Questions tagged [abaqus]
The abaqus tag has no usage guidance.
72
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FEA Model Explicit Dynamic System
I have been modeling in both Abaqus and Ansys the effect of an explicit dynamic system in which pressure is applied instantaneously to one side of a piston starting at 1e+16 Pa and finishing at 0 Pa, ...
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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 ...
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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 ...
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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.
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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 ...
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Interaction property is not available in an ABAQUS/Explicit Analysis. The input file was not generated, and the job was not submitted for analysis?
I have created Surface to Node contact interaction, thereafter I am getting the above error when I am submitting the file for the job.
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39
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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 ...
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22
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Wanting to solve an abaqus step many times with different material properties
I'm going to ask this question, and I am not even sure that what I have in my head is possible.
I have a model with 5 part instances. To understand the effect of material parameter values on part ...
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72
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How to calculate Strain Energy Density from Abaqus hyperelastic simulation?
I am modeling a deformation of a rubber material using Abaqus/Explicit using Ogden hyperelastic model. I can visualize Stress (S) and Displacements (U), but I am interested in plotting the strain ...
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How can I create a constant temperatur-Load in Abaqus?
Im working of a model of a clamped steel hollow section column, which is stressed by a local fire. I would like to map the case of fire by area with a constant temperature. For this I have set the ...
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Abaqus error: Too many attempts for hyper-elastic pneumatic inflation simulation
I encounter the too many attempt error in my hyperelastic silicone rubber soft actuator inflation simulation. This is the original structure:
This is the air pressure load and Boundary constraint ...
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42
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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 ...
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64
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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 ...
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149
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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 ...
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368
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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?
...
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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 ...
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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.
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52
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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 ...
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53
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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 ...
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65
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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, ...
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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:
...
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312
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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 ...
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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'...
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502
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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 ...
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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 ...
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169
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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 (...
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115
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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 ...
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121
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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 ...
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807
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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 ...
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542
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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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91
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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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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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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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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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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 ...
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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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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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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 ...
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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 ...
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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 ...
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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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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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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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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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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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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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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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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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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 ...
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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 ...
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