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Questions tagged [abaqus]

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15 views

how did Abaqus integrate the predefined field (stress) into the FEA formulation

The formulation based on the dynamic virtual work equation is Several boundary conditions can be applied. One of them which Abaqus provided is predefined field (stress). It gives the stress tensor ...
0
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4answers
45 views

Physical meaning of increment in static problem in abaqus

When we use Abaqus to solve the static problem, one step is to set: Time period, the number of increments and increments size. But since the static problem is not time-dependent, there is no time, ...
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0answers
13 views

Find amount of sliding between 2 surfaces

in my project I am required to find how much two surfaces slide against each other (to see how much it'll will rub against skin). Does anyone know how I can find these results? Thanks
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0answers
9 views

How to obtain the radial strength of a stent model in ABAQUS

I am simulating the crimping of a stent in ABAQUS/Standard using a 3D deformable cylinder on which I impose a displacement in order to crimp the stent from an initial diameter of 2.5 mm to a final 1 ...
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0answers
29 views

How to define hysteretic damping coefficients for both longitudinal and shear waves in Abaqus?

I am modelling the elastic wave propagating in the damped materials using the hysteretic damping model, but the longitudinal and shear waves usually have different damping characteristics. How ...
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0answers
20 views

Must I use viscoplastic model to fit the thermoplastic material

I need to do the simulation with a specified material. It is known as a thermoplastic. During the simulation, I need to define the material property. I need to choose whether it is viscoplastic or ...
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0answers
8 views

How to run a steady state dynamics, Modal step based optimisation using TOSCA?

What design responses must be given in the TOSCA gui. I chose volume reduction as an objective function with the constraints of displacement. Is this approach correct?
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1answer
34 views

How to perform 3 point bending test by using force instead of displacement in ABAQUS?

I know you can apply displacement to a rigid body (cylindrical rod) to perform a 3 point bending test in ABAQUS. Is it possible to apply force to the rod (e.g. rod with super high young's modulus so ...
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0answers
59 views

How can I do engineering projects for money at home? [closed]

I am a M.Sc. graduate in mechanical engineering and I have experience with engineering software, like MATLAB, CATIA, and ABAQUS. I want to know how I can find industrial projects like finite element ...
2
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1answer
48 views

Abaqus Failure for I-Beam Section in Major direction only

For my 4th year dissertation in Civil Engineering I've got to investigate the difference between BS5950, Eurocode 3 and ABAQUS failures. The only thing is, in the BS5950 and Eurocode 3 the failure can ...
1
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1answer
184 views

Meshing Complex models in abaqus

I'm trying to mesh a model of a morphing wing in Abaqus and have been running into issues. It was recommended that I partition the model into smaller parts, but it seems that the more I try to ...
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2answers
325 views

Is there any reason for Abaqus to give this error message “Illegal memory reference (signal11)” whenever the number of statev is greater than 15?

I work with Abaqus CAE/Standard a lot! Whenever I have tried to put the number below the *Depvar keyword to be greater than 15 (and there can be any subroutines (UMAT or USDFLD) with no coding in it, ...
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0answers
60 views

Modeling Rotation and Translation of surface B.C. in Abaqus

I am trying to model a test which has grips that can translate in X and Y directions, as well as rotate. I have been trying to model this using constraints and a reference point but have not been able ...
2
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0answers
47 views

How to join two beams rigidly?

Hi I am making a beam model using Abaqus. There are two beams created. I wanted to join two beams rigidly in the connection to transfer moments between beams. However, I do not know what connector or ...
1
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1answer
49 views

Is it true that if the structure damaged or corroded, the stress will be lower?

I am comparing the stress results between original or non-corroded model to corroded model. I found that the stress value in non corroded model is lot more bigger than the corroded model, is it ...
1
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1answer
46 views

How to calculate residual strength of a corroded structure from their stress values?

Currently, I have an actual entire corroded bridge model in the FEM analysis in Abaqus I want to estimate the residual strength of this bridge due to corrosion from the output results in the Abaqus, I ...
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3answers
55 views

What is the good reason if the curves between two results are not similar?

According to my results, I can have this curves. And somehow in this figure, it is not pretty much similar, What can I say if it is asked why I still want to use the FEM results? Or how can I ...
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0answers
57 views

Bad triangular-shell elements in Abaqus?

Abaqus 6.14 I have a 2D shell mesh reconstructed from a *.ply file. When I verify the mesh I get 55% bad elements (CPS3). So I get a list of all the bad elements & reconstruct the mesh again ...
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1answer
176 views

Spatially dependent material property in Abaqus/CAE

I am modelling a plate as 3D deformable solid. My plate has a spatially dependent isotropic thermal expansion coefficient. I have defined this spatial distribution as a Discrete Field in a tabular ...
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0answers
35 views

Abaqus Import Analysis

I want to import initial state of a model using predefined fields in import analysis and change the general stiffness matrix and continue simulation. But by default model get the section(material) ...
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2answers
120 views

Does anyone know how would one use “mutexes” in fortran user subroutine so that I can run abaqus job via parallel processing?

I really would like to run my abaqus jobs (that have user subroutines attached to them) very quickly. I have read some sections in documentation about calling a utility subroutine called "MutexInit". ...
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0answers
183 views

If I want to run an abaqus job (in Linux redhat) with user subroutine on parallel processors, how do I do that?

I work in Abaqus 2017 a lot. I have noticed that when I submit any abaqus job (that does not contain any subroutine!) via parallel processing (aka cpus=4 or 8), it runs just fine! But, when i submit ...
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0answers
351 views

How does Abaqus calculate reaction force?

I wrote a UEL for one element and compared to a reference UEL (FEM), where the results agreed satisfactorily, except the reaction force. The stress, strain, strain energy all were pretty accurate. I ...
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0answers
17 views

How does one activate viscosity change, in gap flow, as the dependency (field variable) is specified at a particular node in Abaqus Standard?

I have a question regarding fluid flow and the change in viscosity of the fluid flow as the field parameter changes from one step to another. I am modelling fluid flow, followed by fluid and ...
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1answer
95 views

in keyword *SURFACE, file “FSECase1cor.inp”, line 79025: Unknown assembly element set_M_SURF-1016_E3 (What does this error mean?)

I submitted the edited inp. file in abaqus. I edited the thickness of shell elements then after I run the edited inp. file, I am suffering from this error. Actually, there is another error: "There ...
0
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1answer
229 views

How to resolve this error message 'Unknown keyword 'section:steel1'. The keyword may be misspelled, obsolete, or invalid'

I am currently having an error message 'Unknown keyword 'section:steel1'. The keyword may be misspelled, obsolete, or invalid' error message: Unknown keyword 'section:steel8e3'. The keyword may be ...
3
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1answer
808 views

ABAQUS Analysis: Difference between assigning Section as Plane stress/strain vs. Element type?

In ABAQUS, there are multiple ways to specif your part is in plane stress/strain. 1. When assigning the section, one can specify that it is a generalized plane strain section. 2. When assigning the ...
0
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1answer
221 views

Cyclic loading on ABAQUS CAE

I am new to abaqus and for my final year project I'm meant to simulate a force on a cylinder (testing displacement of articular cartilage) ranging from 1-15 Hz and between 15-36 Newtons but I don'...
0
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1answer
52 views

How to know which constraints suffer from 'nodes are used more than once as slave node' in abaqus?

I have been struggling to find which node and constraint suffering from 'nodes are used more than once as a slave node' in abaqus error message. Please help me resolve this problem Thank you
2
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0answers
224 views

How to convert solid part to shell part in Abaqus?

I want to compare the same model with solid shape and shell shape, since my model is big, I am wondering if there is a way to convert the solid part into a shell in Abaqus easily without creating a ...
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0answers
28 views

Abaqus Milling Simulation

I'm creating a simulation in abaqus of a endmill removing material from and aluminium plate. The simulation is almost working, but only the surface level element are being removed from the plate. The ...
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0answers
44 views

Entering frequency dependent elastomer properties in abaqus

I am trying to enter frequency dependent viscoelastic properties for an elastomer into abaqus. I found where to enter the properties: Edit Material->Mechanical->Elasticity->Viscoelastic Domain: ...
0
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1answer
283 views

How to query stress and strain values in a specific element in Abaqus?

I am trying to find easier way to get stress and strain values in a specific element in Abaqus. Does anyone know how to do it? Is it possible to do with Query? Thanks
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0answers
18 views

How to find all the parameters in weight vector in Levenberg-Marquardt Algorithm?

I already had a data for corroded thickness distribution (in matrix form) for corroded surface model in Abaqus with mesh size 5 cm I want to create thickness distribution with bigger mesh size (e.g 50 ...
0
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1answer
179 views

How to get all forces and displacements values in abaqus and export it to excel?

I have made bridge model in Abaqus, I also have done experimental study and I have the load-displacement data from my experiment, I am now going to compare the results from Abaqus and the results ...
0
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1answer
22 views

is there any other ways to refine mesh size in particular place without making a partition?

I am currently making a corroded model in Abaqus, but not all locations are suffering from corrosion. As shown in the picture there are some parts (the blue parts) that do suffer from corrosion, so ...
0
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1answer
145 views

How to obtain strain and stress values by editing abaqus input file?

I am currently working on abaqus modeling, I am trying to find a quick way to get the strain and stress values shown in the output file. What do I need to put in the .inp file? Does anyone know how ...
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2answers
1k views

How to Solve this error message on Abaqus 'time increment required is less than specified' and 'too many attempts made for this increment'?

I am currently working on my dissertation project using abaqus, my model is an arch bridge consisting of a shell and solid elements, there are concrete and steel materials also, I have checked all of ...
2
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2answers
113 views

How the amount of bolt's preload in a single lap joint can change the natural frequencies?

Few days ago someone told me that the amount of bolt's preload in a single lap joint can influence the natural frequency of the beam. So to test that out I modeled a 3D single lap joint in ABAQUS and ...
0
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1answer
201 views

How to derive deformation gradient or displacement gradient?

In one of my project, I need deformation gradient or displacement gradient for some elements in my model that made by ABAQUS software and I can't find it directly, any suggestion or help would be ...
1
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1answer
40 views

Mechanical Engineering- Modeling contact in Abaqus

I have simulated a 2D model in Abaqus which indicates 2 main part, first a sector that represent as wheel and, second a rectangular that represent rail. the wheel and rail are in contact and wheel ...
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2answers
898 views

How to decide initial size increment in Abaqus Dynamic Implicit?

I am using Dynamic Implicit to model a rolling problem. But I am not really sure what to choose as Initial increment. The default suggestion by Abaqus is the step time.
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0answers
612 views

Creating a custom field output in ABAQUS

I want to create a custom field output in ABAQUS. For the purpose of proof on concept, I want to display the maximum shear stress as calculated from the Mohrs circle, as discussed here for a 2D shell. ...
3
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1answer
729 views

What are exact location of Integration Points in STRI3 element in ABAQUS?

Introduction I have a file with .rpt extension from ABAQUS which is output of a model. This .rpt contains stresses of elements and displacements of nodes in plane text format. There is an item with ...
2
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1answer
107 views

FRF based material constant optimization

I need advice on how to optimize a finite element model of a transversely isotropic material. I have modeled the material with 5 nominal moduli in Abaqus and performed an eigenvalue extraction. ...
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2answers
2k views

How to Plot Stress Contours in Abaqus?

1) Under Visualization in Abaqus, contours for displacements-U1 and U2 are available. How could I generate contours for displacements in x-y direction, that is Ux and Uy? Similarly how can I get ...
3
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2answers
13k views

What is the difference between implicit and explicit analysis in ABAQUS?

How can I choose between Implicit or Explicit Analysis in ABAQUS for a simple rectangular composite structure with 2 layers of unidirectional lamina? I am trying to do a linear-static analysis to ...
5
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1answer
137 views

How do I model a longitudinal tensile strain in a laminate composite using Abaqus software? [closed]

I want to be able to measure the strain response in a material composed of 2 lamina, bottom one (0) top one half (0) half (90), and see the differences in the unidirectional versus the bidirectional ...