July 16

Author

Jarett Gross
July 16, 2024

Lot’s of links to share today because there is so much awesome stuff going on! Not only did I just release the video from the oldest permitted build in the world by the legendary Andrey Rudenko, I also released a podcast with him where he discusses how his early partner was kidnapped and disappeared, never to be seen again in a likely assassination. On top of that there are 2 research papers you should read linked below, 2 new pieces of humanoid robot news and one entertaining video to cleanse your brain at the end.

Here’s the tour of the famous Backyard Castle which just turned 10 years old.

For the epic story of the companies founding and disappearance of a key early partner, check out the full podcast for the never before heard story.

Here is a research paper which could lead to a structural recognition of 3D printed circular column compressive strength available for free right now to everyone, along with the next research paper I am linking below.

A Compressive Load Bearing Analysis of 3D-Printed Circular Elements

Large-scale construction 3D printing is a promising platform technology that can be leveraged to fabricate structural elements such as columns, piers, pipes, and culverts. In this study, the axial compression and split tensile performance of 3D-printed steel-fiber-reinforced circular elements fabricated with different configurations (hollow, hybrid, mold-cast, and fully 3D-printed) is evaluated. This study further investigates the performance of multi-material circular hybrid elements (3D-printed shells with different backfilled core materials) in an attempt to assess their suitability as a new construction paradigm. The experimental results revealed that the fully 3D-printed steel-fiber-reinforced circular elements exhibited a higher load capacity (up to 36%) and a distinct crack pattern compared to the other configurations. The void ratio of circular elements has varying effects on its axial load capacity depending on the printing material and significantly influences its splitting tensile load capacity. Furthermore, the compatibility between the 3D-printed shell and the cast-in-place core is identified as an influential factor in the structural performance of the hybrid elements. The results suggest a promising construction approach where low-cement material can be utilized as infill material for a cost-effective 3D-printed permanent formwork, offering a viable solution for specific infrastructure development applications.

www.mdpi.com/2075-5309/14/7/2170

Lot’s of companies are interested in printing on space, regolith is the term for local soil outside earth, for example moon regolith or mars regolith. They are experimenting with printing these materials because it is so expensive to ship mass in space, there is a ‘massive’ benefit to local material procurement.

3D printed sulfur-regolith concrete performance evaluation for waterless extraterrestrial robotic construction

By leveraging the capabilities of construction 3D printing, building structures in harsh extraterrestrial environments is conceivable. Sulfur concrete…

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Here is an update on the $1,000 open source humanoid robot. Projects like this never receive enough attention!

IHMC and Boardwalk robotics are collaborating on a humanoid robot you can see achieving impressive teleoperation with the person in the back controlling the robot playing ping pong. This is how you train them up to full autonomy.

Last thing for today, you’ve heard of the trolley problem? I bet you’ve never seen this solution!