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<p>I like to ask if it's possible for Ansys to share how exactly does workbench LSDYNA writes out certain keywords and how I can create my own version of writing out input deck. For example, I like to create an object that writes out the *node keyword based on a set of (x,y,z) coordinate based on a coordinate system that I created. This *Node wouldn't be a real node in the GUI but it will show up as a node in LSPP because *NODE exists. </p><p>there are many other examples I like to do myself. </p><p>I am considering writing my own ACT extension to change the behavior of workbench LSDYNA but I would really like to have a place to start, as opposed to starting with nothing. </p><p>Would it be possible to share something?</p>
<p>Hello,</p><p>I'm developing a FEM model to simulate the landing of a seaplane on water.</p><p>I'm using the S-ALE method with a 2D beam model of the hull section. I need in output a plot with the pressure on different elements in time.</p><p>I've used DATABASE_FSI but if I define multiple elements to plot, when I select in output the ASCII files i get a strange "bug": just half of the requested plot are created and the others are equal to zero. I get multiple plots with the same values but they should not be, the elements selected in pre processing are different and the results are wrong because the pressure are not real</p><p></p><p>Is possible to get the different plots in a single processing or I have to define one by one?</p><p> </p>
<p>We are performing ultra-high-speed impact analysis using Autodyn's SPH method.<br>The projectile's impact velocity is 7 km/s, and typically, the impacted object liquefies upon impact.</p><p>We are performing ultra-high-speed impact analysis using Autodyn's SPH method.</p><p>The projectile's impact velocity is 7 km/s, and typically, the impacted object liquefies upon impact. We would like to perform a simulation using a resin material as the impacted object. When I perform a collision analysis using the polyethylene material included in Autodyn by default, the polyethylene scatters, which differs from the actual phenomenon. In reality, due to the material’s property of melting at high temperatures (viscosity), material remains around the impact area of the impacted object. My question is: Please tell me how to set the material’s viscosity in Autodyn.</p><p></p>
<p data-start="69" data-end="83">Hi everyone,</p><p data-start="85" data-end="262">I am currently simulating the crushing behaviour of a Miura plate using LS-DYNA Workbench and have encountered an issue while trying to extract the force–displacement response.</p><p data-start="264" data-end="548">In my setup, the plate is supported on a rigid box, while a rigid top platen (crosshead) is prescribed a displacement in the transverse direction. The bottom box is fully constrained using a rigid body definition, and the top platen is only allowed to move in the loading direction.</p><p data-start="550" data-end="859">My goal is to obtain the force exerted by the top platen on the Miura plate so that I can plot a force versus displacement curve. However, when I attempt to extract this using the “reaction force” or “external force” options in Workbench, I receive an error message stating: <em data-start="825" data-end="857">“Extraction of result failed.”</p><p data-start="861" data-end="991">I would appreciate any guidance on how to correctly obtain the force output for this type of displacement-controlled simulation.</p><p data-start="993" data-end="1014" data-is-last-node="" data-is-only-node="">Thank you in advance!</p><p> </p>
<p>Hi everyone,<br>I am a newbie, i really need help in meshing the armor plate and bullet in LS-DYNA.<br>Armor plate consists of 25 Layers with thickness of 0.2mm-0.3mm.<br>I imported all the geometry from CATIA into LS-DYNA, now what should i do?<br>Which meshing tool should i use?<br></p>
<p>Hello everyone.<br>I have two cylinders nested inside each other. The inner cylinder (red) is 300 mm in diameter, and the outer (black) is 2 mm thick.<br>Both cylinders are made of SPH particles.<br>How can I configure the outer cylinder to have a single layer of the specified size, for example, a 2 mm thick cylinder? The system won't let me build particles on the outer cylinder larger than 0.05 mm, resulting in a total particle count of over 3 million.<br>Thank you.</p><p> </p><p></p>
<p>Hello everyone.<br>I'm simulating a calculation with rubber and cord inside.<br>Everything was working fine before, but now the calculation stops with an error and terminates.<br>I'm using a 20-core MPP.<br>I have a fairly powerful processor and 512 GB of DDR.<br>Why is this happening and how can I fix it? Thank you.</p><p></p><p></p>
<p>Hello everyone.<br>I'm simulating rubber inflation under pressure. I'm also using mass scale.<br>In my calculations, I see that the mesh on the rubber end is severely distorted. Why? How can I fix this? There's no pressure on the end.</p><p></p><p></p>
<p>Hello,</p><p>I have created a bumper and a guard-rail. (I have used similar KEYWORDS like in the Yaris test case.)</p><p>In the time step, where the bumper hits the rail. Big, fast growing cells are produced at the bumper (see red circle).</p><p>Is it weak convergence? What can I do?</p><p>My best wishes & Thank you!</p><p>Frank</p><p></p>
<p>I like to ask if it's possible for Ansys to share how exactly does workbench LSDYNA writes out certain keywords and how I can create my own version of writing out input deck. For example, I like to create an object that writes out the *node keyword based on a set of (x,y,z) coordinate based on a coordinate system that I created. This *Node wouldn't be a real node in the GUI but it will show up as a node in LSPP because *NODE exists. </p><p>there are many other examples I like to do myself. </p><p>I am considering writing my own ACT extension to change the behavior of workbench LSDYNA but I would really like to have a place to start, as opposed to starting with nothing. </p><p>Would it be possible to share something?</p>
<p>Hello,</p><p>I'm developing a FEM model to simulate the landing of a seaplane on water.</p><p>I'm using the S-ALE method with a 2D beam model of the hull section. I need in output a plot with the pressure on different elements in time.</p><p>I've used DATABASE_FSI but if I define multiple elements to plot, when I select in output the ASCII files i get a strange "bug": just half of the requested plot are created and the others are equal to zero. I get multiple plots with the same values but they should not be, the elements selected in pre processing are different and the results are wrong because the pressure are not real</p><p></p><p>Is possible to get the different plots in a single processing or I have to define one by one?</p><p> </p>
<p>We are performing ultra-high-speed impact analysis using Autodyn's SPH method.<br>The projectile's impact velocity is 7 km/s, and typically, the impacted object liquefies upon impact.</p><p>We are performing ultra-high-speed impact analysis using Autodyn's SPH method.</p><p>The projectile's impact velocity is 7 km/s, and typically, the impacted object liquefies upon impact. We would like to perform a simulation using a resin material as the impacted object. When I perform a collision analysis using the polyethylene material included in Autodyn by default, the polyethylene scatters, which differs from the actual phenomenon. In reality, due to the material’s property of melting at high temperatures (viscosity), material remains around the impact area of the impacted object. My question is: Please tell me how to set the material’s viscosity in Autodyn.</p><p></p>
<p data-start="69" data-end="83">Hi everyone,</p><p data-start="85" data-end="262">I am currently simulating the crushing behaviour of a Miura plate using LS-DYNA Workbench and have encountered an issue while trying to extract the force–displacement response.</p><p data-start="264" data-end="548">In my setup, the plate is supported on a rigid box, while a rigid top platen (crosshead) is prescribed a displacement in the transverse direction. The bottom box is fully constrained using a rigid body definition, and the top platen is only allowed to move in the loading direction.</p><p data-start="550" data-end="859">My goal is to obtain the force exerted by the top platen on the Miura plate so that I can plot a force versus displacement curve. However, when I attempt to extract this using the “reaction force” or “external force” options in Workbench, I receive an error message stating: <em data-start="825" data-end="857">“Extraction of result failed.”</p><p data-start="861" data-end="991">I would appreciate any guidance on how to correctly obtain the force output for this type of displacement-controlled simulation.</p><p data-start="993" data-end="1014" data-is-last-node="" data-is-only-node="">Thank you in advance!</p><p> </p>
<p>Hi everyone,<br>I am a newbie, i really need help in meshing the armor plate and bullet in LS-DYNA.<br>Armor plate consists of 25 Layers with thickness of 0.2mm-0.3mm.<br>I imported all the geometry from CATIA into LS-DYNA, now what should i do?<br>Which meshing tool should i use?<br></p>
<p>Hello everyone.<br>I have two cylinders nested inside each other. The inner cylinder (red) is 300 mm in diameter, and the outer (black) is 2 mm thick.<br>Both cylinders are made of SPH particles.<br>How can I configure the outer cylinder to have a single layer of the specified size, for example, a 2 mm thick cylinder? The system won't let me build particles on the outer cylinder larger than 0.05 mm, resulting in a total particle count of over 3 million.<br>Thank you.</p><p> </p><p></p>
<p>Hello everyone.<br>I'm simulating a calculation with rubber and cord inside.<br>Everything was working fine before, but now the calculation stops with an error and terminates.<br>I'm using a 20-core MPP.<br>I have a fairly powerful processor and 512 GB of DDR.<br>Why is this happening and how can I fix it? Thank you.</p><p></p><p></p>
<p>Hello everyone.<br>I'm simulating rubber inflation under pressure. I'm also using mass scale.<br>In my calculations, I see that the mesh on the rubber end is severely distorted. Why? How can I fix this? There's no pressure on the end.</p><p></p><p></p>
<p>Hello,</p><p>I have created a bumper and a guard-rail. (I have used similar KEYWORDS like in the Yaris test case.)</p><p>In the time step, where the bumper hits the rail. Big, fast growing cells are produced at the bumper (see red circle).</p><p>Is it weak convergence? What can I do?</p><p>My best wishes & Thank you!</p><p>Frank</p><p></p>
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