OpenCourant

Announcing OpenCourant, the community continuation of OpenRadioss

Today, Siemens discontinued the OpenRadioss project. The openradioss.org website now redirects to a product transition page, and the OpenRadioss GitHub repository — with its full history of community contributions since Altair open-sourced the Radioss solver in 2022 — returns a 404. No public archive was left behind.

OpenRadioss was something rare: an industry-proven, production-grade explicit finite element solver for crash, blast, and impact analysis, available to everyone under the GNU AGPL v3. Researchers, engineers, and developers around the world built on it for four years.

That work is not lost.

OpenCourant

Today the Rocky Enterprise Software Foundation is launching OpenCourant, a community fork continuing from the last available OpenRadioss open-source code base. The repository is live now:

github.com/OpenCourant/OpenCourant

The license remains the GNU AGPL v3, and the project will be governed in the open, under a vendor-neutral foundation. The name honors the Courant–Friedrichs–Lewy condition — the stability criterion underpinning explicit dynamics solvers like this one.

We need the community back

It has been only hours since the shutdown, so there is not much to announce beyond this: the code is safe, and the lights are on. What matters now is reassembling the people.

If you were part of the OpenRadioss community in any capacity — contributor, maintainer, researcher, industrial user, student — please reconnect:

We especially want to hear from former OpenRadioss maintainers and community leaders. The goal is for this project’s technical direction and governance to be shaped by the people who know it best.

More news soon. For now: spread the word, join the channel, and say hello.