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How quadrilateral elements represented in most FEA solvers for structural mechanics problems?

How quadrilateral elements represented in most FEA solvers for structural mechanics problems? I know that Nastran-95 represent quadrilaterals for membrane and bending elements as a set of triangles: ...
Евгений Павлов's user avatar
2 votes
0 answers
204 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 ...
HSChan's user avatar
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2 votes
0 answers
814 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 ...
Schneider's user avatar
2 votes
0 answers
75 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 ...
Phil Young's user avatar
1 vote
2 answers
66 views

Is there a specific way to simulate porous structures?

I tried to simulate an axial compression test for a lattice (porous) structure but It takes too much time and it doesn't give me the right answer (when I compare with experimental results). So, I was ...
Goli's user avatar
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1 vote
0 answers
50 views

Abaqus vcct fatigue consistently underpredicts disbond growth rate

I'm modelling a fatigue disbond using abaqus. I've understood the disbond growth rate is equal to: $$\dfrac{\partial a}{\partial N} = c_3 \Delta G^{c_4}$$ I've set up an analysis with MMB specimen. I'...
Nathan's user avatar
  • 69
1 vote
0 answers
566 views

Abaqus XFEM crack propagation

I'm trying to run a simulation about crack progation using XFEM. In particular, I have a 2D case where I'm representing a composite material composed of matrix plus a single fiber. I would like to ...
federico's user avatar
1 vote
0 answers
73 views

How do I define properties orientation in a 2D short random fibers composite? ABAQUS

I generated different 2D microstructures with different fibers volumetric fraction (basically a square representing the matrix and a lot of small rectangles inside, with different measures and random ...
Federico De Bianchi's user avatar
1 vote
1 answer
225 views

How to repeat on ABAQUS FEM simulations without reloading the mesh?

I would like to perform several FEM simulations on a given mesh with ABAQUS, where only the orientation of an element set would change in between. Currently, I'm just generating several inp files (...
Rémy Martin's user avatar
1 vote
0 answers
170 views

Extracting load info on Abaqus with Python

I have a model on Abaqus that I've managed to run some 85 jobs on manually. Between jobs, only the loads vary, and I select these loads by resuming what I need and suppressing what I don't with my ...
jv7's user avatar
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1 vote
0 answers
29 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?
Kartik Kanugo's user avatar
1 vote
1 answer
957 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 ...
Tanner's user avatar
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1 vote
0 answers
214 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 ...
user17189's user avatar
1 vote
0 answers
88 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) ...
Chamith Deeman's user avatar
1 vote
0 answers
490 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 ...
MousumiG's user avatar
1 vote
0 answers
37 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 ...
MousumiG's user avatar
1 vote
0 answers
648 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 ...
Cindy.Karina9's user avatar
1 vote
0 answers
148 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: ...
Cory Smith's user avatar
1 vote
0 answers
57 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 ...
Cindy.Karina9's user avatar
1 vote
0 answers
2k 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. ...
User2341's user avatar
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0 answers
14 views

Modifying Johnson Cook Model in ABAQUS simulations

I am currently simulating a high strain rate impact of commercially pure nickel and found a constitutive equation in DOI: 10.1051/jp4:2006134015. They have a modification of the Johnson Cook model to ...
Thian Daniel Iskandar's user avatar
0 votes
0 answers
14 views

Is it possible to use the results from Abaqus Standard as a predefined field in Explicit analysis? If so, how is the time mapped between the analysis?

I have nodal results from an Abaqus UEL subroutine, where I am solving coupled heat and moisture transport. I have three degrees of freedom in this analysis and several more state variables. I want to ...
Gino Varkey's user avatar
0 votes
2 answers
268 views

What is the difference between maximum principal strain and maximum in-plane principal strain?

For the purpose of answering/explaining this, it does not need to be restricted to strains (i.e., it can be stresses too). I am mainly trying to understand when to use which one (i.e., if I am ...
SNIreaPER's user avatar
0 votes
0 answers
4 views

Why cannot I use the 'view cut' function in Abaqus when I change the 'Countour Intervals'?

I'm doing a mechanical analysis with abaqus.I need to print the sectional stress diagram of the workpiece. In the beginning,I chose the 'Continuous' in 'Countour Intervals' and use the 'view cut' ...
jiajie hu's user avatar
0 votes
0 answers
20 views

Specific Heat, Pore Fluid In ABAQUS

I want to model a problem that the theory behind is in the "Coupled Pore Fluid Flow and Stress Analysis" context that there is in the ABAQUS online documentation, version 2022. The link to ...
Sign Up Log In's user avatar
0 votes
0 answers
25 views

Simulating the Impact of Bicycling on Hip Joint Cartilage

Sorry if this question comes off as obvious. I have more of a biology/clinical research background, and I have almost 0 experience with FEA. I have 50 sequential data points of the hip joint angles of ...
Omnitragedy's user avatar
0 votes
0 answers
35 views

Clarification on the location of stress and strain output value in Abaqus

Today, I had a discussion with my teacher about the location of stress and strain output in Abaqus. I believe that Abaqus outputs stress and strain based on Gauss integration points. However, my ...
yuxuan's user avatar
  • 149
0 votes
0 answers
12 views

How can I input the equation below in Abaqus (Operate on XY Data) with certain condition? Where fi=5+5i and frequency range is between 300-950; S=189

Where fi=5+5i and frequency range is between 300-950; S=189.
李晓兰's user avatar
0 votes
0 answers
43 views

Mode shape directionality in Abaqus finite element analysis

For a coupled aero-structural analysis I'm working on, I have to extract the eigenvectors/mode shapes of my structure, so that I can run aerodynamic calculations on them. I have a parameter (in this ...
dboston's user avatar
0 votes
1 answer
84 views

Converting data from Chaboche material model from ABAQUS to ANSYS

How to minimize differences when using Chaboche model in ABAQUS and in ANSYS. For example as I've noticed – in ABAQUS one has rate-dependent plasticity model, but in ANSYS it is rate independent ...
Rejnold's user avatar
0 votes
0 answers
59 views

Plate theory vs FEA

I’ve modelled a plate in Abaqus FEA, and I also calculated the Stress and deflection by hand using plate theory- Why is it that plate theory and simulation deflection and Bon Mises stress values vary ...
Henry's user avatar
  • 1
0 votes
0 answers
126 views

ABAQUS STRI3 Element, local coordination system

As you know ABAQUS have a triangle plate bending element named STRI3. After analysis (post-process) when user generate report for internal stress of those STRI3 elements, abaqus give the Cauchy stress ...
epsi1on's user avatar
  • 228
0 votes
1 answer
283 views

In FEM, what is the difference between a single element with a quadratic shape function and two elements with linear shape functions?

Using Finite Element Analysis to obtain a Weak form of a PDE, what is the difference between the two cases: A single element with a quadratic shape function Two elements with linear shape functions. ...
Eggart's user avatar
  • 1
0 votes
0 answers
71 views

Why the model with rebar layer shows one sided plastic strain in Abaqus?

Using the damaged plasticity model, I modeled a concrete coupled shear wall in Abaqus, once with discrete rebar and once with rebar layers for the slab. I used the general static solver to run the ...
Mohammad Mehdi Ebadi's user avatar
0 votes
0 answers
420 views

ABAQUS: How to connect a shell edge with a shell face?

I'm performing a buckling analysis of a stiffened aluminium panel. The panel and flatbar stiffener(2) is created as one 3D shell extrusion. The T-stiffener (1) is another 3D shell extrusion. How do I ...
Jonas's user avatar
  • 1
0 votes
0 answers
148 views

Fatigue modelling in Abaqus

My problem: I'm trying to model fatigue disbond growth in Abaqus. So far I've tried this using multiple approaches with mixed results. What I've tried: I first started with modelling a static general ...
Nathan's user avatar
  • 69
0 votes
0 answers
1k views

How to get version from an abaqus output database file?

I want to read some data from an .odb file, but when I open it using the C++ API I always get this error message: file.odb is from a more recent release of Abaqus. The current Abaqus installation ...
Jonas Pucher's user avatar
0 votes
0 answers
23 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 ...
yuxuan's user avatar
  • 149
0 votes
1 answer
859 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
Cindy.Karina9's user avatar
0 votes
2 answers
96 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
Stefan Younghusband's user avatar
0 votes
2 answers
856 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". ...
MousumiG's user avatar
-1 votes
1 answer
1k 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 ...
Cindy.Karina9's user avatar