obtain the shear strain and establish the relationship between the friction angle and field variable in USDFLD subroutine. Hence, the friction angle can vary with the shear strain.
Xuejian Chen
Thank you so much dear chen, could you please guide me more about fist way( using field variable in abaqus) or suggest me any video or article related to this title?
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