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Rahul Ponginan

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About Rahul Ponginan

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    Technical Manager - Academic Program

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  1. Cobra by Cetim is used in the industry to address complex bolted and screwed joints with critical safety and security issues.Major companies in the transportation industry use Cobra to analyze dynamic assemblies. The software is widely used across the gas, petroleum, agriculture, and construction industries for design and analysis of heavy duty assemblies.Cobra has unique experience in bolted joint analysis, review, verification, failure analysis, and dimensioning, with controlled torque pre-tightening, following VDI 2230 recommendation and extensions to standards NF E 25030-1, NF E 25030-2. Learn more here
  2. What's Possible with Altair One™ Explore further with dynamic, collaborative access to simulation and data analytics technology plus scalable HPC and cloud resources, all in one place. Provision scalable resources in the cloud or on-premises through a single pane of glass Run cloud versions of your favorite software Run simulation jobs in the cloud Learn More
  3. VABS by AnalySwift, is a general-purpose cross-sectional analysis tool for computing beam properties and recovering 3D stresses and strains of slender composite structures. The tool of choice for helicopter and wind turbine rotor blades, VABS is also a powerful tool for rigorous simulation of other slender composite structures, such as propellers, landing gear, wing sections, golf clubs, fishing rods, beams, poles, columns, rods, shafts, tubes, bridges, and many more. VABS can calculate ply-level details with the accuracy of 3D finite element analysis (FEA) in seconds on a typical laptop computer. VABS is capable of rigorously reducing an original 3D slender solid with complex cross-sections into a simple engineering beam model.With continuous development funded by the U.S. Army spanning over 30 years for performance and robustness, VABS' accuracy has been extensively verified by its developers and users. Learn More by clicking here
  4. Students are not given connect access, they should use Altair university resources for all purposes, Like the following learning resources, note that the student edition software download links are provided by email, there is no need to have connect access for this either, You can request for the free student edition following the procedure here - http://altairuniversity.com/hyperworks-2017-student-edition-order-now/ The HyperWorks Student guides / eBooks - https://altairuniversity.com/free-ebooks-2/ Altair's Academic Learning & Certification Program - https://certification.altairuniversity.com/ The full HyperWorks HTML documentation (part of your installation) provides a thorough, searchable resource to find detailed information about HyperWorks, including an extensive set of tutorials. An extensive collection of interactive training videos (with audio) covering the most essentials about interacting with the graphical user interface, basics of geometry cleanup, introduction in 2D meshing, analysis, debugging, topology optimization, and post processing (visit the learning library https://altairuniversity.com/learning-library/ for more information) Our YouTube channel - https://www.youtube.com/user/HyperWorksUniversity
  5. HOW TO RUN COMPOSE NOTEBOOK: Find the Compose_Jupyter.bat located at the Compose installation folder (default location for version 2019.4 is C:\Program Files\Altair\2019.4\Compose2019.4) and double click it. This operation will launch the Notebook. HOW TO OPEN AN EXISTING COMPOSE NOTEBOOK FILE (.ipynb): All the .ipynb files MUST be located in this location: \Documents\ComposeNotebooks Just click on File->Open Notebook and select the .ipynb to be opened. ABOUT THIS NOTEBOOK: This is a Compose Notebook version of the "System Dynamics and Controls Using Altair Compose" which can be downloaded at https://web.altair.com/system-dynamics-and-controls-using-altair-compose. Before running it the first time, copy&paste all the .ipynb files in the right directory, as explained in HOW TO OPEN AN EXISTING COMPOSE NOTEBOOK FILE (.ipynb). You can navigate to all chapters by opening CONTROL_SYSTEM_LIBRARY_1.ipynb. FURTHER INFORMATION: Compose NOtebook is availabe from Compose 2019.4. It gets installed automatically installing Compose2019.4
  6. Internal pressure generates tensile hoop stress for open cylinder and bi-axial in-plane tensile stress for closed cylinder. So it stabilizes the cylinder, it will not buckle. In ESAComp, internal pressure is defined as negative pressure. In the load specification, there is a check box for “pressure vessel” option. When checked, also axial load is set which mimics as the cylinder would be closed. You have to notice that when you perform buckling analysis with load vector {F}, that always -1 x {F} is also considered. Let’s say that {F} represents internal pressure. In this case, there is no stability issue. But the eigen value problem is also solved with -1 x {F}, which corresponds to external pressure and then you have solution. In this case the load factor is indicated with negative sign. If you want to consider the stabilization effect of the internal pressure in ESAComp, then you have to use geometrical nonlinear analysis. Under the ESAComp program “Document” -folder, you’ll find ESAComp Example Cases.pdf. There are plenty of cylindrical shell related case studies. All related ESAComp projects are under Demo-cases.
  7. Good morning Mrs/Mr, I downloaded ESAComp last week in order to study the buckling of simple structures during my internship with Arianegroup and have been struggling with one point. I started with very simples cases such as steel or aluminium cylinders (1 layer, no composite) and the results in buckling are coherent with my theoretical expectations. However, when I started to add an internal static pressure to my cylinder, the results went wrong (RF_1= 0,01 for example). I have no idea how to simulate the buckling of a cylinder with a static internal pressure. I used my previous cases of simple cylinders in steel or aluminium and filled in an external pressure in kPa in the tab for load parameters. Then, I ticked “Pressure Vessel” and ran the simulation. Should I put a sign minus in front of the pressure to indicate ESAComp the pressure is internal? I tried and the RF_1 becomes negative. Should I enter operation conditions ? I filled a min and max pressure (1 atm) and the results didn’t seem to change. Is the pressure inside the cylinder static? If not, how can I simulate the buckling of a cylinder with a static internal pressure? I didn’t find any tutorial or answer on the net nor on ESAComp examples. I hope you will be able to help me. Thank you for your answer.
  8. HI, You can request for the free Altair student edition here - https://studentedition.altair.com/
  9. are there special characters in the name in the save field - https://forum.altair.com/topic/38100-optistruct-solver-view-doesnt-show-up/ Or while running the file the .fem extension was not added in the save field perhaps? Or the full version HyperMesh was installed and activated with the student edition license so solvers wont be in there Or the files are in a read only folder, - https://forum.altair.com/topic/21562-analysis-optimization-dont-start/
  10. Have you considered simsolid, which can analyse complex geometries like body parts without any need for meshing?
  11. The objective of the forum is to have public technical discussions for the benefit of all users, private messaging is hence disabled.
  12. Users of Feko need to update to 2019.3 using the Update Tool in Feko launch bar to be able to use the new Component Library feature: You can do this by clicking on the “Check for updates” in Feko Launch bar. Once updated to 2019.3, launch the Component Library in CADFEKO from the menu toolbar:
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