- 37
- 180 741
Santhosh Kumar
India
เข้าร่วมเมื่อ 21 ก.ย. 2013
Ansys Sherlock Random Vibration of PCBA+Enclosure Reliability & Hand Calculcation for Verification
This video explain step-by-step procedure of doing Reliability assessment of PCBA with enclosure subjected to Random Vibration environment.
This also explain how Sherlock calculate Life, Damage and Probability of Failure (PoF) throguh hand calculation.
This also explain how Sherlock calculate Life, Damage and Probability of Failure (PoF) throguh hand calculation.
มุมมอง: 2 787
วีดีโอ
Sherlock Strain Calculation for Part and PCB in Random Vibration Analysis in Ansys V2021R2
มุมมอง 2.4K3 ปีที่แล้ว
This video demonstrate how to Von Misses Stress values available in .rst file of Random Vibration analysis from Mechanical or MPADL is interpreted and Converted as Strain values by Sherlock Random Vibration Life calculation in Sherlock V2021R2.
Ansys WB Sherlock Reliability assessment of Multiple PCBs inside Enclosure
มุมมอง 2.5K3 ปีที่แล้ว
This video demonstrate procedure to align, orient multiple PCBs inside Ansys Sherlock. Take it to Ansys WB assembly inside Mechanical to carryout vibration analyses, take the results to Sherlock for life/reliability predictions.
Ansys Acoustics : Types of Impedance BC
มุมมอง 4.6K3 ปีที่แล้ว
Different types of impedance boundary conditions in Ansys Acoustic analysis. Transfer Admittance Matrix, Impedance Sheet S Matrix, ABCD Matrix, Y Matrix. Transmission line theory
Ansys Linear Perturbation (pre stressed) Modal analysis results on Deformed mesh
มุมมอง 2.5K3 ปีที่แล้ว
Ansys Linear Perturbation (pre stressed) Modal analysis results on Deformed mesh
Stress & Strain life Fatigue with Constant + Fluctuating Load using Ansys nCode
มุมมอง 8K3 ปีที่แล้ว
Ansys nCode demo with Constant Load Fluctuating Load when stress is above Yield Stress limit. Ansys nCode EN Fatigue demo with static mean stress.
Ansys Harmonic Analysis : BoltPreload Rotating Unbalance Force
มุมมอง 2.5K4 ปีที่แล้ว
This video demonstrate procedure to calculate increase / drop in bolt pretension due to rotating harmonic unbalance mass
Ansys HPC PreStressed Modal : Linear Perturbation Spectrum analysis on HPC server
มุมมอง 8474 ปีที่แล้ว
This video demonstrate the procedure Linear Perturbation Spectrum analysis Combine input files to fire on HPC server and download the results back into WB Mechanical for post processing. Same procedure can be used for any linked analysis Like Harmonic, PSD Random Vibration etc,. to combine the input files are fire on HPC server. Though this video is created on V19.2 equally valid for newer vers...
Ansys Acoustics as Understood by Structural Engineer
มุมมอง 10K4 ปีที่แล้ว
Why acoustics simulation and how to make use of acoustic simulation results to refine product design ? Understating Finite Element formulation of Acoustic Equations in structural analysist point of view Ansys acoustic elements Meshing considerations for structural and acoustics domains Acoustics boundary conditions Understanding Complex Impedance boundary conditions Understanding Radiation boun...
Running Ansys Linked Random vibration & MSP Harmonic analysis on Cluster / Server / Queuing manager
มุมมอง 3604 ปีที่แล้ว
This video demonstrate procedure to Setup linked analyses in WB, then Generate input files and fire on Cluster / Queuing Manager
ANSYS MSP Transient analysis with Gap
มุมมอง 8264 ปีที่แล้ว
This video explain procedure for ANSYS (Modal Super Position) setting up MSP Transient analysis with GAPs present in the assembly for sinusoidal, shock and arbitrary time varying loading. Meant for intermediate users who are already familiar with Ansys WB Mechanical, understands pros and cons of MSP over Full Transient analysis. This is not step-by-step tutorial, just idea sharing video to intr...
Ansys /UPF Command procedure
มุมมอง 7K4 ปีที่แล้ว
This tutorial explains how to use /UPF command feature in ANSYS Workbench mechanical for repeated UPF works.
ANSYS ACT External Libraries NumPy SciPy Matplotlib XLRD PPTX ..
มุมมอง 7K5 ปีที่แล้ว
Procedure to use ANSYS ACT with external libraries such as NumPy SciPy Matplotlib Pandas XLRD PPTX ..
ANSYS Creep Simulation of plastic assemblies
มุมมอง 12K5 ปีที่แล้ว
Key learning outcomes: 1. Material data preparation from supplier spec sheet 2. Selection of creep law 3. Creep curve fitting 4. Analysis settings for creep 5. Result interpretation 6. Making design decisions
Ansys Nonlinear Analysis of Incompressible material like Rubber and Plasticity. Part-1
มุมมอง 14K5 ปีที่แล้ว
Contents Basics of stress Stress Tensor Volumetric and Deviatoric Stress components Principal stresses and Invariants Metal Vs Rubber In terms of Stiffness In terms of shear and bulk modulus Locking that makes regular FEM to fail Shear locking Volumetric locking How to identify locking from FEA results ? Overcoming locking with different Element formulations Limitation of displacement based FE ...
Ansys Nonlinear Analysis of Incompressible material like Rubber and Plasticity. Part-2
มุมมอง 8K5 ปีที่แล้ว
Ansys Nonlinear Analysis of Incompressible material like Rubber and Plasticity. Part-2
Geometric Nonlinear analysis using ANSYS
มุมมอง 4.9K6 ปีที่แล้ว
Geometric Nonlinear analysis using ANSYS
Ansys Mechanical Acoustics Doppler effect moving source change in frequency
มุมมอง 3226 ปีที่แล้ว
Ansys Mechanical Acoustics Doppler effect moving source change in frequency
Ansys Mechanical ACT Custom Charts/Graphs
มุมมอง 8K6 ปีที่แล้ว
Ansys Mechanical ACT Custom Charts/Graphs
Ansys V190 UPF Usermat Visual Studio Debugging
มุมมอง 3.1K6 ปีที่แล้ว
Ansys V190 UPF Usermat Visual Studio Debugging
ANSYS ACT WB Screen Captures, sharing model setup with others without actually sharing the WB model
มุมมอง 8156 ปีที่แล้ว
ANSYS ACT WB Screen Captures, sharing model setup with others without actually sharing the WB model
Ansys V190 Acoustic Native Features : Muffler Transmission loss calculation
มุมมอง 11K6 ปีที่แล้ว
Ansys V190 Acoustic Native Features : Muffler Transmission loss calculation
Ansys Nonlinear Rubber Bush Modeling With Springs
มุมมอง 1.7K6 ปีที่แล้ว
Ansys Nonlinear Rubber Bush Modeling With Springs
Ansys ACT Tutorial : ANSYS ACT Extensions for Design Modeler(DM) using CSharp (C#) coding
มุมมอง 7K6 ปีที่แล้ว
Ansys ACT Tutorial : ANSYS ACT Extensions for Design Modeler(DM) using CSharp (C#) coding
ANSYS ACT APP : Intermediate Level Tutorial : Material Assignment to element Named Selection
มุมมอง 5K6 ปีที่แล้ว
ANSYS ACT APP : Intermediate Level Tutorial : Material Assignment to element Named Selection
Virtual shaker 3 axes sine sweep vibration test simulation using Ansys nCode
มุมมอง 12K6 ปีที่แล้ว
Virtual shaker 3 axes sine sweep vibration test simulation using Ansys nCode
Ansys WB Mechanical ACT Command Input Window
มุมมอง 3.2K6 ปีที่แล้ว
Ansys WB Mechanical ACT Command Input Window
Introduction to ANSYS V18.0 ACT App building using C# (CSharp)
มุมมอง 4.5K7 ปีที่แล้ว
Introduction to ANSYS V18.0 ACT App building using C# (CSharp)
Hello sir can you share the excel which calculate the zcf and life for learning
Please send your contact number
Very helpful video
Sir what exactly the material properties Sherlock consider, i have seen the pcb once taken in Ansys mechanical it shows isotropic only
@@Bala92635 as of now when transferred from Sherlock to Mechanical, only isotropic props are considered. If you need orthotropic props for high fidelity simulation, you may overwrite isotropic to orthotropic material props in Mechanical. I think Transferring orthotropic props from Sherlock to Mechanical directly under consideration.
@@SanthoshKumar-ge9sq thank you very much for your reply sir, If I am not wrong Sherlock calculates the effective or average properties of pcb with a given stack up right? What properties it use orthotropic or isotropic
Hi, I've conducted the same analysis as you, but I'm unclear on how you applied the boundary conditions. With the boundary conditions you used, I'm seeing no deformation, stress, or contact pressure. Could you please clarify where on the part I should apply the load, pressure, or displacement?
I am research scholar and I need your help and support in my work
Very helpful video
Hi, your contact details please
Sir, Can you share the excel which you showed or worked on in this video?
Sir. How can one compute coupled and uncoupled acoustic impedance using Ansys?
hello is available for thermal analysis
Thank you for explaining the procedures in detail. Can you please provide the geometry? So that we can try out at our side?
59:00 - Ogden Model
Also I think if you can use only import os and use os.("path\Cpython.exe", -run file.py) to run Cpython files
Actaully I just tried to used the same appraoch to call matlab and mathematica file in ACT. Using OS and the exe file to run your script.
How is the relation, 2:4 between static and modal?
Hello, dear Santosh Kumar. Can you give your email address to talk about acoustics at Ansys? Thank you in advance for the answer.
What is it about exactly? Provide your email id, if something that I can help, I will email you.
thanks for very helpful tutorial, i have generator room to make it acoustic analysis, i will pay for that if you guide me...
Hi, Could you please share the video for Norton Creep model, I tried but could not find it. Thanks in advance! Kind regards Chandra
How can I contact with you for a short chat?
Hi Santhosh sir... how can I contact you??? I am performing modal and harmonic analysis of a dam structure using an acoustic medium on the upstream face. Need help...
Hi Santhosh Kumar, I have a question, can we run a user defined subroutines in Ansys Workbench with Python(Spyder). Thanks in advance Kind regards Chandra
Recently Ansys support some user subroutines in Python language. Refer help manual for exact details.
I am doing dynamic analysis of concrete dam with reservoir as acoustic medium. can anyone help me with the boundary conditions???
Hello Santhosh, First of all, thanks for the presentation! Just brilliant! I’m currently getting into Ansys Acoustics in more depth to solve some muffler and enclosure problems and this will help a great deal! Btw, is the pdf shared somewhere? Or would you be willing to share it otherwise? Best regards!
Dear sir, can we use "mass source" and "incident wave source" together in acoustic excitation?
No, see the definitions @Acoustic documentations Ansys
Sir, 1.can we put sin sweep rate and swept time in ansys ? 2.in n code are we able to get FRF after applying sweep rate and swept time?
Greetings, I am currently intrigued by the prospect of simulating the acoustic characteristics of materials within the ANSYS software platform. Would it be possible for you to furnish me with some ANSYS files analogous to those featured in the video, so that I may have access to informative points of reference? Thank you kindly.
Hi, Santhosh. First of all thank you very much for presenting this tutorial. Very good. What were the measurements of the piece you used? I would like to replicate this example for study purposes.
Hello Santhosh, thanks for the video. My Question refers to the experimental creep data. You have the creep modulus and calculate the creep strain for input into the creep model. Why do you not substract the elastic part? From my point of view your result now contains the elastic deformation from the standard stress-strain curve plus the deformation from the creep modulus curve which also include the elastic part. So is the elastic deformation coming from the standard stress-strain curve now twice in your result? Thanks for your answer
Creep modulus =constant stress /Creep strain. The strain calculated from above formula is pure creep strain. However, it depends on how the data is measured and reported. I agree, where there is a need, then elastic strain part need to be taken care.
@@SanthoshKumar-ge9sq Thank you for your fast answer, that makes sense if the definition of the creep modulus is correct. Solvay writes in the Design Guide you have shown: "The creep modulus is derived by dividing the applied stress by the measured strain after exposure to load for a specified time", what would mean that the strain calculated in the video is not pure creep strain. DIN EN ISO 899 defines the creep strain as the change in length at a given time. The english Wikipedia (sorry) says: "creep modulus (constant applied stress divided by total strain at a particular time)". I think there are different definitions all around. I assume Ansys calculates with its creep models always "pure creep strain". Right now I am working on a similar problem. I did not substract the elastic part out of the results of creep test results (from a reputable manufacturer) and now I am 90% sure that this was not correct - but the error is probably relatively small and I am on the safe side because I would have overestimated the total strain.
@@wjojo1 thanks for bringing in clarity here. My assumption was creep modulus was reported based on creep strain only. Ansys deals creep and elastic strain seperately. When creep modulus is calculated from total strain, then elastic strain need to be substracted. When elastic strain in small compared to creep strain over longer duration, the results are conservative as you pointed.
@@SanthoshKumar-ge9sq 👍👍 thanks for the nice discussion! What do you think about, if you want to be absolutely precise, you also must calculate the "true" creep strain and stress because also during the creep test you would have cross section reduction if it is a tensile test. Also in creep tests, the results refer to the initial cross section of the probe. But I think as creep calculations are usually done at relative small loads for the material, also here the difference or error is small (between the "engineering" and the "true" values). What is your opinion on that?
@@wjojo1 you are right. Care need to be taken in terms.of engeneering vs true strain too. All these are possible if you have access to test procedure and raw test data. Data sheets usually don't give this much details. If you want further discussion write to aerosanth@gmail.com.
I want to calculate the sound absorption coefficient (two microphone impedance test tube), from one side I have applied mass source (1 unit) and on another side, I have to apply radiation boundary condition/Perfectly matched layer. (at inlet only mass source ).
thank you!
Need help sir!!!!!! how can I contact you ??????
Thank you very much for your effort ! Very intuitive
Amazing video! Learned this previously but it really helped to reinforce the concepts with visual examples!!
thanks a lot,very informative lesson on how to handle non linear material ,solved my lot of queries and doubts regarding how to simulate plastics in ansys.
Dear Santosh, Can we install only Fortran Compiler Standalone or whole? Also, for Visual Studio do we need to install completely or only some standard tools are sufficient, reason for asking is because studio professional is very large (> 40 gb). Thank you very much for your detailed video
Sir can you pls share your mail id
Hello sir can you pls make video on acoustic absorption coefficient calculation for porous absorber using ansys acoustics
You already have to have a detailed material model to be able to do that, Delany-Bazley, JCA or similar. If so, then you can set up an impedance tube simulation. Basically, an open-closed tube with the absorber attached to the closed (rigid) end. As for boundary conditions; rigid wall bc on cylindrical surface and radiation boundary at inlet. Probe acoustic pressures at distance x1 and x2 away from the absorber. The absorption coefficient can then be calculated by the following expression: alpha = 1 - |R|^2, where R is the reflection coefficient given by: (H12 - e^(jk(x2-x1)) / e^(jk(x2-x1))* e^(2jk(x2-x1) H12 = P(x1)/P(x2) -> (complex fft’s) What you effectively measure is how large the incident wave is relative to the reflected wave.
Can I have the slides?
Hi, i always have: Equivalent creep strain ratio has exceeded the specified limit value. Since the time increment has reached the minimum value, the analysis is stopped.
Thanks. It was useful
Very informative video..I have one query..Can you please explain how did you define the hit point for the rotating force .
@Santhosh Kumar, thank you for this insightful video. Is there any way to find the accumulated creep strain?
Yes, through user defined results using expression=NLCREQ
Dont we have to use hyperelastic models for rubber?
Sir, from where I can get geometry??
Thank you for this informative video. Would it be possible to share the CAD file used in this model or if possible to share a link please? Thank you.
Sir, from where we can get sherlock license? Plz guide..
www.ansys.com/en-in/products/structures/ansys-sherlock
@@SanthoshKumar-ge9sq thank you sir
Hello, although I have made your code in order to learn. I do not know what I am missing in the code to be able to see that same illustration of the video, because I only observe the figure already cracked or with the dead elelents, there must be something in the code *DO that I can not perceive . Could you help me . I am new to programming
would you please make a complete set of video covering all acoustic topic from basic to advance level covering analysis in ansys as well for beginners , it ll be a great help
th-cam.com/video/VQ0I_qBOtL4/w-d-xo.html
Sir, Can i find creep constants without experimental data?