Dear All,
I have posted a question about rotation of a local coordinate system but I did not get any reply. Today I thought to make the problem clearer and post it again. Hope this time I can get some replies.
In the attached picture I want to make the rigid cylinder rotate about the Z axis...
Dear All,
I have put a local coordinate system (Datum csys) at the reference point of a rigid roll and then tried to rotate the local coordinate with the rotation of roll. But it seems that the local coordinate does not change its direction with the rotation of the roll and it always keeps its...
Hi All,
In one of my simulations I need to move a rigid body along a pre-defined path in Abaqus. The path is 2D but it is not simple and it is a polyline and I cannot define amplitude for the X-Y directions in the boundary condition when I want to move the rigid body. I have the path from...
Hi Everyone,
I did a tensile test for the material. The material shows some aging effect close to the yield. I am not sure how can I implement the plastic part in the Abaqus. If I use the offset approach to find the yield stress, then what should I do for the aging effect in the plastic part...
Hi All,
I want to simulate a skin-passing process of a strip in 2D environment (the photo is attached). The dimensions of the strip are 1000, 2, and 70 mm in direction X, Y, and Z respectively. My question is for this 2D analysis should I consider plane-stress elements or plane-strain? I am in...
Hi all,
I want to run a simulation in which material has initial stresses which vary through the thickness. The model has one shell element through thickness with arbitrary number of integration points. How can I implement the initial stresses to different integration point of material? Which...
Hi all,
I want to read data of a local coordinate in the subroutine. If I write “y = coord(2)” the software will always read the coordinate in global system and put that in y, but I have some local coordinate systems in my ABAQUS model. How can I say to the software to read position data in...
Hi All,
I am doing some bending tests. In finite element simulation of bend test, when I use very fine mesh to get accurate results, there is a lot of noise in reaction force. Does anyone know what is the reason of noise in reaction force and how can I omit that? I am recording the reaction...
Hi All,
I want to move a rigid body up (for instance 70 mm) and then move that down -70 mm to come back to initial position. I created a simple model and put two steps for that (the model is attached). As you can see, when you put -70 mm in second step, it will not move -70 mm from this...
Hi everyone,
Would you please answer my Three questions as below?
•I am using ABAQUS in some simulations, I just want to change the boundary conditions in these analyses and compare the results. How can I use a procedure in ABAQUS so that I don’t have to select the nodes to plot X-Y data in...
Hi everyone,
I want to write a subroutine in FORTRAN to define a new element type. For the first step, I want to write a subroutine to define a simple 8-node brick element. Does anyone have a FORTRAN code for solid element so that I can get some idea about how to write a FORTRAN subroutine for...
Hi,
Does anyone know how can I understand if a *.dwg drawing file is created in AutoCAD or not? I have a *.dwg file and I want to know whether the person who has drawn that file used AutoCAD (not other spftware programs like SolidWorks). By checking the time of drawing in AutoCAD we can know...
Hi,
I am not sure how can I find the total CPU time in an analysis in ABAQUS. In job>monitor I saw total time/freq, step time/LPF and time/LFP inc. does anyone know how can I see the total CPU time in ABAQUS?
C,
A
Hi,
To use "model change" in Version 6.10.1 of ABAQUS we can go to bellow in the software:
Create Interaction/model change
But I couldn’t find that in version 6.9.1 of ABAQUS (model change is not in interaction). Does anyone know how can I use model change in version 6.9.1 of ABAQUS? I want...
Does anyone know how to use keywords in ABAQUS? I want to use *Model change keyword for the below problem. But I do not know how to use that.
I want to do an analysis in which I have two steps. The question is I want to know how it is possible to consider some special elements in one step. I...
Hi,
I want to do an analysis in which I have two steps. The question is I want to know how it is possible to consider some special elements in one step. I have attached a simple model regarded to this question.
In the file attached, I considered a sheet in which a 30N force is applied in Y...
Hi,
Does anyone know how can I plot the equivalent plastic strain (PEEQ) versus the Young’s Modulus in a plane stress problem? I can get PEEQ in post processing, but I do not know how to measure E. in the analysis E is not constant and is dependent to PEEQ.
Cheers,
A
Hi,
Does anyone know how to define a material in ABAQUS in which the Young’s modulus (E) is not fix and is dependent on plastic strain?
For instance we want to have the relation between E and plastic strain as follow:
Effective strain (for uniaxial tension, RD) Elastic modulus (GPa)
0.00000...
Hi,
It is the first time that I want to use a UMAT subroutine in Abaqus. I have a Umat subroutine which is written by FORTRAN (*.f). To use the subroutine I have chosen user define in material and I wish to select the subroutine file when I wanted to define the job. But I could not select this...
Hi,
I want to run an explicit skin pass roll forming analysis. As you can see in the attached file, the sheet passes through two rigid rolls and the thickness slightly decreases. I have checked the model and everything is correct. But when you run the model, it continues till time 4.01 and...
