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Questions tagged [glass]

35 questions
17
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Fracture patterns in tempered glass

While browsing a local news site, I stumbled upon this picture of a broken bus door. The glass was fractured due to a rock impact. As far as i know there are no heating elements on the window section in the picture. Now, what interests me is the…
shay s
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11
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Why doesn't stovetop glass crack from thermal shock?

I have a feeling that if my stovetop was made out of regular glass, it would have cracked from rapid cooling/heating a long time ago – especially if you consider accidental water spills. What kind of glass is able to withstand such abuse? (I am just…
Vasiliy Sharapov
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Glass bottle with a prolonged neck that continues into the inner space

Is it possible to create following two shapes from glass using currently known glass mass production techniques? Shape #1: bottle with a prolonged neck that continues into the inner space, like this (cross section): | | | | /| |\ /…
user1876484
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2
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1 answer

How can a small screen be projected on glass but still visible near 2cm from eyes?

In the smart glasses the images are projected on glass. But they are still clear to eyes. We usually can't see something clearly at such close distance. Then, how is the image projected from a small screen on the glass? Can someone explain how it…
Abrar
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1 answer

What does TIR stand for in Window Pane Fenestration?

When looking at glazings within various public databases I see the fields "tir" shown often. E.g as seen below: "glazing_data": { ... "tir_front": 0.0, "tir_back": null, ... } What does this field stand for?
Jebathon
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2
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3 answers

Feasability of glass gears?

I recently saw a video where a glassblower was making something, and one of the first steps was to push the wad of molten glass down into a shaper with a number of vertical spikes, such that the result vaguely resembled a gear. I am aware that gears…
flibwib
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Need Help to Remove Sway from Steel Post + Glass Panels

I have spanned ~15' with 2x 10mm tempered glass panels. They're connected in the middle with a 1.5" x 1.5" 16-gauge, 316 stainless steel post filled with concrete. This post has a 316 base welded on and this is securely bolted to structure below…
pennstump
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2
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Unsticking two glass elements fused by vacuum

I have an interlocking set of parts (1 and 2) which are used under vacuum. The last time I used it, the interface was wet with a mixture of water and ethanol. When the vacuum was removed, the two parts stayed firmly fused and no amount of force that…
KBriggs
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How would I put a barcode of other scannable code on a coffee cup?

I am interested in mass producing a reusable coffee cup (à la KeepCup) with a scannable id on it. Cup will be plastic or glass, ideally glass. ID code will need to survive being washed regularly. I was thinking it could be put on by whatever method…
Dilitante
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Alternative to high cost plexiglas and polycarbonate for large project

I am planning the construction of a large scale dodecahedron infinity mirror, and so far the largest cost by far are the glass (or similar clear, hard material) pentagons. Each panel would be screwed on to 3D printed frame parts, amounting to 6ft…
lakerice
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What is the ideal gap between two panes of glass for insulation

I have two panes of glass, about a 3/8" thick (.95 cm). Space efficiency and aesthetics ignored, how far apart should they be spaced to maximize heat insulation, assuming the gap contains regular air (and not Argon). I read that it's a balancing act…
gunfulker
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How to cut a thick glass block at home?

Due to pandemic, there are a lot of machine shops closed and delays in getting something custom made. I was wondering how to cut a triangular glass prism (~5cm hypotenuse) in the middle so I have two half slices? I was originally thinking of…
lionheart
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Mirror without glass?

I just noticed "mirror" was actually created by applying thin layer of metal on top of glass. In fact, the polished metal is exactly how mirror gets its properties - while glass itself is just for structure. From Wikipedia The most common…
gijoe
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Database for stiffness matrix?

I have searched everywhere for the stiffness matrix of GFRP, but there isn't a single paper or site that experimented the full matrix. Is there any sort of database for the stiffness matrix of many composite materials?
Andy_ye
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Seperating two glass pieces with a circuit board inside

I want to repair an outdoor lamp (see images below) however I can't get the glass container open. The methods I found on the internet are based on glue removers or based on heat but I'm not sure this will damage the print inside, as this is what I…
Maarten
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