# Latest **URL:** https://community.cdmhub.org/latest.md [Latest](https://community.cdmhub.org/latest.md) · [Categories](https://community.cdmhub.org/categories.md) · [Tags](https://community.cdmhub.org/tags.md) --- ## [Welcome to cdmHUB Community! 👋](https://community.cdmhub.org/t/welcome-to-cdmhub-community/5)
**Author:** [@system](https://community.cdmhub.org/u/system)\ **Replies:** 1\ **Last updated:** [September 19, 2025, 5:41pm UTC](https://community.cdmhub.org/t/welcome-to-cdmhub-community/5 "2025-09-19T17:41:04Z")
We are so glad you joined us. cdmHUB Community An AI-Human interactive forum uniting all stakeholders to explore composites, from core principles to AI-driven design, manufacturing, analysis, and applications. Connect,… --- ## [How to request to be an expert for CompositesAI](https://community.cdmhub.org/t/how-to-request-to-be-an-expert-for-compositesai/4668)
**Author:** [@Wenbin](https://community.cdmhub.org/u/Wenbin)\ **Replies:** 0\ **Last updated:** [November 3, 2026, 8:14pm UTC](https://community.cdmhub.org/t/how-to-request-to-be-an-expert-for-compositesai/4668 "2026-11-03T20:14:29Z")
After you logged in, click your name, click Settings Click Account, on the right of Request to become an Expert, click Show Fill in the information in the box. Once we received your information, we wi… --- ## [Post-doctoral fellowship at National Research Council Canada](https://community.cdmhub.org/t/post-doctoral-fellowship-at-national-research-council-canada/4667)
**Author:** [@GANG](https://community.cdmhub.org/u/GANG)\ **Replies:** 0\ **Last updated:** [November 1, 2026, 6:52pm UTC](https://community.cdmhub.org/t/post-doctoral-fellowship-at-national-research-council-canada/4667 "2026-11-01T18:52:41Z")
Please be advised that, a post-doctoral fellowship (PDF) position at Aerospace Research Center of National Research Council Canada is open. All qualified candidates are welcome to apply on the NRC website at https://recr… --- ## [Discrepancy Between SwiftComp 2D and 3D Homogenization for Thin Plain-Weave Composites](https://community.cdmhub.org/t/discrepancy-between-swiftcomp-2d-and-3d-homogenization-for-thin-plain-weave-composites/4666)
**Author:** [@myapa2](https://community.cdmhub.org/u/myapa2)\ **Replies:** 14\ **Last updated:** [October 22, 2026, 8:25pm UTC](https://community.cdmhub.org/t/discrepancy-between-swiftcomp-2d-and-3d-homogenization-for-thin-plain-weave-composites/4666 "2026-10-22T20:25:41Z")
Hello everyone, I’ve been investigating a discrepancy between the in-plane Young’s modulus (E\_1) obtained from SwiftComp 2D (Kirchhoff–Love plate) and 3D homogenization. For a single-ply plain-weave laminate, the resul… --- ## [Creating a Skill for an AI Agent: Introduction](https://community.cdmhub.org/t/creating-a-skill-for-an-ai-agent-introduction/4656)
**Author:** [@su.tian.22](https://community.cdmhub.org/u/su.tian.22)\ **Replies:** 4\ **Last updated:** [October 9, 2026, 5:59pm UTC](https://community.cdmhub.org/t/creating-a-skill-for-an-ai-agent-introduction/4656 "2026-10-09T17:59:34Z")
What is a skill? A skill is a small, reusable package that teaches an AI agent how to perform a specific task consistently. It usually combines focused instructions with optional scripts, templates, and reference materia… --- ## [CompositesAI workshop on SES 2026](https://community.cdmhub.org/t/compositesai-workshop-on-ses-2026/4665)
**Author:** [@Wenbin](https://community.cdmhub.org/u/Wenbin)\ **Replies:** 0\ **Last updated:** [October 6, 2026, 10:07pm UTC](https://community.cdmhub.org/t/compositesai-workshop-on-ses-2026/4665 "2026-10-06T22:07:10Z")
We will have a workshop on Society of Engineering Science Annual Technical Meeting at Purdue. If you are attending SES 2026 in person, you are welcome to attend the workshop on CompositesAI scheduled on Sunday (10/11) 4… --- ## [One homogenization pipeline for microstructures from Abaqus/CAE, Gmsh, microgen and TexGen](https://community.cdmhub.org/t/one-homogenization-pipeline-for-microstructures-from-abaqus-cae-gmsh-microgen-and-texgen/4662)
**Author:** [@su.tian.22](https://community.cdmhub.org/u/su.tian.22)\ **Replies:** 0\ **Last updated:** [October 2, 2026, 5:29pm UTC](https://community.cdmhub.org/t/one-homogenization-pipeline-for-microstructures-from-abaqus-cae-gmsh-microgen-and-texgen/4662 "2026-10-02T17:29:57Z")
Posted a new example on homogenizing microstructures that come from different modeling tools with a single sgio + SwiftComp pipeline, and comparing their elastic anisotropy on one scale. What it covers: Four microstru… --- ## ["Continue with Google" loops back to the login page right after sign-up (Firefox)](https://community.cdmhub.org/t/continue-with-google-loops-back-to-the-login-page-right-after-sign-up-firefox/4659)
**Author:** [@GideonWiersma](https://community.cdmhub.org/u/GideonWiersma)\ **Replies:** 1\ **Last updated:** [September 21, 2026, 6:50pm UTC](https://community.cdmhub.org/t/continue-with-google-loops-back-to-the-login-page-right-after-sign-up-firefox/4659 "2026-09-21T18:50:38Z")
I created an account in Firefox using “Continue with Google,” but that didn’t log me in. When I then tried “Continue with Google” again, the Google login completed and a “you are logged in” pop-up appeared in the top rig… --- ## [CompositesAI workshop on 2026 ASC Annual Technical Conference](https://community.cdmhub.org/t/compositesai-workshop-on-2026-asc-annual-technical-conference/4655)
**Author:** [@Wenbin](https://community.cdmhub.org/u/Wenbin)\ **Replies:** 0\ **Last updated:** [September 14, 2026, 6:44pm UTC](https://community.cdmhub.org/t/compositesai-workshop-on-2026-asc-annual-technical-conference/4655 "2026-09-14T18:44:40Z")
We will have a workshop on ASC Annual Technical Conference. If you are attending this year’s ASC conference, you are welcome to attend the workshop on CompositesAI scheduled on Tuesday 9/29 10:15-11:55 (Old Madison 3312… --- ## [Deletion of excessively distorted elements in ABAQUS](https://community.cdmhub.org/t/deletion-of-excessively-distorted-elements-in-abaqus/4653)
**Author:** [@Ahmed](https://community.cdmhub.org/u/Ahmed)\ **Replies:** 0\ **Last updated:** [September 11, 2026, 10:04am UTC](https://community.cdmhub.org/t/deletion-of-excessively-distorted-elements-in-abaqus/4653 "2026-09-11T10:04:18Z")
I am using ABAQUS to model the drop-weight impact of a sandwich structure made of CFRP/cohesive/crushable foam/cohesive/CFRP. The explicit solver aborts after a while due to excessive distortion of foam elements. I tried… --- ## [SwiftComp GUI results for woven composites](https://community.cdmhub.org/t/swiftcomp-gui-results-for-woven-composites/4652)
**Author:** [@myapa2](https://community.cdmhub.org/u/myapa2)\ **Replies:** 0\ **Last updated:** [September 10, 2026, 11:41pm UTC](https://community.cdmhub.org/t/swiftcomp-gui-results-for-woven-composites/4652 "2026-09-10T23:41:13Z")
Hello, I have been trying to use SwiftComp to evaluate the mechanical behavior of woven composite materials. I am creating the geometry from TexGen and generating a voxel mesh. I am importing the generated input file t… --- ## [Remote Connection](https://community.cdmhub.org/t/remote-connection/4651)
**Author:** [@SD.Jacob](https://community.cdmhub.org/u/SD.Jacob)\ **Replies:** 1\ **Last updated:** [September 9, 2026, 10:57am UTC](https://community.cdmhub.org/t/remote-connection/4651 "2026-09-09T10:57:10Z")
Hi team, I am trying to remotely connect the network PC using the credential provided by Prof. Yu. Please refer below the details VPN: webvpn2.purdue.edu (connected). However, the remote access is not successful with … --- ## [Introduce yourself](https://community.cdmhub.org/t/introduce-yourself/72)
**Author:** [@Wenbin](https://community.cdmhub.org/u/Wenbin)\ **Replies:** 116\ **Last updated:** [September 2, 2026, 6:59pm UTC](https://community.cdmhub.org/t/introduce-yourself/72 "2026-09-02T18:59:25Z")
All, To help us know each other better, I would like to encourage new members to introduce themselves through this thread. Your post can be as simple as I am Wenbin Yu from Purdue University, you can refer to Wenbin Y… --- ## [CompositesAI is now available on your Phone!](https://community.cdmhub.org/t/compositesai-is-now-available-on-your-phone/4646)
**Author:** [@Wenbin](https://community.cdmhub.org/u/Wenbin)\ **Replies:** 0\ **Last updated:** [August 5, 2026, 6:28pm UTC](https://community.cdmhub.org/t/compositesai-is-now-available-on-your-phone/4646 "2026-08-05T18:28:41Z")
We are excited to announce that the CompositesAI is now available as an App on both iOS and Android. With CompositesAI, an AI-powered composites expert system is now at your fingertips—and in your pocket. CompositesAI … --- ## [ Is VAPAS Reliable for Free-Edge Stress Prediction in Laminates?](https://community.cdmhub.org/t/is-vapas-reliable-for-free-edge-stress-prediction-in-laminates/4632)
**Author:** [@Huangyujie](https://community.cdmhub.org/u/Huangyujie)\ **Replies:** 14\ **Last updated:** [August 2, 2026, 10:06am UTC](https://community.cdmhub.org/t/is-vapas-reliable-for-free-edge-stress-prediction-in-laminates/4632 "2026-08-02T10:06:20Z")
VAPAS shows excellent accuracy for interior solutions like cylindrical bending, but are its interlaminar stress predictions near free edges reliable? Some argue that VAPAS is fundamentally an “interior solution” theory, … --- ## [Choosing the Right Carbon Fiber Tube Size – Why Φ20mm Works](https://community.cdmhub.org/t/choosing-the-right-carbon-fiber-tube-size-why-20mm-works/4634)
**Author:** [@GBTECH](https://community.cdmhub.org/u/GBTECH)\ **Replies:** 0\ **Last updated:** [July 30, 2026, 11:15am UTC](https://community.cdmhub.org/t/choosing-the-right-carbon-fiber-tube-size-why-20mm-works/4634 "2026-07-30T11:15:15Z")
When selecting carbon fiber tubes for lightweight structures, the Φ20mm outer diameter is a popular choice. It offers an excellent balance of strength, stiffness, and weight, making it ideal for drone arms, robotic linka… --- ## [Batch cross-sectional analysis of 1600+ airfoils with PreVABS + VABS](https://community.cdmhub.org/t/batch-cross-sectional-analysis-of-1600-airfoils-with-prevabs-vabs/4624)
**Author:** [@su.tian.22](https://community.cdmhub.org/u/su.tian.22)\ **Replies:** 4\ **Last updated:** [July 20, 2026, 5:28pm UTC](https://community.cdmhub.org/t/batch-cross-sectional-analysis-of-1600-airfoils-with-prevabs-vabs/4624 "2026-07-20T17:28:42Z")
A simple example that walks through running PreVABS/VABS in batch mode to compute Timoshenko beam properties across a large set of airfoil cross-sections — useful if you’re doing parametric or trade studies on composite … --- ## [PreVABS 2.1 is Now Available](https://community.cdmhub.org/t/prevabs-2-1-is-now-available/4623)
**Author:** [@su.tian.22](https://community.cdmhub.org/u/su.tian.22)\ **Replies:** 1\ **Last updated:** [July 7, 2026, 4:57pm UTC](https://community.cdmhub.org/t/prevabs-2-1-is-now-available/4623 "2026-07-07T16:57:41Z")
An update focused on more flexible modeling, more robust geometry, and easier configuration. Highlights: More robust curve offsetting with a new Clipper2-based backend Redesigned layup definition: position on the basel… --- ## [Abaqus shell modelling convergence issues](https://community.cdmhub.org/t/abaqus-shell-modelling-convergence-issues/4617)
**Author:** [@denism](https://community.cdmhub.org/u/denism)\ **Replies:** 12\ **Last updated:** [June 25, 2026, 4:59pm UTC](https://community.cdmhub.org/t/abaqus-shell-modelling-convergence-issues/4617 "2026-06-25T16:59:03Z")
Dear community, I have encountered an issue when modeling a cylindrical shell with S4R elements in Abaqus. The model is shown below (the platform does not allow me to attach the .inp). Model description: Cylindr… --- ## [CompositesAI at 2026 IACMI Members Meeting](https://community.cdmhub.org/t/compositesai-at-2026-iacmi-members-meeting/4621)
**Author:** [@Wenbin](https://community.cdmhub.org/u/Wenbin)\ **Replies:** 0\ **Last updated:** [June 24, 2026, 9:36pm UTC](https://community.cdmhub.org/t/compositesai-at-2026-iacmi-members-meeting/4621 "2026-06-24T21:36:58Z")
I had the privilege participating 2026 IACMI Members Meeting in Denver, Colorado. I served as one panelist for The Reality of AI and Smart Manufacturing, and also gave a keynote during the lunch. Both are well received. … --- ## [PreVABS example: I-beam](https://community.cdmhub.org/t/prevabs-example-i-beam/4620)
**Author:** [@robh2020](https://community.cdmhub.org/u/robh2020)\ **Replies:** 1\ **Last updated:** [June 19, 2026, 8:16pm UTC](https://community.cdmhub.org/t/prevabs-example-i-beam/4620 "2026-06-19T20:16:16Z")
Regarding the I-beam example, the problem statement provides some conflicting details. In the overview, height, defined as h = 3.0 m, applies to the outside of the upper and lower flanges, as shown in Figure 25. Baseline… --- ## [PreVABS Tutorial \ syntax not compatible with PreVABS 1.6.0](https://community.cdmhub.org/t/prevabs-tutorial-include-syntax-not-compatible-with-prevabs-1-6-0/4585)
**Author:** [@robh2020](https://community.cdmhub.org/u/robh2020)\ **Replies:** 1\ **Last updated:** [June 19, 2026, 8:15pm UTC](https://community.cdmhub.org/t/prevabs-tutorial-include-syntax-not-compatible-with-prevabs-1-6-0/4585 "2026-06-19T20:15:07Z")
I’m trying to run the PreVABS tutorial: https://wenbinyugroup.github.io/ivabs/ref/prevabs/contents/tutorial.html I prepared the (4) input files per instructions: baselines.xml box.xml layups.xml MaterialDB.x… --- ## [Advancing Composite Materials Testing with ARAMIS 3D Digital Image Correlation – Purdue Area Visit June 11](https://community.cdmhub.org/t/advancing-composite-materials-testing-with-aramis-3d-digital-image-correlation-purdue-area-visit-june-11/4614)
**Author:** [@jacobg](https://community.cdmhub.org/u/jacobg)\ **Replies:** 0\ **Last updated:** [June 3, 2026, 2:53pm UTC](https://community.cdmhub.org/t/advancing-composite-materials-testing-with-aramis-3d-digital-image-correlation-purdue-area-visit-june-11/4614 "2026-06-03T14:53:13Z")
Hello All, I wanted to reach out and let everyone know that Trilion will be in the area on Thursday, June 11, and we’d welcome the opportunity to connect with researchers, engineers, and students working in composite ma… --- ## [\[Paper\] The Last Human-Written Paper: Agent-Native Research Artifacts](https://community.cdmhub.org/t/paper-the-last-human-written-paper-agent-native-research-artifacts/4613)
**Author:** [@su.tian.22](https://community.cdmhub.org/u/su.tian.22)\ **Replies:** 0\ **Last updated:** [May 29, 2026, 9:46pm UTC](https://community.cdmhub.org/t/paper-the-last-human-written-paper-agent-native-research-artifacts/4613 "2026-05-29T21:46:18Z")
ABSTRACT Scientific publication compresses a branching, iterative research process into a linear narrative, discarding the majority of what was discovered along the way. This compilation imposes two structural costs: a S… --- ## [CompositesAI talk to Composites Energy Frontier Research Center](https://community.cdmhub.org/t/compositesai-talk-to-composites-energy-frontier-research-center/4612)
**Author:** [@Wenbin](https://community.cdmhub.org/u/Wenbin)\ **Replies:** 0\ **Last updated:** [May 18, 2026, 2:18pm UTC](https://community.cdmhub.org/t/compositesai-talk-to-composites-energy-frontier-research-center/4612 "2026-05-18T14:18:52Z")
All, I will give my CompositesAI talk to Composites Energy Frontier Research Center LinkedIn Login, Sign in | LinkedIn. You are welcome to attend. --- ## [PreVABS fiber orientation definition](https://community.cdmhub.org/t/prevabs-fiber-orientation-definition/4611)
**Author:** [@robh2020](https://community.cdmhub.org/u/robh2020)\ **Replies:** 3\ **Last updated:** [May 14, 2026, 3:13pm UTC](https://community.cdmhub.org/t/prevabs-fiber-orientation-definition/4611 "2026-05-14T15:13:29Z")
What is the correct fiber orientation for the PreVABS 2.0 Box Beam example, +15 or -15 degrees? Text states +15. XML file also shows +15. But Table 11 indicates -15 degrees. Is this a discrepancy or does it relate to the… --- ## [TRI6 elements written with midside node in N4 slot, causing VABS Jacobian error](https://community.cdmhub.org/t/tri6-elements-written-with-midside-node-in-n4-slot-causing-vabs-jacobian-error/4587)
**Author:** [@robh2020](https://community.cdmhub.org/u/robh2020)\ **Replies:** 2\ **Last updated:** [May 8, 2026, 10:32pm UTC](https://community.cdmhub.org/t/tri6-elements-written-with-midside-node-in-n4-slot-causing-vabs-jacobian-error/4587 "2026-05-08T22:32:10Z")
PreVABS 1.6.0 · .sg output Description For meshes containing higher-order triangles (TRI6), PreVABS writes the first midside node into the N4 column instead of N5. Per VABS manual, N4 must be zero for triangles. VABS … --- ## [PreVABS 2.0 MaterialDB.xml Bug](https://community.cdmhub.org/t/prevabs-2-0-materialdb-xml-bug/4605)
**Author:** [@danafrye18](https://community.cdmhub.org/u/danafrye18)\ **Replies:** 1\ **Last updated:** [May 6, 2026, 8:57pm UTC](https://community.cdmhub.org/t/prevabs-2-0-materialdb-xml-bug/4605 "2026-05-06T20:57:46Z")
FYI - I believe there is a small issue with the prevabs 2.0 MaterialDB.xml file in line 1498. When I ran a test case I got the error: \[error\] homogenization failed: Invalid numeric value ‘e3’ in / When I changed the … --- ## [PreVABS example discrepancy - Airfoil (MH-104)](https://community.cdmhub.org/t/prevabs-example-discrepancy-airfoil-mh-104/4603)
**Author:** [@robh2020](https://community.cdmhub.org/u/robh2020)\ **Replies:** 2\ **Last updated:** [May 6, 2026, 4:41pm UTC](https://community.cdmhub.org/t/prevabs-example-discrepancy-airfoil-mh-104/4603 "2026-05-06T16:41:01Z")
Please correct discrepancies in the subject PreVABS example. The example write-up says, “There are two webs, whose right boundaries are at the 20% and 50% location of the chord”. But, it also refers to \[CHEN2010\] which … --- ## [PreVABS 2.0 is Now Available](https://community.cdmhub.org/t/prevabs-2-0-is-now-available/4597)
**Author:** [@su.tian.22](https://community.cdmhub.org/u/su.tian.22)\ **Replies:** 4\ **Last updated:** [May 6, 2026, 2:20am UTC](https://community.cdmhub.org/t/prevabs-2-0-is-now-available/4597 "2026-05-06T02:20:16Z")
A major update aimed at improving stability and user experience. v2.0.1 Fixed a value issue in the global material database Fixed some issues in the documentation v2.0.0 Highlights: Improved geometry computation ro… [Next page](https://community.cdmhub.org/latest.md?page=1)