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Questions related to Finite Element Modeling
Anybody knows how to change the density of materiel during a deformation process in a specific strain range, for example (when strain raise from 0.1 to 0.2) using VUMAT ABAQUS subroutine?
Dear,
Please, how to use ABAQUS ''SWELLING'' option with Law as ''Input''. I have inserted a range of values for ''Strain rate'' and corresponding Field variable 1 - see attached screenshot file as pdf.
But when I run the job in ABAQUS it ONLY read the first value of the table (first row - as highlighted in the attached file) and ABAQUS doesn't read any other value for 'Strain rate' and 'Field 1'?
Please, can I use ONLY the tabular data (multiple values of Strain rate and corresponding Field 1) without using the subroutine USDFLD?
Many thanks for your support and time.
Best regards,
Hello everybody
Hope you’re doing great
Assume I have two material properties MATERIAL1 and MATERIAL2. I start my model with MATERIAL1 and calculate each element’s (von misses) stress and if any element’s stress exceeds N MPA I change its material to MATERIAL2 and continue till all the elements’ materials
are altered to MATERIAL2.
For this purpose:
Do you suggest Abaqus scripting by the following method:
1. Run the job
2. Write elements’ stresses to an .odb file
3. Check the elements’ stresses by reading the .odb file and change the desired elements’ material to MATERIAL2
4. Run the next job
5. Continue the above-mentioned loop by a script till all the elements’ materials change to MATERIAL2
Or
Do you suggest running a job and implementing Abaqus subroutines (USFLD etc)?
1. Which method is applicable?
2. What are the cons and pros of each one?
Thanks for your precious points.
Best regards,
Yunus.
PS: Let’s say the real model has 1000 elements or more and 5 different material properties to describe a small gap bone healing process.
Hello everyone
Hope you're doing great.
I'm trying to learn and implement Abaqus subroutines (particularly USFLD) and am struggling with the following Abaqus terms' meanings and applications:
1. field variables
2. material point (and material point quantities)
would please help me out here with the definitions and examples of the above-mentioned terms since I haven't found any useful website links online.
Best regards,
Yunus.
Consider level 3 Fitness For Service of high pressure oil and gas equipment and thinning due to localized corrosion.
I wanted to add a stiffener to the rectangular plate by considering the maximum deflection node to the nearest minimum deflection node.
I can add the stiffener by considering the maximum deflection node (coordinates) to the minimum deflection node (coordinates), but it is not the nearest one.
Could anybody tell me how can I get the nearest minimum deflection nodes???
Odb Abaqus script for maximum and minimum deflection nodes but not nearest
stepframe = odb.steps['Step-1'].frames[-1]
displacement = stepframe.fieldOutputs['U']
field=displacement.getScalarField(componentLabel='U3')
maxp = max([(g.data,g.nodeLabel) for g in field.values ])
minp = min([(g.nodeLabel) for g in field.values])
nodel_label_01=minp
nodel_label = maxp[1]
coordinate = f.nodes[nodel_label].coordinates
coordinate_01 =f. nodes[nodel_label_01].coordinates
Maximum_deflection = maxp[0]
p_1 = coordinate[0]
t_1 = coordinate[1]
g_1= coordinate_01[0]
w_1= coordinate_01[1]
Min_2_x.append(g_1)
Min_2_y.append(w_1)
Max_2_x.append(p_1)
Max_2_y.append(t_1)
I simulated a pile embedded in sand soil. The pile was subjected to lateral and vertical forces. The model was aborted. I have printed the "Job Diagnostic" to present the causes of the aborted model. The problem occurred because of the nodes at the contact surfaces between the soil and pile. Some nodes were overclosure, and others separated, as presented in the figure below. How can I solve this problem?
I am running a model of concrete SOLID65 with LINK (bar) elements.
I have attached below my material properties and failure criteria.
The model has not converged yet.
Any tips on how to make the model converge?
Is their any FE modeling software to create porous structure in any solid model.
Basically I am designing acetabular cup in CREO on which i want to create trabecular porous structure on articulating surfaces. But I am unable to create porous structure in model.
I tried in ANSYS too but failed.
Any suggestion please..
Dear Researchers,
i am using a python script for a parametric study. This script generates .odb files automatically. The problem is, that i can't open the files with ABAQUS cause the Output database created by python is too recent. Error message: "... .odb is from a more recent release of ABAQUS."
The Version of python used by my ABAQUS Version is 2.7.3.
I would be glad about any tips on how to solve this problem. Unfortunatley upgrading ABAQUS is not an Option at the moment
Thanks in advance
Dear researchers,
I am just trying to vibrate a plate with a horn (see attached figure) in one direction with ultrasonic vibrations in Abaqus. I am new to Abaqus, how can I apply an external vibration/vibrational load to surface of a plate? Harmonic analysis needs a force but can I manipulate it as a vibration? I am open to any suggestions.
I have a streel structure and the welds need to be merged in share topology in SpaceClaim in order for the elements of both parts to match.
But the contact between beam must no be merged in shared topology so that I can make a contact frictionless in Mechanical.
I can only manage to either separate all bodies so that they all make contacts (but mesh does not match) or merge all bodies so that mesh matches (but no contact surfaces are created and I cannot make the beam-beam contact frictionless).
How to implement the crystal plasticity finite element model in Ansys?
Hello, I have a static general simualtion, for which I hace created a specific Field Output request asking for those results (image).
However, when I check the results I don't have the option to choose these (image2)
Does anyone know why this is happening?
Thanks in advance
A pin on disc under lubricated sliding wear.
Dear all
Please find attached the image T.jpg.
The image of the FE model attached is a hollow body with some prismatic textures on the interior surfaces. Here I need to select all the nodes at the interior surfaces of the FE model. I have tried to use:
NSEL, S, LOC, X, X1, X2
but as the body is having a certain curvature on one side, all the required nodes are not getting selected. And as the number of nodes is many i.e. above 100000, graphical picking seems to be a cumbersome task.
Please help.
Dear All
I need laboratory data to do a scientific research on cross laminated timber. I want to use artificial neural networks combined with meta-heuristic algorithms. Data can be suitable for my study work in any of the following cases:
Adhesive
Axial strength
Compressive strength
Bending
Connections
Damage
Finite Element
Panel
Fire
Multi stories
Shear
Shear walls
Are there websites, laboratories, or papers that can be used from them to collect or receive data?
Could you please kindly help me?
Best Regards
Mehdi Nikoo
I am simulating piled raft foundation subjected to seismic load (earthquake) in ABAQUS. I have modeled soil as solid elements and Mohr-Coulomb parameter. I want to know how can I apply geometric damping (silent boundary) to prevent the reflection of seismic waves?
Hello everyone,
In some articles, some authors report the experimental values of Young modulus, yield strength and ultimate strength; but the ultimate strain values aren't reported (mostly for bolts). In that case, when using the data for an FE simulation in ABAQUS, what value of ultimate strain could be used?
Thanks for your time.
Hello everyone.
I am encountering some problems while chasing after the convergence of my model.
I am using Ansys APDL in order to model the creep in steel under high temperatures.
I already did all the code, but I cannot find the issue.
All the geometry is very simple, just a cantilever beam under tension stresses.
The material model is composed by the multilinear elastic model, multilinear isotropic hardening model, creep model (time hardening P+S) and thermal strains.
The solution is divided in three stages:
- applying the uniform temperature;
- applying the force;
- enabling the creep effect by turing the rate on.
Even though, there is no convergence, and the log file keeps showing this:
"Material property EX of material 1 of element 2 is evaluated at a temperature of -14571.8048, which is below the supplied temperature range. Temperature range checking terminates."
Due to the excessive amount of errors and warnings, the program terminates. I've already looked in lots of discussions and could not find any situation similar to mine.
Here is what my solution steps looks like:
/SOLU
ANTYPE,0
NLGEOM,ON
OUTRES,ALL,ALL
NROPT,FULL
DK,1, , , ,0,UX,UY,UZ,ROTX,ROTY,ROTZ,
!-------------------------------------------------------------------------------
FK,3,FZ,1000
SBCTRAN
RATE,OFF
TIME,1e-8
AUTOTS,1
NSUBST,100,10000000,10
KBC,0
SOLVE
!-------------------------------------------------------------------------------
/SOLU
NLGEOM,ON
OUTRES,ALL,ALL
NROPT,FULL
BFL,ALL,TEMP,500
SBCTRAN
RATE,OFF
TIME,0.10
AUTOTS,1
NSUBST,100,10000000,10
KBC,0
SOLVE
!-------------------------------------------------------------------------------
/SOLU
NLGEOM,ON
OUTRES,ALL,ALL
NROPT,FULL
RATE,ON
TIME,1000
AUTOTS,1
NSUBST,100,10000000,10
AUTOTS,1
KBC,0
SOLVE
Anyhow, I've attached the .txt file (sorry for the portuguese comments, they help me to go through the problem).
If someone could give me a help, I'd be very grateful!
Kind Regards,
Arthur
FEM has widely been used for large scale point specific slope stability analysis. I am looking for a program to perform FEM that is available for free and also stands up to research standard.
I am now modelling shell and tube heat exchanger using COMSOL Multiphysics 5.3a.
I have several questions:
1. What is the benefit of modelling these equipments in finite element software, in terms of safety?
2. Does this FEM software really helpful on consultant engineer in designing the equipment. If yes, in what way? If not, why?
3. Do FEM software really credible and powerful? Many of the journal state that the error obtained ~15%, but ain't this software too good to be true?
4. One with skills using FEM software, is it in demand?
Thank you for answering!
Dear Abaqus users,
I perform a static analysis with a Standard module on a masonry wall macro model. Four surfaces interact with a reference point in the middle of the model as in the photo attached. Out-of-plane displacement defined on this reference point. Deformed shape and the damage profile matches perfectly with the test. But the curve of the upper point displacement and the reaction force at the base prone upwards (as seen in the attached photo).
Is that issue related with the material properties (concrete damaged plasticity material properties attached) or the constraint defined on the reference point ?
Thanks in advance !!
Dear Researchers :
If someone is proficient in COMSOL and knows about the physics and applications of Electric Power Cables
Can help me on solving this model? What am I doing wrong ?
I need to compute the Temperature Distribution of this 2D model of a MV (35 kV) Power Cable.
The configuration is simple, and the application if for 25 kV AC.
I used a Study in two Steps
Step 1: a Frecuency Domain Analysis to solve first the Electric Currents (ec) and the Magnetic Fields (mf) physics. Followed from a
Step 2: a Stationary Study to solve the Heat Transfer phenomenon and its coupling with the (ec).
I'm attaching this image to shown how I can't get a Temperature Gradient, the Gradient I am getting is so tiny that practically the Temperature is uniform across all the Cable.
I'm doing something wrong
I'll appreciate the help,
Best Regards !
Hello, dear experts!
I need to create a mesh for Finite Element Method in 3D space around the junction of two hollow cylinders. This represents two intersecting oil wells.
I need hexahedral shape for cells (elements).
I've found a way to generate a mesh around one cylinder using cylindrical coordinates to arrange the mesh nodes (https://i.stack.imgur.com/vjGiK.png), but can't find a way to adapt this approach to generate hexahedral cells in the area of cylinders junction.
The main question: is there any software or algorithm that can help me to generate the desired mesh? Either freeware, or not. I mean specifically mesh generator as a separate tool.
If I have to develop algorithm by myself, what approach could you recommend to do that?
What literature could help?
Any advice and comment on the subject will be appreciated.
Hi,
I am trying to model a wall with an opening in Opensees, when I use the "block2D" command, it doesn't allow me to draw multiple shapes to form the opening. I was wondering if anyone can guide me on how to draw a wall with openings in opensses.
this command only accepts nodes tag 1to4. How can I get around the problem?
block2D $nx $ny 1 1 $Plate 1 {
1 0 0 0
2 5 0 0
3 5 5 0
4 0 5 0
}
Assuming a 2D or 3D thermal model representing a sample of different Z (thickness) layers, is there a way to calculate each layer's thermal resistance within ANSYS Mechanical APDL software?
Dear researchers :
Can one help me with the following mode? :
I'm trying to solve a simple Heat Conduction scenario of Heat Transfer between the core of a burried Electrical Insulated Cable, and the surrounding soil.
This Cable has several layers of components and is being heated by the Joule Heating Effect do to the current supplied .
I already set-up the geometry, assigned the materials, and I am using the Boundary Condition of "Thermal Insulation" and "Heat Source" in the central conductor (W=I^2 * R)
I'm traying to solve the model with a simple mesh, but I don't know what I am missing ,
This is the error I'm getting from the solver (image attached)
I will really appreciate someone's help
Best Regards !
I have learned a few ways to improve the accuracy of the solution other than just increasing the mesh size. Here are they:
1. Decrease relative tolerance ~ usually in 10^-5.
2. Increase iterative refinements
3. Use different solver with 2 level solutions improves a lot
4. If u are using a time-dependent study ~ change the time taken by the solver ~ take time steps restricted to some min value or choose intermediate steps.
5. Don't use anything like andersan acceleration to get the convergence earlier.
6. Termination technique in solver ~ use solution + tolerance based ~ NOT the iterations based.
7. Play with scaled option ~ rather automatic use a defined value ~ normally its the max possible (usually if ur soln doesn't converge it is the best way to normalize the variables that are being solved).
If u know more please do share.
Cheers!
Hi all,
is it possible to solve time dependent ode in the boundary in COMSOL?
Please someone let me know.
With regards,
Vivekananda
Hi guys,
i want to do a finite element model of hertzian contact between a sphere and a plate, i have defined contact between them as hard normal contact and frictionless tangential contact, also have defined main and secondary slave as shown in figure attached
but i ended having penetration instead of contact, why is that?
Note: the model is 2D
the model is attached
Please help, thank you
I am a beginner in simulations. I want to simulate the current density in a fiber-reinforced polymer foam. However, I don't have access to COMSOL Multiphysics. Is there a free alternative to it that works well enough?
Dear Researchers :
I need to stablish an AC Voltage of +/-35 kV (max. amplitud) to my model in COMSOL.
It is a 2-D Model, in which I'am trying to compute the Temperature Distribution across the whole cross section.
This is an application for an Underground Energy Cable of AC Medium Voltage.
What I am showing here is the geometry of the Cable with all its corresponding layers of insulation, and the bundle of conductors at the core.
My question is :
How I can set it up with the condition of an AC Voltage/Current rather than a DC Voltage.
Regards !:)
Dear Researchers,
I hope you are all doing well,
I have a structure having inclined BEAM188 elements and I am using the element table to find axial stresses in members.
Element table -> By sequence number -> Ls
but I am not sure which value to put after LS,
is it LS, 1 LS, 2 LS, 3 LS, 4 ... LS, 30, LS, 31?
I noticed that LS, 3O gave the highest result
but what is the correct way to know which LS, to plot?
Thanks
My SOLID65 element is reinforced concrete but what modulus of elasticity and material properties do I put? For nonlinear analysis
I want my ABAQUS script to read values from excel (these values will be used to create the FE Model). After the analysis, I want to extract the results (for example, maximum displacement) and save it in another excel file.
After meshing, I want to create a set comprising of all the nodes on a particular surface of a part (in my case, the top surface of a hollow cylinder). I successfully created the node set in the GUI but for a parametric study, I will be considering many different cylinders. So I want to generalize using a python script.
In the stress results, I get two stress values for the same node and the following error
" BEAM/PIPE elements are detected in the selected element set. They are ignored in the nodal averaging "
What could be the reason?
I modeled a concrete deck slab on top of steel girders in ANSYS APDL
but my results for the bending stress (X component stress) from ANSYS do not match what I obtained from hand calculations Using Mc / I
using Mc / I i obtained 29 MPa
and from ANSYS i got 10 MPa
i attached below my calculation as well as my model and elements used.
i used MPC184 rigid link to connect between the concrete deck slab shell element and top flange steel girder.
the slab is simply supported (roller and pin)
any idea what might be wrong?
Dear Researchers :
I need help,
I am trying to solve for the Temperature distribution of a 2D model of a Medium Voltage Power Cable, with all its components. This is a 2D model,
And I am considering the Cable is burrie underground.
So far, I was able to run the solution and get an arbitrary distribution of Temperatures, since I am writing an arbitrary value for the Heat Source.
But, How I can fix the value of the Heat Source correctly ? Does anyone know ?
I am attaching the image of my model where the information of the "Heat Source" has to be written
Do I have to use a "General Source", a "Linear Source" or a "Heat Rate" ?
I'll appreciate any help
Best Regards !
When I define the beam cross section and give it b and h dimensions,
I notice that ANSYS switches the b and h after i mesh and assign the element
it switches the height with the width and vice versa,
Is it fine, do I complete and would the solution be correct?
Or, shall I switch my h and b (height and width) in the beam tool when I define the beam dimensions?
Dear Researchers :
I will appreciate if someone can give me some help with this issue
I already have my 2D-model of a Power Energy Cable in COMSOL Multiphysics.
But so far I haven't been able to model the Heat Transfer and Temperature Distribution in the Cable due to the Joule Effect.
The Cable works under a DeltaV = 25 000 kV, has a Longitude of 1 m , its dimensions are given, as well as the material properties.
But I don't know how to stablish this condition in the model under the 'Heat Transfer in Solids' physics
I also selected the 'Joule Electromagnetic Heating' effect to include into my model, but I cannot solve the Temperature correctly.
How do I have to consider this condition? What Boundary Condition (or Domain Condition) do I have to use on the model ?
Thak you for any help !
Regards ! :)
Dear Researchers, I ask for help;
This is in COMSOL Muliphysics ver.5.6
I am tryring to solve a model of an Energy Power Cable which is burried in the soil, is a 2D model
I choose to couple the phenomena of: -Electrostatics, -Electric Currents and -Heat Transfer in Solids (this last one is coupled using the 'Electromagnetic Heating' sub-module within the AC/DC module).
I already could solve the Electric Potential and the Electric Field (both, E and D) distribution,
But as much as I tried, I cannot understand how to solve correctly the Heat Transfer part of the model
The coupled phenomenon of Heat Transfer is due to the Joule Effect, due to the Electric Current/Voltage passing across the conductor.
When I solve for the Temperature Distribution I get :
- All the model is at the same temperature
- The value of the Temperature is negative, and
- This value is x10^18 K
Defenitevely something is wrong, very likely with the boundary condition of the Heat Source I'am trying to stablish.
It could be an evident-to detect mistake, but I cannot understand it
I am attaching the pictures
The first one is of the view 100% zoomed out, to see the complete geometry (I am including the seccion of the soil in my model),
and the second image is the view zoomed in of the geometry of the Cable
Please, does any know, and can help me, Why I cannot solve this model correctly ?
I will really appreciate it,
Best Regards !
While performing the finite element modelling of FRP-hybrid steel and composite structures.
While modeling an FRP-reinforced frame structure under seismic loading.
Dear all,
I wanted to simulate flanges on a wind turbine tower. For this porpuse two different models were created.
1) Using tie constraints. Each segment (3 in total, so 2 connections) has a flange of the form of a shell ring of thickness 0.06 and width of 0.15. Flanges are glued together via tie constraints giving a total thickness of 0.12.(Figure 1)
2) Create a shell ring of thickness 0.12. Instead of using tie constraints and connect two different parts together a shell ring of width 0.15 and thickness 0.12 is created from the beginning.(FIgure 2)
The problem here is I am getting different Von mises stresses for each case. In case 1) max V.Mises is 1.341e6 and its location is at lower flange. In case 2) max V.Mises is 1.146e6 and its location is away from lower flange. I was expecting to get a similar response fro both cases since total thickness of the flange is the same and every other dimension is the same as well as BC. Any ideas will be great.
Ps 1. Please do not mention solids for flanges, I wanted to use shells
Ps 2. I also uploaded the .inp files for both models in case someone have time to take a look. gna_US-> no tie constraints are used , gna-> tie constraints are used
Hello.
I modeled a complex ring in abaqus and with adding below command in keyword, extracted Stiffness matrix with Coordinate format. But output is a .mtx file that listed stiffness for each node (or element). What to do i to assemble this file to reaching to Global stiffness matrix (stiffness matrix for whole part, i mean m(d2x/dt2)+Kx=F)?
*STEP, name=exportmatrix
*MATRIX GENERATE, STIFFNESS
*MATRIX OUTPUT, STIFFNESS, FORMAT=MATRIX INPUT
*END STEP
Hi,
I want to connect two nodes by using a multipoint constraint element MPC184 ( rigid beam / rigid link)
at first, i tried connecting both nodes by a line and then mesh the line and give it MPC184 element attributes but I cannot create a line from node to node on ANSYS. Only from keypoint to keypoint.
The attached image shows what i mean.
how to fix that?
How I can proceed for finite element modelling of micro drilling on Additive manufacturing part. Please provide your valuable suggestions.
What is the shell orientation mean in ANSYS APDL?
Does it mean that if I have a shell on the XZ plane then I set the orientation as 0 degrees as shown in the pictorial view
and if I have a shell on the XY plane then I set the orientation as 90 degrees?
Or does it mean something else? Like the direction of the fibers in the material?
I want to simulate a wind turbine's tower model. The cylindrical part constructed using shell elements (S4R) and the flanges using solid elements(C3D10).Internal stiffneres also included using shell elemnts. Shell and flanges are connected via shell-to-solid constraints.Only geometric non linear analysis is considered with RIKS method.
However Abaqus give me the following warning:Excessive distortion at a total of 4732 integration points in solid (continuum) elements. This warning appears when initial RIKS step is 0.02 and maximum step is also 0.02.However, when I increase the initial step at 0.05 and maximum step at 0.05 I get no warning.
What is this error about? Can affect my results and why initial step has an influence? And how to solve it?
PS: I also upload my .inp file
Dear all,
I want to connect the surfaces of two shell structures (shell rings). For that purpose I was thinking tie constraints. However I am not sure how to do it properly. For example how should I assign thickness offset of each shell part (bottom surface, top surface , middle surface) in order to avoid any inconsistencies?
Best regards
I am modeling a bridge on ANSYS APDL using shell and beam elements. The beams and slab are connected using MPC184 (constrained element).
After I am done modeling and meshing I merge nodes with 0.001 tolerance yet I still get an error saying meshing will produce errors. even when i tried to merge all I still get a warning / error message
After Nummrg,all / Nummrg,NODE .... future commands which depend on the node to solid model connectivity (meshing, mesh, clearing, solid boundary condition transfer, etc.) may not operate properly.
My results are wrong. Is there a step that I messed?
Dear all,
I want to use ring stiffeners in order to increase bending resistance of a cylinder. The rings has outer diameter R1 = 2 and inner diammeter R2 = 1.85. Their thickness is 0.12 . They will be attached in the inner of the cylinder.For modelling them in abaqus, solids or shells should be used and why?
Dear all,
Is a good strategy to simulate thick structures using shell elements instead of solid ones. For example I have a cylinder consisting of 3 parts. The parts are connected with flanges with thickness 5cm on each part and mid--width 15 cm. For cylinder shell elements are used. Regarding the flanges I want to simulate them as rings. Is it good approach to use shell elements (S4R elements in abaqus) for the flange? Will the response getting with shell elements is comparable with solids?
Ps. The cylinder will be subjected to bending loads
How to model delamination results from matrix cracking with XFEM?
Dear all,
I need to do 2D multicrack propagation in a composite laminate (GFRP) in tensile load. I have 3 parts namely (0-90-0 degrees plies). And I already have existing cracks which you can see below in attached pictures. Cracks propagate well, but when it comes to the boundary I couldn’t see correct delamination behavior. Is it possible to simulate delamination because of matrix cracking in Abaqus? I both tried cohesive surface and elements. With the elements it says I cant define XFEM crack zone for the cohesive element. With the surface, during loading I see some overclosures and clearances.
Here are my material properties.
Cohesive Surface:
Knn=Kss=Ktt= 1e6 N/mm3 (which I am not so sure)
Damage Initiation: Maxs damage initiation criteria Normal=Shear1=Shear2=3.4MPa.
Damage evolution criteria: Mixed mode behavior=BK(Power=2.2)
Fracture energy: Normal=Shear1=Shear 2= 0.27 N/mm2.
Also, frictionless tangential behavior, and hard contact.
For 0 degrees ply
Damage Initiation: Maxps=807MPa
Damage evolution criteria: Mixed mode behavior=BK(Power=2.2)
Fracture energy: 0.5, 0.5, 0.01 N/mm
Elastic, type=ENGINEERING CONSTANTS 35100.,9600.,9600., 0.3, 0.3, 0.3, 4000.,4000.4000.,
For 90 degrees ply, I just swap E11 and E33 values, and maxps=15MPa
Can someone suggest me how I can model it and if my material properties are reasonable?
Regards
Berkay
I am working on experimental program comparing voided slab with hollow core and hollow block slabs and I want to simplify the finite element model
Can I model the voided slab in 2d rather thank 3d and how to take the effect of void distribution in both direction in such case?
Dear all,
I am looking for temperature-dependent material properties for aluminum alloys to compare different alloy grades. As for FEM modeling of welding, temperature-dependent properties are very useful. As JMatPro is excellent database software for steel, Nickel, and few other alloys. Is there any domain similar in the case of aluminum alloys? Please kindly suggest any valuable sources for database concern to aluminum alloys.
I have two materials, aluminum and steel, that I am simulating impact on. Both have the exact same material models:
- J-C plasticity and damage
- EOS
- Specific heat and inelastic heat fraction
- Damage Evolution via fracture energy, set to zero for both materials
- Same velocity
- Same contact parameters (Hard contact, frictionless, general contact)
- Element deletion is on for both materials
I get a shear plug formation for aluminum (top image), which agrees with my experiments. But somehow for the steel material, the projectile penetrates through the target material (bottom image).
Even if the response isn't via shear plugging, why is the projectile mesh penetrating the target nodes? I would think the material immediately fractures to form a plug anyway if my fracture energy is set to zero.
Hi everyone,
to calculate the prying forces in the column base plate connections, we need to get the contact reaction between the plate and the concrete, but in my model, I have a part in compression and another one in tension. so how can I evaluate the surface of the plate in tension under the cyclic load ?