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Hello I want to model a cylindrical steel silo under earthquake excitation. I have modeled bulk material inside silo with drucker-prager model, I have used 8 node solid elements for modeling of materials inside silo and 4 node shell elements for modeling of silo walls and silo bottom. I have...

hello I want to model granular material under cyclic loading and I want to use vumat in abaqus explicit. I have download a umat from www.soilmodels.info and I want to convert it to vumat. can any one help me. because I do not have enough expertise to do this work. I have attached the umat file...

paper filehttp://files.engineering.com/getfile.aspx?folder=78448f9c-6d67-4fce-b9f7-38b1b28fc6c2&file=fulltext1.pdf

Hello I want to model granular material under cyclic loading and I want to use vumat in abaqus explicit. I have download a umat from www.soilmodels.info and I want to convert it to vumat. can any one help me. because I do not have enough expertise to do this work. I have attached the umat file...

because when I use tie constraint I will encounter overconstraint problem due to my model has surface to surface contact and accelaration boundray conditions too

I have an discrete rigid orphan mesh and a deformable body orphan mesh that have coincident nodes I want to merge these nodes without converting these parts to a discrete rigid part what should I do? Please guide me.

now my model have only two parts. I have used drucker prager model instead of umat before for modeling of granular material and these warnings still exist.

I want to model a steel silo under earthquake excitation. I used a umat subroutine for constitutive behavior of granular material (hypoplastic mateial with inergranular strain) I tried to model a steel silo with granular material under earthquake excitation with Abaqus standard. I modeled silo...