On the Mechanics of Wet Sand

Sand is a critical component of many built environments. As most of us learn (via sand castle), adding just the right amount of water allows sand to be quite strong. But with too little water โ€” or too much โ€” sand is prone to collapse. For those of us outside the construction industry, weโ€™re most likely to run into this problem on the beach while digging holes in the sand. In this Practical Engineering video, Grady explains the forces that stabilize and destabilize piled sand and where the dangers of excavation lie. (Video and image credit: Practical Engineering)

#civilEngineering #fluidDynamics #geophysics #granularMaterial #granularMaterial_ #infrastructure #physics #science #shear

SciTech Chronicles. . . . . . . . .Mar 6th, 2025

  We share the world with tiny dinosaurs that sing when the sun comes out. Vol II No 59 400 links Curated Transparent Stretchable Substrate'...

How to remove/demold a part from a fragile part. (Hint: You can create shear in more than one way, and it may be better than creating a peeling action with hammer and chisel.)

The blue Styrofoam that served as the form will be destroyed as it's removed from the fiberglass wingtip weel, but it's a one-off form/mold that lacked any taper.

(This is a follow up to https://universeodon.com/@KrajciTom/114079474882668327 )

#avgeek #aviation #ElectricAircraft #ExperimentalAviation #homebuilt
#Glider #DIY #Wing #Epoxy #Fiberglass #Composite #Shear #Peel

TomKrajci ๐Ÿ‡บ๐Ÿ‡ฆ ๐Ÿณ๏ธโ€๐ŸŒˆ ๐Ÿณ๏ธโ€โšง๏ธ (@KrajciTom@universeodon.com)

Attached: 3 images Making a custom wingtip wheel for my glider's right wing. The bottom of the wingtip was covered with clear packing tape, then lightly waxed. Hot glue temporarily attached the blue Styrofoam mold/form, which also contains the 60mm diameter roller blade wheel. The part is made from seven plies of 7725 weave fiberglass that will be cut into a triangular shape after wetting with epoxy. No vacuum bag, so this is a hand lay up. I had to use some small pieces of metal to coax the fiberglass to stay in the correct place. The garage will be heated overnight so that the part cures, then some tugging and a rubber mallet should separate the part. #avgeek #aviation #ElectricAircraft #ExperimentalAviation #homebuilt #Glider #DIY #Wing #Epoxy #Fiberglass #Composite

Universeodon Social Media

I'm back! Been a bit busy with life, here's a cute outfit that I found somewhere on the internet

#cute #outfit #shear #NSFW #sketch #art #boobs #sexy

In depth look at my shear geometry node in blender

https://makertube.net/videos/watch/f7bb3741-5fb8-487d-b857-b72bbcbff434

In depth look at my shear geometry node in blender

PeerTube
shear - geometry nodes in blender

PeerTube

RIP Barbara Oberg

Documentary editors and scholars of Early America mourn the loss of Barbara Oberg, who passed away peacefully in hospice care on September 14.

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#histodons #history #SHEAR

Rhonda Shear

Rhonda was a pantyhose goddess of the highest order.

Girl Selfie
Call for Participants: Fifth Annual SHEAR Biography Workshop

Visit the post for more.

The Panorama