Bookmark this page for easy reference to all the resources you need to learn, find examples or solutions, interact with others, or receive support for LS-DYNA.
Hello all,I'm currently testing to figure out how I can analyze the maximum principal strain of 2 solid sets at a time using elout in the Binout option in Ls PrePost. Previously I have always analyzed 1 solid set at a time. For context, I am analyzing 2 separate chambers of the human heart in the TOYOTA THUMS model. I tried setting up a second solid set, but when I open the Binout --> elout --> strain --> solid , I don't see the solid sets separated to pick from, and I just see a big group of elements in the elout branch. Is there any way around this? What have I done wrong to not see the 2 solid sets separately? Thank you in advance, Grant.
Hello! I need help to get some steps to solve a problem during a restart. I'm trying to replicate the example of an earthquake analysis of a dam provided here: https://lsdyna.ansys.com/dams/I organized the example files in separate directories and followed these steps (as described in the example README file):1. Run dam-static.k
2. Run dam-auxiliary.k
3. Copy stat.d3dump01 from the static run (stat.d3full01 for MPP), and aux.gmbin
from the dynamic run, into a separate directory for transient analysis.
4. Run dam-transient.kI'm running on a small Linux machine, with ANSYS 2023 R2, and these are the commands I used:cd 01staticlsdyna -dis -np 8 i=dam-static.k jobid=statcd ..cp 00motion/* 02aux/. ## 00motion contains the ground motion filescp 00motion/* 03trans/.cd 02aux/lsdyna -dis -np 8 i=dam-auxiliary.k jobid=auxcd ../03transcp ../01static/stat.d3dump* .cp ../02aux/aux.gmbin .lsdyna -dis -np 8 i=dam-transient.k r=stat.d3dump01 gminp=aux.gmbin jobid=trnThe error I get is as follows: *** Error 10871 (KEY+871)
For small deck restart, need to add *CHANGE_CURVE_DEFINITION
for curve id 1
in the restart input file
E r r o r t e r m i n a t i o nI could not figure out or find information on how to modify the files to include the *CHANGE_CURVE_DEFINITION keyword and what syntax to use. Any steps to help solve the issue are welcome. Thanks. --Roque LopezRescale team.
Dear everyone,I have been reading some papers that used results of minimum principal stress of concrete to identify compression and tensile regions of the concrete structure. What is the meaning of minimum principal stress result in LS-Prepost and could other stress results be used for this purpose?Best regards,Panha
Dear everyone,I have been working on finding damage results for RC structures. However, I saw all research papers using "effective plastic strain" results in LS-Prepost to represent crack patterns/damage of concrete. What is the meaning of "effective plastic strain" and why is it used to represent crack or damage patterns?Best Regards,Panha
Hello everyone!I am trying to understand the response of a structure on a soil domain by SSI analysis and my model needs to utilize the DRM technique. One of our collaborators has tried to implemented the DRM by following the 'ssi-dynamic' example input deck with some tweaks. In their model, a reduced ROI soil domain was wrapped up in a single-element DRM layer, which was subsequently surrounded by an additional soil layer with the non-reflective boundary defined at the outermost boundary:They defined the structure side of the *INTERFACE_SSI to be the outer surfaces of the reduced ROI and DRM layer, while the soil side was specified to be the inner surfaces of the DRM and Extra Soil layers. The ground motions were prescribed using *LOAD_SEISMIC_SSI on each of the nodes on those surfaces.The model they developed works fine in case of the dynamic ssi model. LS-Dyna just warns by printing some messages similar to the one provided below (from d3hsp):*** Warning 50134 (MPP+134) Tracked node also belongs to reference segments connectivity. This should not cause numerical problems. tied interface # = 1 tracked node # = 1 segment # = 179 segment nodes: 22 463 442 1 Summary of warning messages for interface # = 1 number of warning messages = 4418The structure we want to set up on top of the soil surface is a freestanding tank with a foundation pad. I have established automatic contact surfaces between the pad and bottom of the tank and specified the static SSI interface between the pad and the surface of the ROI soil. When performing the static ssi, the *INTERFACE_SSI previously defined for dynamic SSI (with ID 1) was kept unchanged, and I didn't include the *LOAD_SEISMIC_SSI. The static ssi also completed normally, and ls-dyna didn't complain, except for the aforementioned warnings.However, the model breaks down once I try to do the transient ssi analysis using the restart d3full from static. In that case the solver reports the following errors in the d3hsp01:At line 253932730: *** Error 30264 (INI+264) SSI interface ID: 1 not found in restart fileAt line 253932733: *** Error 30271 (INI+271) # of nodes 4418 in SSI contact interface id 1 do not match stored # of nodes: 890217136I want to understand how to troubleshoot these errors and whether they are related to the manner in which the *INTERFACE_SSI was defined. I know about the implementation and theory of effective seismic input that LS-Dyna employs in the background according to Bielak's 1984 article.Thanks in advance for your valuable insights and time. - Tonmoy.
I want to create a glass material using MAT_JOHNSON_HOLMQUIST_CERAMICS. Could you please give me an example related to this? It would be nice if the physical properties were listed.
Dear everyone,Currently, I am working on model validation by comparing the results of the strain in the rebar at a node or some locations from the experiment with the simulation.Could anyone guide me on how to get this result in LS-DYNA Workbench or LS-Prepost?Thank you
I'm encountering some issues while trying to automate certain manipulations across different .k files. Here's the method I've developed to achieve my goal:Import the STL files.Use element generation to create voxel contours from the STL files.Mesh tetrahedra within the voxel boundaries.I'm currently stuck at the voxel elements generation step. While the manual process works well, I'm facing difficulties when trying to automate it using command lines. Specifically, the elgenerate command doesn't seem to accept the element generation.----elgenerate solid voxel parts 1 88000265pa bysize 1 1 1 outlineonly cubevoxel obbboundelgenerate accept---When executing these commands through the command line, the process stops at the visualization and voxel generation step. The expected outcome, which is creating a new part, isn't happening.Could someone please assist me in resolving this issue?Issue with Command Line Execution: No Part Generation:This is the expected next step by 'elgenerate accept' which creates a new part (not happening when using the command lines...):Edit: I found out that it dosent't show the "Build rendering data" message when it is not working... there is really something not being completed even with the same command lines
Hello, I am setting up a FSI simulation in LS dyna using the S-ALE solver. I would like to set up a coarse mesh for the fluid domain and refine it dynamically, near the Lagrangian structure to which the fluids are coupled(*CONSTRAINED_LAGRANGE_IN_SOLID).The sphere inside is a lagrangian structure (PID=1). I want the S-ALE mesh elements close to the sphere to be refined dynamically. I have tried the following using *CONTROL_REFINE_ALE keycardI have set up a Pressure based refinement condition with the Reference value as 0 so that all ALE solid elements that are coupled to the lagrangian sphere can be refined.MMSID=3 is a MULTI_MATERIAL_GROUP_SET containing all the MM groups in the model (Air and Water). I get the following error when including this keycard to refine the ALE mesh, whereas the solution works fine without the *CONTROL_REFINE_ALE keycard. Could someone please explain if there is a possible solution to this error or if there are mistakes in my model definition.Thanks in advance!
Abhemanyu Palaniswamy Chandrasekaran
April 15, 2024
Hello,I am performing drop test on a FRP wrapped RC beam. When I had input properties of the material T300/5208 in the usual manner it prompted error. So I attempted to input the data in the following manner; but still it shows me error. What part am I getting wrong? How can I fix this error?Regards,Prasad.
I am simply looking to simulate the contact between two rings made of beam elements using the thickness of the beams as the contact "surface". The manual mentions beam-to-beam contact:*CONTACT_AUTOMATIC_GENERAL is asingle surface contact similar to *CONTACT_AUTOMATIC_SINGLE_SURFACEthat also includes treatment of beam-to-beam contact and in doing so,checks along the entire length of the beams for penetration.But my rings don't see each other with this turned on:*CONTACT_AUTOMATIC_GENERAL_ID$# cid title 1 $# surfa surfb surfatyp surfbtyp saboxid sbboxid sapr sbpr 0 1 2 2 0 0 0 0$# fs fd dc vc vdc penchk bt dt 0.0 0.0 0.0 0.0 0.0 0 0.01.00000E20$# sfsa sfsb sast sbst sfsat sfsbt fsf vsf 1.0 1.0 0.0 0.0 1.0 1.0 1.0 1.0
Hi everyone,I am getting an error message when running my simulations. the problem with this error is that first it happens randomly in different time steps and I could not find any solid clue what it might be related to.Here are some details: -error message:"forrtl: severe (157): Program Exception - access violation" since it looked to me like a file write access error from Windows, in one of the cases i just copied my .K file into another folder and it resolved.for this file that i am having trouble with, it used to happen after the 18th time point but after copying the file it is now thrown at the 3rd time point.in my previous files, sometimes i find extra space in the .k file, and correcting it resolves the issue. I writing to see if anyone has any idea what it might be or where i can look to figure it out. Thank you for your response in advance.
As I refine my mesh I keep getting the error in the title. This is run on a HPC. As I refine my mesh I get this problem. My coarser meshes run but the solutions are not satisfactory. I have a spherical charge of 4g with a 325 mm stand-off distance in free air. Below are some traces which are equidistant from the charge mass but taken in different directions. The air block size is a cube with a side length 500 mm and have three planes of symmetry. I start the traces at 0.2 ms. The pressure is in MPa.
Hello, I am trying to use lstasc for topology optimization. I just started to work on manual examples. Still, however when I tried to solve beam example ( file provided by lsdyna manual examples) it just don't start to running and this is same for every case. since its a provided example the constraints and other stuff already defined so ı just click the run. Still, the iterations never starting and I cant see the job on the job status window. I already tried to use command line with "C:\Program Files\ANSYS Inc\v232\ansys\bin\winx64\lsdyna_dp.exe" Also when I checked the ansys license manager it does not even use the dyna license while it shows running.
I am trying to simulate a blade cutting through a pipe. However, I am getting a solver error saying that the energy error is too large. I am very new to this software, so can someone explain to me how to fix this issue.
Whenever I import the .step file into explicit dynamics using discovery, my model (a structure and a wall) only loads the wall. I have copied a picture of the cross section without the wall. This cross section continues for about 1770mm. The .step file is 130 MB. Is there a way to somehow make this model work as it is?pc spec:Processor 13th Gen Intel(R) Core(TM) i9-13900K 3.00 GHzInstalled RAM 32.0 GB (31.7 GB usable)GPU: nvidia rtx 4090ssd: samsung 850 pro
https://github.com/Ice-Citron/FEA-Physics_IA/blob/main/First%20Runnable/final_read%20-%202.khttps://github.com/Ice-Citron/FEA-Physics_IA/tree/main/First%20Runnable/Second%20Runnable I am trying to simulate a railgun of a particular topology and size for my college Physics Coursework. I am very new to LS-Dyna, but has managed to get used to LS-Dyna's structure and everything, etc. I am using the railgun exemplar as my guide. On very above of this post, these 2 links are my GitHub repo which contains the 2 variants of keyword file I created, which are based on the railgun exemplar on LS-DYNA examples: https://lsdyna.ansys.com/em-railgun/#animated-resultThe issue that I am facing is this:I am using the exact same settings as the exemplar, as far as I am concerned. The only difference between my .k file and the exemplar is that I am using a different solid mesh for my railgun, as I will be using a different topology soon after. My mesh is created from .STEP file exported from fusion 360, which I then selected one of the faces, and then mesh it to 1.2mm with auto-mesher, and then used element generation to generate the rest of the component using shell offset to solid shell. I checked the contact of both files, as in penetration and contact edges. The exemplar itself seems to also have penetration + contact edges natively too, and its simulation works despite the initial penetrations. My version is the second one, and even when I try to remove the penetrations, etc. The same error output file is produced, which thus I in a way think penetration isn't the issue here with FEM-BEM solver being unable to converge?I hope someone is willing to attempt to download my .k source files from my git repo, and then try and see if they can solve it, so that it runs like the one in the exemplar.
Hello,I'm using the SPH method in LS-DYNA to simulate the ballistic high-velocity impact problem. I find that the strain energy plot is not consistent with temperature change and pressure plots.Specifically, the material I used for the projectile and target plate are both defined by *MAT_015 (*MAT_JOHNSON_COOK). In the post-processing, the strain energy plot for the very first time frame is shown:It is wired that the maximum strain energy starts at the middle of the target plate when the projectile first contacts it. There is almost no deformation and stress change; the shock wave has just begun. So, there is no reason that the strain energy in the middle becomes the maximum at first.But for the temperature change plot (history variable #5 for *MAT_015_JOHNSON_COOK) and pressure plot, it can be easily seen that the maximum points in the first time frame starts at the contact point.All the results above are calculated by using the R 13.0 solver. Besides, I try to use the latest solver to test the result but for the same job in the R 14.0 solver, the job will be stuck at some point and cannot be fully calculated. So, I changed different mesh sizes and solver with the same setup for other conditions (initial velocity, material properties, etc.), and the result of the strain energy plot has the same problem:The result above is calculated by the R 14.0 solver with coarse mesh.Coincidentally, the maximum point starts at the 16th layer of the SPH plate. I don't know if this error comes from numerical methods or comes from visualization errors. Could help to explain or tell me how to find the correct strain energy distribution in the whole plate? Best,Rong
Hello,How to implement higher order scheme in LS Dyna CESE solver described in the following link.https://link.springer.com/chapter/10.1007/978-981-99-0876-9_5Is the default option in CESE solver first order or second order method ?Regards,Atish
Hello,I want to use the Linux based HPC server of my university. I tried it but it doesn't work. I used the button "write input file" for creating a input file for the HPC. My LS-Dyna model made a .key file and my explicit dynamic model (which i combined with a static structural calculation) made a .dat file. After loading these files up an submitting the job, i get after 30-60 seconds some error messages.LS-DynaExplicit dynamicsDoes anyone have a clue what i'm doing wrong? Thank you!
Hello all,I'm currently testing to figure out how I can analyze the maximum principal strain of 2 solid sets at a time using elout in the Binout option in Ls PrePost. Previously I have always analyzed 1 solid set at a time. For context, I am analyzing 2 separate chambers of the human heart in the TOYOTA THUMS model. I tried setting up a second solid set, but when I open the Binout --> elout --> strain --> solid , I don't see the solid sets separated to pick from, and I just see a big group of elements in the elout branch. Is there any way around this? What have I done wrong to not see the 2 solid sets separately? Thank you in advance, Grant.
Dear everyone,I have been reading some papers that used results of minimum principal stress of concrete to identify compression and tensile regions of the concrete structure. What is the meaning of minimum principal stress result in LS-Prepost and could other stress results be used for this purpose?Best regards,Panha
Dear everyone,I have been working on finding damage results for RC structures. However, I saw all research papers using "effective plastic strain" results in LS-Prepost to represent crack patterns/damage of concrete. What is the meaning of "effective plastic strain" and why is it used to represent crack or damage patterns?Best Regards,Panha
Hello everyone!I am trying to understand the response of a structure on a soil domain by SSI analysis and my model needs to utilize the DRM technique. One of our collaborators has tried to implemented the DRM by following the 'ssi-dynamic' example input deck with some tweaks. In their model, a reduced ROI soil domain was wrapped up in a single-element DRM layer, which was subsequently surrounded by an additional soil layer with the non-reflective boundary defined at the outermost boundary:They defined the structure side of the *INTERFACE_SSI to be the outer surfaces of the reduced ROI and DRM layer, while the soil side was specified to be the inner surfaces of the DRM and Extra Soil layers. The ground motions were prescribed using *LOAD_SEISMIC_SSI on each of the nodes on those surfaces.The model they developed works fine in case of the dynamic ssi model. LS-Dyna just warns by printing some messages similar to the one provided below (from d3hsp):*** Warning 50134 (MPP+134) Tracked node also belongs to reference segments connectivity. This should not cause numerical problems. tied interface # = 1 tracked node # = 1 segment # = 179 segment nodes: 22 463 442 1 Summary of warning messages for interface # = 1 number of warning messages = 4418The structure we want to set up on top of the soil surface is a freestanding tank with a foundation pad. I have established automatic contact surfaces between the pad and bottom of the tank and specified the static SSI interface between the pad and the surface of the ROI soil. When performing the static ssi, the *INTERFACE_SSI previously defined for dynamic SSI (with ID 1) was kept unchanged, and I didn't include the *LOAD_SEISMIC_SSI. The static ssi also completed normally, and ls-dyna didn't complain, except for the aforementioned warnings.However, the model breaks down once I try to do the transient ssi analysis using the restart d3full from static. In that case the solver reports the following errors in the d3hsp01:At line 253932730: *** Error 30264 (INI+264) SSI interface ID: 1 not found in restart fileAt line 253932733: *** Error 30271 (INI+271) # of nodes 4418 in SSI contact interface id 1 do not match stored # of nodes: 890217136I want to understand how to troubleshoot these errors and whether they are related to the manner in which the *INTERFACE_SSI was defined. I know about the implementation and theory of effective seismic input that LS-Dyna employs in the background according to Bielak's 1984 article.Thanks in advance for your valuable insights and time. - Tonmoy.
I want to create a glass material using MAT_JOHNSON_HOLMQUIST_CERAMICS. Could you please give me an example related to this? It would be nice if the physical properties were listed.
Dear everyone,Currently, I am working on model validation by comparing the results of the strain in the rebar at a node or some locations from the experiment with the simulation.Could anyone guide me on how to get this result in LS-DYNA Workbench or LS-Prepost?Thank you
I'm encountering some issues while trying to automate certain manipulations across different .k files. Here's the method I've developed to achieve my goal:Import the STL files.Use element generation to create voxel contours from the STL files.Mesh tetrahedra within the voxel boundaries.I'm currently stuck at the voxel elements generation step. While the manual process works well, I'm facing difficulties when trying to automate it using command lines. Specifically, the elgenerate command doesn't seem to accept the element generation.----elgenerate solid voxel parts 1 88000265pa bysize 1 1 1 outlineonly cubevoxel obbboundelgenerate accept---When executing these commands through the command line, the process stops at the visualization and voxel generation step. The expected outcome, which is creating a new part, isn't happening.Could someone please assist me in resolving this issue?Issue with Command Line Execution: No Part Generation:This is the expected next step by 'elgenerate accept' which creates a new part (not happening when using the command lines...):Edit: I found out that it dosent't show the "Build rendering data" message when it is not working... there is really something not being completed even with the same command lines
Hello, I am setting up a FSI simulation in LS dyna using the S-ALE solver. I would like to set up a coarse mesh for the fluid domain and refine it dynamically, near the Lagrangian structure to which the fluids are coupled(*CONSTRAINED_LAGRANGE_IN_SOLID).The sphere inside is a lagrangian structure (PID=1). I want the S-ALE mesh elements close to the sphere to be refined dynamically. I have tried the following using *CONTROL_REFINE_ALE keycardI have set up a Pressure based refinement condition with the Reference value as 0 so that all ALE solid elements that are coupled to the lagrangian sphere can be refined.MMSID=3 is a MULTI_MATERIAL_GROUP_SET containing all the MM groups in the model (Air and Water). I get the following error when including this keycard to refine the ALE mesh, whereas the solution works fine without the *CONTROL_REFINE_ALE keycard. Could someone please explain if there is a possible solution to this error or if there are mistakes in my model definition.Thanks in advance!
Abhemanyu Palaniswamy Chandrasekaran
April 15, 2024
Hello,I am performing drop test on a FRP wrapped RC beam. When I had input properties of the material T300/5208 in the usual manner it prompted error. So I attempted to input the data in the following manner; but still it shows me error. What part am I getting wrong? How can I fix this error?Regards,Prasad.
I am simply looking to simulate the contact between two rings made of beam elements using the thickness of the beams as the contact "surface". The manual mentions beam-to-beam contact:*CONTACT_AUTOMATIC_GENERAL is asingle surface contact similar to *CONTACT_AUTOMATIC_SINGLE_SURFACEthat also includes treatment of beam-to-beam contact and in doing so,checks along the entire length of the beams for penetration.But my rings don't see each other with this turned on:*CONTACT_AUTOMATIC_GENERAL_ID$# cid title 1 $# surfa surfb surfatyp surfbtyp saboxid sbboxid sapr sbpr 0 1 2 2 0 0 0 0$# fs fd dc vc vdc penchk bt dt 0.0 0.0 0.0 0.0 0.0 0 0.01.00000E20$# sfsa sfsb sast sbst sfsat sfsbt fsf vsf 1.0 1.0 0.0 0.0 1.0 1.0 1.0 1.0
Hi everyone,I am getting an error message when running my simulations. the problem with this error is that first it happens randomly in different time steps and I could not find any solid clue what it might be related to.Here are some details: -error message:"forrtl: severe (157): Program Exception - access violation" since it looked to me like a file write access error from Windows, in one of the cases i just copied my .K file into another folder and it resolved.for this file that i am having trouble with, it used to happen after the 18th time point but after copying the file it is now thrown at the 3rd time point.in my previous files, sometimes i find extra space in the .k file, and correcting it resolves the issue. I writing to see if anyone has any idea what it might be or where i can look to figure it out. Thank you for your response in advance.
As I refine my mesh I keep getting the error in the title. This is run on a HPC. As I refine my mesh I get this problem. My coarser meshes run but the solutions are not satisfactory. I have a spherical charge of 4g with a 325 mm stand-off distance in free air. Below are some traces which are equidistant from the charge mass but taken in different directions. The air block size is a cube with a side length 500 mm and have three planes of symmetry. I start the traces at 0.2 ms. The pressure is in MPa.
Hello, I am trying to use lstasc for topology optimization. I just started to work on manual examples. Still, however when I tried to solve beam example ( file provided by lsdyna manual examples) it just don't start to running and this is same for every case. since its a provided example the constraints and other stuff already defined so ı just click the run. Still, the iterations never starting and I cant see the job on the job status window. I already tried to use command line with "C:\Program Files\ANSYS Inc\v232\ansys\bin\winx64\lsdyna_dp.exe" Also when I checked the ansys license manager it does not even use the dyna license while it shows running.
I am trying to simulate a blade cutting through a pipe. However, I am getting a solver error saying that the energy error is too large. I am very new to this software, so can someone explain to me how to fix this issue.
Whenever I import the .step file into explicit dynamics using discovery, my model (a structure and a wall) only loads the wall. I have copied a picture of the cross section without the wall. This cross section continues for about 1770mm. The .step file is 130 MB. Is there a way to somehow make this model work as it is?pc spec:Processor 13th Gen Intel(R) Core(TM) i9-13900K 3.00 GHzInstalled RAM 32.0 GB (31.7 GB usable)GPU: nvidia rtx 4090ssd: samsung 850 pro
https://github.com/Ice-Citron/FEA-Physics_IA/blob/main/First%20Runnable/final_read%20-%202.khttps://github.com/Ice-Citron/FEA-Physics_IA/tree/main/First%20Runnable/Second%20Runnable I am trying to simulate a railgun of a particular topology and size for my college Physics Coursework. I am very new to LS-Dyna, but has managed to get used to LS-Dyna's structure and everything, etc. I am using the railgun exemplar as my guide. On very above of this post, these 2 links are my GitHub repo which contains the 2 variants of keyword file I created, which are based on the railgun exemplar on LS-DYNA examples: https://lsdyna.ansys.com/em-railgun/#animated-resultThe issue that I am facing is this:I am using the exact same settings as the exemplar, as far as I am concerned. The only difference between my .k file and the exemplar is that I am using a different solid mesh for my railgun, as I will be using a different topology soon after. My mesh is created from .STEP file exported from fusion 360, which I then selected one of the faces, and then mesh it to 1.2mm with auto-mesher, and then used element generation to generate the rest of the component using shell offset to solid shell. I checked the contact of both files, as in penetration and contact edges. The exemplar itself seems to also have penetration + contact edges natively too, and its simulation works despite the initial penetrations. My version is the second one, and even when I try to remove the penetrations, etc. The same error output file is produced, which thus I in a way think penetration isn't the issue here with FEM-BEM solver being unable to converge?I hope someone is willing to attempt to download my .k source files from my git repo, and then try and see if they can solve it, so that it runs like the one in the exemplar.
Hello,I'm using the SPH method in LS-DYNA to simulate the ballistic high-velocity impact problem. I find that the strain energy plot is not consistent with temperature change and pressure plots.Specifically, the material I used for the projectile and target plate are both defined by *MAT_015 (*MAT_JOHNSON_COOK). In the post-processing, the strain energy plot for the very first time frame is shown:It is wired that the maximum strain energy starts at the middle of the target plate when the projectile first contacts it. There is almost no deformation and stress change; the shock wave has just begun. So, there is no reason that the strain energy in the middle becomes the maximum at first.But for the temperature change plot (history variable #5 for *MAT_015_JOHNSON_COOK) and pressure plot, it can be easily seen that the maximum points in the first time frame starts at the contact point.All the results above are calculated by using the R 13.0 solver. Besides, I try to use the latest solver to test the result but for the same job in the R 14.0 solver, the job will be stuck at some point and cannot be fully calculated. So, I changed different mesh sizes and solver with the same setup for other conditions (initial velocity, material properties, etc.), and the result of the strain energy plot has the same problem:The result above is calculated by the R 14.0 solver with coarse mesh.Coincidentally, the maximum point starts at the 16th layer of the SPH plate. I don't know if this error comes from numerical methods or comes from visualization errors. Could help to explain or tell me how to find the correct strain energy distribution in the whole plate? Best,Rong
Hello,How to implement higher order scheme in LS Dyna CESE solver described in the following link.https://link.springer.com/chapter/10.1007/978-981-99-0876-9_5Is the default option in CESE solver first order or second order method ?Regards,Atish
Hello,I want to use the Linux based HPC server of my university. I tried it but it doesn't work. I used the button "write input file" for creating a input file for the HPC. My LS-Dyna model made a .key file and my explicit dynamic model (which i combined with a static structural calculation) made a .dat file. After loading these files up an submitting the job, i get after 30-60 seconds some error messages.LS-DynaExplicit dynamicsDoes anyone have a clue what i'm doing wrong? Thank you!
Community