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Two UMATS in one Subroutine

Submitted by ABAqirl on

Dear All,

I have the problem. i created very simple example with two elements. To one element i prescribed the behaviour Mat1, to another element Mat2. I tried to use two different UMATS for this two elements.

I created Subroutine Myname.f, in which i use CMNAME if (CNMAME.EQ.'MAT1) THEN

CALl UMAT_1()

ELSE IF (CMNAME.EQ.'MAT2) THEN

CALL UMAT_2()

END IF

Then i put two UMATS in the same SUBROUTINES ,

But as a result the program gives MISTAKE , it says that The UMAT doesn't exist

What is the mistake?

ADAPTIVE MESHING in ABAQUS Standard, specialists, please help

Submitted by ABAqirl on

Hello everybody,

Specialist please answer. I make simulations of nanoindentation. I do it in ABAQUS Standard 6.7.1, till 20 nm it is OK. But as i increase the penetration depth, the simulation stops and the information that the element under the indenter is highly distorted. Do you know what is the reason. Does it mean that adaptive meshing doesn't work? Or some other problem.

 

Best regards

 

ABAgirl

Force is droped during indentation simulation at the step of indenter withdrawal

Submitted by ABAqirl on

Dear All,

I have the following problem. I simulate an indentation in two steps. At first step the indenter penetrate to the material. At the second step it withdraws from it. The problem, at the second step force simply drops, although the behaviour of material is elasto-plastic.. What could be the reason? Incorrect boundary conditions, very soft behaviour of material??? Specialists, please help.

 

Best regards

ABAgirl


Indentation simulation, Contact problem, ABAQUS CAE specialists , please help

Submitted by ABAqirl on

Dear All,

I have the following problem. I simulate an indentation in two steps. At first step the indenter penetrate to the material. At the second step it withdraws from it. The problem, at the second step force simply drops. What could be the reason? Incorrect boundary conditions, very soft behaviour of material??? Specialists, please help.

 

Best regards

ABAgirl

REFERENCE POINT of analytical rigid surface, specialist in ABAQUS CAE Explicit contact, please help

Submitted by ABAqirl on

Hello everybody,

I simulate the indentation test with ABAQUS CAE, the indenter is simulated as rigid body analytical surface. I also created reference point, but when i submit the job, there is a mistake:

 

The rigid part instance Part-2-1 is missing a reference point. Either assign a reference point to the corresponding part or include the entire part in a rigid body constraint.

I think i have done everything properly but it doesn't work. if you need i can send you my code.

I am looking forward to your answer.

 

Contact problem

Submitted by ABAqirl on

Hello everybody,

I am simulating contact problem . Two sutfaces are in contact. One of them is anamytial surface. My slave surface doesn't deforms properly, master surface goes through my slave surface. Please help me with advice, which properties should i put for interaction?  What should be the reason of such mistake.

 

Best regards

ABAgirl 

ABAQUS CAE specialist please help

Submitted by ABAqirl on

Hello every,

I am trying to create the model in ABAQUS CAE with cohesive elements. I try a simple 2D case.I did the following

1. i create two parts a) rectagular part

                              b) a line whick suppose to be cohesie elements later

2. I create two materials , elastic and cohesive

 Then i create to sections Solid section and cohesive section