Questions tagged [abaqus]

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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
0 votes
1 answer
822 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
0 votes
0 answers
10 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 ...
0 votes
1 answer
68 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 ...
1 vote
1 answer
939 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 ...
0 votes
1 answer
268 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. ...
0 votes
2 answers
817 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". ...
1 vote
2 answers
64 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 ...
0 votes
2 answers
132 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 ...
1 vote
1 answer
213 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 (...
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' ...
0 votes
0 answers
16 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 ...
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 ...
0 votes
0 answers
31 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 ...
0 votes
0 answers
11 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.
0 votes
0 answers
37 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 ...
0 votes
1 answer
214 views

Is it possible to convert a structure with a .stl file to a solid structure in Abaqus?

I have a .stl file of a structure and I want to use this file to do a simulation in Abaqus. I need my part to be solid but I don't have any .stp or .iges file of the sructure. So, I imported my .stl ...
0 votes
0 answers
55 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 ...
3 votes
3 answers
24k 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 ...
0 votes
2 answers
528 views

Plasticity (stress(strain)) interpolation in Abaqus

The stress-strain data for a plastic deformation is given in table.   I have two questions related to how that table is treated: How is data interpolated? Is it piecewise linear or something else? ...
1 vote
0 answers
551 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 ...
0 votes
0 answers
119 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 ...
0 votes
1 answer
63 views

Calculating stress in a member

I have the following question I used abaqus software to create a sketch and added the downwards load on member BC. However the value I get for the stress is 90185.7 Is my answer incorrect because it ...
0 votes
0 answers
69 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 ...
0 votes
1 answer
70 views

Are there any ways to know whether the element has failed under loading, while knowing only limited properties?

I opt to check whether a precast concrete wall (no reinforcements, only concrete) withstand both vertical and lateral loading condition but the only properties I know are the Young's Modulus, density, ...
1 vote
3 answers
8k 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 ...
3 votes
0 answers
52 views

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: ...
0 votes
0 answers
388 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 ...
0 votes
2 answers
364 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 ...
1 vote
0 answers
49 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'...
1 vote
0 answers
72 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 ...
0 votes
0 answers
136 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 ...
-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 ...
1 vote
0 answers
147 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 ...
0 votes
0 answers
957 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 ...
0 votes
4 answers
632 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, ...
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 ...
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?
1 vote
1 answer
81 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 ...
2 votes
2 answers
315 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 votes
2 answers
3k 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, ...
2 votes
1 answer
191 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 ...
1 vote
0 answers
210 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 votes
0 answers
189 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 vote
1 answer
55 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 ...
0 votes
3 answers
68 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 ...
1 vote
1 answer
1k 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 ...
1 vote
0 answers
87 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) ...
0 votes
1 answer
494 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 vote
2 answers
2k 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.