2022 Copyright ANSYS, Inc. All rights reserved. Ansys does it in order to try to solve the problem quicker. When you solve the project it shows the total time required for the project and also the percentage of simulation c. SOFTWARE, getting zero maximum and minimum stress value in explicit analysis. I very much appreciate your help. I think a possilble reason is the use of second order implicit method. Sign up here. Clock Time Remaining: -SIMULATION ELAPSED TIME SUMMARYEXECUTION FROM CYCLE 0 TO 1ELAPSED RUN TIME IN SOLVER = 3.79867E-01 MinutesTOTAL ELAPSED RUN TIME = 3.79900E-01 MinutesJOB RAN OVER 4 SLAVESJOB RAN USING Intel MPIJOB RAN USING DECOMPOSITION AUTOProblem terminated . no cell controlling time step. time. Earth Rescue reveals what visionary companies are doing today to engineer radical new ideas in the fight against climate change. I am using explicit dynamics and i am facing an error of time step is too small ? I also have a second question. small. There are many ways to avoid that. ANY INPUT WOULD BE HELPFUL. You may try to use a higher order explicit method and keep the CFL number small enough. Click here to watch the first episode. Use the Mesh Metrics to see the elements with the smallest characteristic length. 1. Or is it something else? Clock Time Remaining: -Cycle: 1, Time: 1.539E-08s, Time Inc.: 1.539E-08s, Progress: 0.02%, Est. Check out more than 70 different sessions now available on demand. Privacy Policy. That's how I tag people? I tried making the max energy error 1e6, and time step safety factor 0.9. .003 seconds, 50k nodes. Subscribe to the Ansys Blog to get great new content about the power of simulation delivered right to your email on a weekly basis. None of the advices mentioned there solved the problem . i have tried changing mesh size and i have tried changing maximum time step but i am unable to overcome this error but on the other side when i use a big size element mesh without using Automatic Meshing so now the remaining clock time starts increasing and increasing can i get an answer that how my remaining clock time should start decreasing instead of increasing. I'm trying to simulate a bullet hitting a wall at 500 m/s and the simulation keeps on getting interrupted by the error in the title and I'm wondering if anybody on this sub could help. Meanwhile, I performed a very similar simulation wherein there was some distance between the "projectile" and the plate. Based on the formulation to calculate material sound velocity and time-step requirement, the larger the material's mass is, the larger the required time-step can be. Let's find out in this lesson! Reddit and its partners use cookies and similar technologies to provide you with a better experience. I reached the max element No limit. This condition implies that the timestep be limited such that a disturbance (stress wave) cannot travel farther than the smallest characteristic element dimension in the mesh, in a single timestep. Search for jobs related to Time step too small ansys or hire on the world's largest freelancing marketplace with 19m+ jobs. I am using explicit dynamics and i am facing an error of "time step is too small" . Thank you, have a nice one. It's free to sign up and bid on jobs. Seems this is caused by really small elements? Generally rather than doing say 40 iterations in one time-step, it is desirable to reduce the time-step size to half the amount to do 20 iterations for two-steps (2x20=40 instead of 1x40=40). Ansys Learning 21.4K subscribers This video lesson shows that explicit time integration works best for fast events like a car crash or a bullet impact that occur in the range of milliseconds to. Minimum Time Step: This will be the minimum time step value inside the selected step in 'Current Step Number'. Join us for this special virtual event on October 18-19, including presentations on MBSE, systems engineering, safety, embedded software, and cyber security. So according to the CFL condtition dt=6e-9s. i have same problem, how to create that kind of mesh? By controlling mesh statistics. How can I fix this? Which RANS model predicts reattachment length formed at the step consistent with. i am performing impact analysis on canopy of an aircraft upon bird hit strike. Running an explicit dynamics simulation on a composite plate. Create an account to follow your favorite communities and start taking part in conversations. Login. Learn methods and guidelines for using stereolithography (SLA) 3D printed molds in the injection molding process to lower costs and lead time. Moving this question to the Structural Mechanics thread for more visibility on this question. By accepting all cookies, you agree to our use of cookies to deliver and maintain our services and site, improve the quality of Reddit, personalize Reddit content and advertising, and measure the effectiveness of advertising. 2. analysis Materials: plate explicit steel, projectile explicit brass, both eroding on max plastic strain, Geometry: projectile L=20mm, d=8mm, plate D=200mm, t=10mm, distance between the two 20mm, plane symmetry option used (90deg. Get inspired as you hear from visionary companies, leading researchers and educators from around the globe on a variety of topics from life-saving improvements in healthcare, to bold new realities of space travel. Close this window and log in. Thus the timestep criteria for solution stability is (check help for the equation). Multisim : Time Step Too Small. With content from Ansys experts, partners and customers you will learn about product development advances, thought leadership and trends and tips to better use Ansys tools. The meshing in the impact zone is fairly homogeneous, while the projectile meshing comprises mainly "triangular" elements of rather equal sizing. Thank you for helping keep Eng-Tips Forums free from inappropriate posts.The Eng-Tips staff will check this out and take appropriate action. Take a leap of certainty and check out a session today here. You can always decrease the minimum time step to continue the calculation. r/ANSYS is the subreddit to discuss everything related to the FEM simulation software ANSYS. You could try to increase that value. basically, the time step has to be smaller than the time it takes for a load wave to propigate across the smallest element, and the speed of wave propigation is related to material density. 09 October 2015 1,419 7 View Camrie Caruso, 272; 8. How do get Full values instead of just minimum and maximum ? Here are some details: Materials: plate explicit steel, projectile explicit brass, both eroding on max plastic strain I tried to manipulate with the solution setting and meshing (Im not good at meshing though) but to no avail. Ansys does it in order to try to solve the problem quicker. Check out more than 70 different sessions now available on demand. You've already answered your question. Jul 11, 2022. For more information, please see our Ultiboard. Join your peers on the Internet's largest technical engineering professional community.It's easy to join and it's free. You must be logged in to reply to this topic. I can see @SandeepMedikonda is experienced in the matter of Explicit Dynamics. I don't mean to be rude, but if I knew where to read about it, I wouldn't ask. Do implicit and explicit methods use time-steps of similar sizes? Also, the definition of time step properly is very important. Anyone know how to fix my workbench 2022 R2 it wont Press J to jump to the feed. Click on the left most bar and the elements highlight. Please read the thread for more info on how to mesh that geometry. It took a lot of time until I found out that word's prohibited. i have tried changing mesh size and i have tried changing maximum time step but i . By rejecting non-essential cookies, Reddit may still use certain cookies to ensure the proper functionality of our platform. Please visit. Answer: Hello, You can reduce the solving time of an ANSYS EXPLICIT dynamics solver by 1. The mesh is imported automatically when you're using Explicit Dynamics. . I will remodel the geometry. What's important for me is to learn how to properly set such simulations , not just to solve that one. By lowering the number of cycles in analysis settings. and our I don't know what mean "automatically" I can import mesh data to AUTODYN, but there is no option to import to explicit, anyway, cutcell is for fluent solver so i don't know if it would work, that why i would liek to know how you did it. Thus the timestep criteria for solution stability is (check help for the equation). Reddit and its partners use cookies and similar technologies to provide you with a better experience. Earth Rescue reveals what visionary companies are doing today to engineer radical new ideas in the fight against climate change. Click here to watch the first episode. Note: you cannot type the word b u l l e t on the site, it is a prohibited word. I removed all thesmaller elements and reran the simulation, but the same ## warning error appeared. Examine how the principles of DfAM upend many of the long-standing rules around manufacturability - allowing engineers and designers to place a parts function at the center of their design considerations. Handout Previous Lesson Back to Course Next Lesson Continue reading Discussion of Time-Step Size Lesson 3 I tried to manipulate with the solution setting and meshing (Im not good at meshing though) but to no avail. Eddie holds 10th place points and Andrew is 11th; both should move up at a favorite venue. By rejecting non-essential cookies, Reddit may still use certain cookies to ensure the proper functionality of our platform. 1. https://discord.gg/GXBbhav. mesh was body sized with element size of .1mm.tool and workpiece is modeled in solidworks with fixing depth of cut to 1mm in explicit settings: fixed support- 2 faces of workpiece of other side (bottom and left side face) displacement- displacement was given to tool (8mm) towards the workpiece and keeping the workpiece stationary. Thanks. File is attached. How do get Full values instead of just minimum and maximum ? Make sure you do not have extremely small elements (probably elements that are deforming too much). To mesh the structure, I did the following: generate general, sizing 2mm applied to the bullet, sizing 2mm with sphere of influence to the plate centre, sizing 4 elements along the plate thickness. Trying to run a short explicit study. I will try to explain some of them: set the substeps size to a fixed value, by modifying "Analysis Settings" > "Step Controls" "Auto Time Step" to "OFF" and choosing a fixed substep size (or number of substeps) or; I can't find cartesian method. Im doing a projectile penetration/mushrooming simulation. . When I try to solve it,it shows an error: TIME STEP TOO SMALL. "Time step too small" appears when current time step is less than 10 % of the initial time step. Save You must be logged in to reply to this topic. The MIN characteristic length of my mesh is 4e-2 mm. Reltol0.01 7. I need some help with Explicit Dynamics.I need some help with Explicit Dynamics. Time Integration Discussion of Time-Step Size Lesson 3 How large or small does the time-step have to be when using any time integration method? I set erosion on material failure (max strain defined in the engineering data). I see the quality is good only in the very vicinity of the impact zone. . one of the possible problems of time step size could be related to mesh size. I am using explicit dynamics and i am facing an error of "time step is too small" . What should I do with the time step to avoid this problem? Is that fine? It was solved without any problems. ".TRAN""startup" 5. Already a member? If so, you probably. Registration on or use of this site constitutes acceptance of our Privacy Policy. Already a Member? Please let us know here why this post is inappropriate. I found that simply using the Body Fitted Cartesian Mesh control allows the model to run without error. Go to Solution. If I lower the mesh quality, the solution runs fine. Solved! Draft, Time step too small error in Explicit Dynamics. I tried to change the MIN timestep from programme controlled to 1e-15s (or even 1e-25s), but it didn't helped much. As mentioned in Section 26.12.1, it is possible to have the size of the time step change as the calculation proceeds, rather than specifying a fixed size for the entire calculation. I'd be very grateful if you could please adjust the settings. I am trying to measure the reattachment length in Adverse pressure gradient flows over a forward facing step. . 1/20 . Lecture Alternate video link. Save You can easily double the characteristic length with a better mesh. I'm working on an audio power amplifier. analysis Which analysis to use for dynamic and quasi-static compression of auxetic structures? Tags: Multisim. Thanks alot Carlos, thats exactly what i was referring to. Slice the plate to createbetter shaped elements. "Evolving Math Words." In explicit analyses the small elements control the time step. By accepting all cookies, you agree to our use of cookies to deliver and maintain our services and site, improve the quality of Reddit, personalize Reddit content and advertising, and measure the effectiveness of advertising. What is your time step size? Extremely high force convergence criterion. Im doing a projectile penetration/mushrooming simulation. ""Time step too small"" is shown when the current time step is less than 10% of the initial time step. Click here to learn more about this event and register. Have you got any other tips on how to set the Explicit Dynamics solver settings (in general)? ".tran" time step time step Control Panel Control Panel -> SPICE 2. After loading your problem, go to the Controls panel and select Timestep Options. Reasons such as off-topic, duplicates, flames, illegal, vulgar, or students posting their homework. I recreated the schematic from the internet in LTSpice and now I'm getting error: "Analysis: Time step too small; time=1e-006;timestep=1.25e-019;trouble with bzx84c15l-instance d1". By joining you are opting in to receive e-mail. In the study of nanotubes, one defines a zigzag path on a graphene-like lattice as a path that turns 60 degrees, alternating left and right, after stepping through each bond. Change the Minimum Time Step to a very small number, or zero. The same error TIME STEP TOO SMALL appeared. "failure of key exchange and association" - Access Point "objective cell contents must be a formula" error (linear "Payment Method: Not Active" When trying to sale an item. I refined the mesh up to size=0.5mm. In the Geometry program, move the projectile tangent to the plate to start the simulation. You can do that more quickly in CAD. I first only calculated the time step using the second moment of area obtained by (width*height^3)/12 and this gave time step size of approximately 1.3E-6s. When I try to solve it,it shows an error: TIME STEP TOO SMALL. Now I haven't found anything of time step with beam elements from ABAQUS documentation, but I will now assume that it uses the same formulation as LS-DYNA beam element. Click here to learn more about this event and register. We have received your request and will respond promptly. SOFTWARE, solver error time step too small Ansys Learning Forum, Error !!!! step. Promoting, selling, recruiting, coursework and thesis posting is forbidden. Which analysis to use for dynamic and quasi-static compression of auxetic structures? Ansys does not support the usage of unauthorized Ansys software. Search: Rating: 0 ratings / 0 average rating Shippi FREE STUDENT All other time settings are programme controlled. Itgenerated some low-quality mesh on the outer surface of the "projectile", however I quickly managed to refine it using Inflation method. I tried to manipulate with the solution setting and meshing (I'm not good at meshing though) but to no avail. Mass scaling is a simulation method to reduce the run time for large-scale explicit analysis. 26.12.2 Adaptive Time Stepping. Alternate solver 3. I know that a MIN time step is such a time interval in which an elastic wave travels at most 1 MIN cell length/diameter. Please find attached my project archive. It seems the error was due to poor element shapes. 2022 Copyright ANSYS, Inc. All rights reserved. When I try to solve it,it shows an error: TIME STEP TOO SMALL. Press question mark to learn the rest of the keyboard shortcuts. I never would have thought about that. If you compute the wave velocity for your material (root of elastic modulus to density ratio) and multiply by the. I made something similar in meshing tool with cutcell method, but i don't know how to import mesh to explicit. Metal 3D printing has rapidly emerged as a key technology in modern design and manufacturing, so its critical educational institutions include it in their curricula to avoid leaving students at a disadvantage as they enter the workforce. View All (6) 0 Kudos Message 1 of 2 (6,008 Views) Reply. Multisim : Time Step Too Small. discord provided by u/foadsf The overall computational time and cost is the same with the advantage that the solution is more accurate because of the smaller time-step (lower Courant . Get inspired as you hear from visionary companies, leading researchers and educators from around the globe on a variety of topics from life-saving improvements in healthcare, to bold new realities of space travel. Running an explicit dynamics simulation on a composite plate. 1 The climate crisis is here. By selecting auto time scale in solver control and using time scale factor as 1e-4 which makes the time step very small. Normal solver Gear 4. I will apply your method and I will let you know about the outcome. Here we can provide the constrain on the maximum time step. For the attached circuit I am having an issue with a "time-step too small" message. 1 xX_c4Rl-pH1l1P_Xx 4 yr. ago How do I change the step size? There are different ways of it. Make the elements about four times smaller. This is the first time I'm using this program and I have no idea how to fix this. Sign up here. This section provides a brief description of the algorithm that ANSYS FLUENT uses to compute the time step size, as well as an . With content from Ansys experts, partners and customers you will learn about product development advances, thought leadership and trends and tips to better use Ansys tools. When I changed the mesh sizing to 0.7mm, the previous error got replaced by the following one, License acquired!Checking model setup..Please waitGenerating External Faces please waitInitializing..Please waitFinished model setup..Initializing slaves.Cycle: 0, Time: 0.000E+00s, Time Inc.: 1.399E-08s, Progress: 0.00%, Est. Low-Volume Rapid Injection Molding With 3D Printed Molds, Industry Perspective: Education and Metal 3D Printing. But so is the human ingenuity to fight it. The end time is set to 1e-4s. Too. Discover how this hybrid manufacturing process enables on-demand mold fabrication to quickly produce small batches of thermoplastic parts. Draft. beano quiz. I don't really want the mesh to be coarse on the bullet, as I want to inspect its shape after the collision. Time Step too small Ansys Learning Forum, Time step is too small error Ansys Learning Forum, getting zero maximum and minimum stress value in explicit analysis. If you don't have time to solve that, that's fine, I'll do that. Take a leap of certainty and check out a session today here. if the time step is larger than the time it takes for a load to transfer across the smallest element, then the computed displacements will be wrong there will Join us for this special virtual event on October 18-19, including presentations on MBSE, systems engineering, safety, embedded software, and cyber security. Solution. Under Output Controls, set the Result Number of Points to 500 instead of 20. Cookie Notice The climate crisis is here. This condition implies that the timestep be limited such that a disturbance (stress wave) cannot travel farther than the smallest characteristic element dimension in the mesh, in a single timestep. The benefit of eliminating the gap between the projectile and the plate is you don't spend a lot of timewaiting for the solver to move the projectile up to the impact position. Too bad, cause alot of my simulations start off needing a small time step and then don't really require all those little iterations. Keep getting the "Time step too small" error. You need better elements in the projectile also. Refining didn't help. I need some help with Explicit Dynamics. Click Here to join Eng-Tips and talk with other members! Ansys does not support the usage of unauthorized Ansys software. Please visit, FREE STUDENT This ebook covers tips for creating and managing workflows, security best practices and protection of intellectual property, Cloud vs. on-premise software solutions, CAD file management, compliance, and more. From Ansys Help: To ensure stability and accuracy of the solution, the size of the timestep used in Explicit time integration is limited by the CFL (Courant-Friedrichs-Lewy [Courant]) condition. here is a link to some plots that show the change in the scour hole depth as the time step in changed. But so is the human ingenuity to fight it. Time-step Size of the Explicit Method: Mass Scaling (cont.) Subscribe to the Ansys Blog to get great new content about the power of simulation delivered right to your email on a weekly basis. EDIT: I applied your mesh settings. *Eng-Tips's functionality depends on members receiving e-mail. Here are the Google search resultsof the 19 time where the search termexplicit "time step too small" was found. Copyright 1998-2022 engineering.com, Inc. All rights reserved.Unauthorized reproduction or linking forbidden without expressed written permission. time step too small SPICE SPICE Ton0 SPICE See if there are any useful suggestions in them. we can have control over time step in steady state simulation in cfx as it uses pseudo-transient approach to solve the problem. Other Stepping Options Furthermore, the accuracy of nonlinear, dynamic analyses performed in ANSYS Mechanical depends on the definition of smaller minimum time steps allowed. Gmin 1e-10 6. It is also conventional to define an armchair path as one that makes two left turns of 60 degrees followed by two right turns every four steps. mesh was body sized with element size of .1mm.tool and workpiece is modeled in solidworks with fixing depth of cut to 1mm in explicit settings: fixed support- 2 faces of workpiece of other side (bottom and left side face) displacement- displacement was given to tool (8mm) towards the workpiece and keeping the workpiece stationary. is considered in computations), Conditions: initial velocity 4e5 mm/s, plate outer edge fixed. david1-2.ms11 154 KB. // Provide you with a better mesh i will let you know about the of! Method and keep the CFL number small enough doing today to engineer radical new ideas in the against. Multiply by the, Est simulation delivered right to your email on a weekly basis step control -. Method, but the same # # warning error appeared engineer radical new ideas in matter! 4 yr. ago how do get time step too small ansys values instead of just minimum and maximum # warning appeared Meshing in the fight against climate change use a higher order explicit method and i have no how The first time i & # x27 ; m working on an audio power amplifier have changing Leap of certainty and check out more than 70 different sessions now on. Step control Panel control Panel - & gt ; SPICE 2 similar sizes get great new about That one dynamics solver settings ( in general ) timestep Options, students Good only in the matter of explicit dynamics for more information, please see our Notice!, the solution setting and meshing ( Im not good at meshing though ) but to no avail outer fixed! See our Cookie Notice and our Privacy Policy 1 MIN cell length/diameter i can see @ SandeepMedikonda experienced! Create that kind of mesh 'd be very grateful if you compute the velocity Mean to be coarse on the maximum time step too small? found that simply the.: //www.reddit.com/r/ANSYS/comments/9rd3t1/solver_error_time_step_too_small_error_in/ '' > < /a > Thanks step control Panel control Panel - & gt SPICE. Are the Google search resultsof the 19 time where the search termexplicit `` time step using the Body Cartesian Written permission you compute the time step very small number, or students posting their.! Time until i found out that word 's prohibited that word 's prohibited do. For your material ( root of elastic modulus to density ratio ) multiply! Wave velocity for your material ( root of elastic modulus to density ratio ) and multiply by the mesh! Blog to get great new content about the outcome coarse on the site, it shows error., vulgar, or students posting their homework question to the Ansys Blog to great! ; problem terminated to discuss everything related to the Controls Panel and select timestep Options the of! I have no idea how to fix my workbench 2022 R2 it wont Press J jump! Want to inspect its shape after the collision Learning Forum, error!!! Extremely small elements ( probably elements that are deforming too much ) tool with cutcell method but Dynamic and quasi-static compression of auxetic structures help for the equation ) is such a time in The quality is good only in the fight against climate change ; m using this program and have. //En.Wikipedia.Org/Wiki/Carbon_Nanotube '' > KR339: AUTODYN: & time step too small ansys ; 5 and start part! ) 3D printed molds, Industry Perspective: Education and Metal 3D Printing :! Join your peers on the site, it shows an error of time step a! Inc. All rights reserved.Unauthorized reproduction or linking forbidden without expressed written permission: & ;. Making the max energy error 1e6, and time step to a very simulation! Set the Result number of cycles in analysis settings get great new content about the outcome the on. The Structural Mechanics thread for more info on how to create that kind of mesh members receiving e-mail is mm. Rans model predicts reattachment length formed at the step size, as i time step too small ansys inspect! Favorite communities and start taking part in conversations simulation on a weekly basis the MIN timestep from programme controlled 1e-15s! Scaling is a simulation method to reduce the run time for large-scale explicit analysis which analysis to use dynamic. Timestep from programme controlled to 1e-15s ( or even 1e-25s ), but i here Why post. Number, or zero, that 's fine, i 'll do that to! Apply your method and keep the CFL number small enough more visibility on this question n't really want the to. //Www.Eng-Tips.Com/Viewthread.Cfm? qid=323179 '' > Carbon nanotube - Wikipedia < /a > i & # x27 ; s free sign Info on how to mesh that Geometry forbidden without expressed written permission or zero similar simulation wherein was S find out in this lesson mass scaling is a prohibited word solution is. Facing an error: time step is such a time interval in an Low-Quality mesh on the bullet, as i want to inspect its shape after the collision use cookies similar You got any other tips on how to fix my workbench 2022 R2 it Press! The same # # warning error appeared, Est Reddit and its partners use cookies similar! Safety factor 0.9 in general ) order implicit method setting and meshing ( Im not good at meshing though but I think a possilble reason is the first time i & # x27 ; s free to up Reduce the run time for large-scale explicit analysis lead time cutcell method, but i do n't to, while the projectile tangent to the Structural Mechanics thread for more visibility on this question favorite. Molds, Industry Perspective: Education and Metal 3D Printing for using stereolithography ( SLA ) 3D printed, The characteristic length with a better mesh a possilble reason is the human ingenuity to it. > Carbon nanotube - Wikipedia < /a > Thanks simulation, but the # Facing an error: time step too small '' was found using this program i. Of an aircraft upon bird hit strike dynamics simulation on a composite plate up at a favorite.! Set such simulations, not just to solve that, that 's fine, i 'll that In the very vicinity of the algorithm that Ansys FLUENT uses to compute the wave velocity for your (! Molds in the impact zone is fairly homogeneous, while the projectile meshing comprises mainly `` triangular '' elements rather. That simply using the Body Fitted Cartesian mesh control allows the model to without! Please read the thread for more info on how to import mesh to explicit i All. Characteristic length with a better experience know that a MIN time step very small number, or zero i To jump to the Controls Panel and select timestep Options a brief description the! Question to the plate to start the simulation RANS model predicts reattachment length formed at the step? Ratio ) and multiply by the Wikipedia < /a > any INPUT be! Similar technologies to provide you with a better experience to reduce the run for. Thanks alot Carlos, thats exactly what i was referring to FEM simulation software.! To try to use for dynamic and quasi-static compression of auxetic structures ( Im not at. Eng-Tips staff will check this out and take appropriate action change in the fight against climate change J to to! Start taking part in conversations > < /a > 26.12.2 Adaptive time Stepping on The model to run without error simulations, not just to solve the problem quicker 1,419! Solved the problem quicker see our Cookie Notice and our Privacy Policy plate. Upon bird hit strike the `` projectile '', however i quickly managed to refine using Is such a time interval in which an elastic wave travels at 1! Refine it using Inflation method hit strike on members receiving e-mail low-volume Rapid injection molding to Of 20 written permission - NI < /a > email on a composite. The step size, as i want to inspect its shape after the.. Simply using the Body Fitted Cartesian mesh control allows the model to run without error time! Me is to learn how to set the explicit dynamics tips on how fix. Controls, set the Result number of points to 500 instead of just minimum and maximum: ''! The simulation, but i discuss everything related to the FEM simulation software Ansys Notice and our Privacy.. At a favorite venue? id=kA00Z0000019SEISA2 & l=ko-KR '' > KR339: AUTODYN: & quot &. Opting in to receive e-mail ratio ) and multiply by the, go to the plate cell length/diameter to That a MIN time step is such a time interval in which an elastic travels. You do n't have time to solve that, that 's fine, i performed a very small,! Characteristic length method, but the same # # warning error appeared error!!!!!!! Very similar simulation wherein there was some distance between the `` projectile, Perspective: Education and Metal 3D Printing my mesh is 4e-2 mm Multisim: time step too?! You must be logged in to receive e-mail m using this program and i will apply your method i! Wave velocity for your material ( root of elastic modulus to density ratio ) and multiply by.. ) but to no avail 's largest technical engineering professional community.It 's easy to join and it 's. ( Im not good at meshing though ) but to no avail and take action Elastic wave travels at most 1 MIN cell length/diameter elastic wave travels at most 1 MIN cell.! Similar simulation wherein there was some distance between the `` projectile '', however i quickly managed to refine using Dynamic and quasi-static compression of auxetic structures the change in the fight against climate. Certainty and check out more than 70 different sessions now available on demand small! By lowering the number of points to 500 instead of just minimum and maximum ; 2
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