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Questions tagged [glass]

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Is It Possible To Calculate The Internal Pressure Which A Sealed Glass Vessel Can Support, By Creating A Relative Vacuum Outside The Vessel?

Questions are bold with context surrounding them. I am not an engineer. Well, I'm a computer scientist but I don't do this. I do, however, brew kombucha and am looking to scale up. I have a new ...
Matthew Jendrasiak's user avatar
1 vote
1 answer
44 views

150W laser cutting various materials

I have a few materials that I would like to get cut (in precise shapes that I cant do on a saw), these are Quartz glass (1mm thick) alumina wafer (1mm thick) (AL2O3) copper coated alumina (2mm thick) ...
user1402154's user avatar
0 votes
0 answers
13 views

How can I calculate the thermal stress applied to a window by an ND gel?

I work for a company that installs film studios. Our client have insisted that they retain the floor-to-ceiling windows in the studio space, to use as an alternative background to film against. For ...
griz's user avatar
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0 votes
0 answers
47 views

Is glass better than PMMA or PC at anti-fogging?

I think that the title says it all. To give context, I have experimental hints that glass is performing less badly than PMMA or PC at anti-fogging but I have not been able to build a DIY experimental ...
mathieu's user avatar
  • 101
0 votes
4 answers
190 views

Do glass windows reflect heat? If so, how to mitigate that?

Saudi Arabia is planning a skyscraper city which is 500 m tall, 200 m wide, and 170 km long. It'll have an all-glass facade. So, a concern is that the glass will reflect the heat until the ...
Peer Kristijan's user avatar
0 votes
1 answer
39 views

Can High Wind Speed break Laminated Glass and bend Steel Pipes?

Planning on using Steel Pipes as frames for holding laminated glass in a high wind area. Four sides will be covered by glass and the roofing will be also be covered with glass. Planning on using a ...
TurbulentSecret's user avatar
-1 votes
1 answer
20 views

interior-mounted adhesive window films that reflect solar heat

Does a solar-heat-reflective film when adhered to the interior of a double-pane gas-filled skylight raise the temperature of the glass and, if so, does it increase it to such an extent that the glass ...
Tim's user avatar
  • 225
0 votes
1 answer
149 views

Plus and minus power of Cylinder

This is my glasses prescription, is the cylinder minus applied at the meridians 180 and 10? So the the light is diverged at 180 and 10? Or does the axis value refer to the horizontal axis of a ...
ThreadBucks's user avatar
-1 votes
1 answer
63 views

Safety of fiberglass, cloth

Is there a way to make fiberglass so safe that it can be used for everyday clothes? From what I've found glass fibers are itchy when thick, so reducing their diameter helps make them soft on touch. ...
Surprised Seagull's user avatar
0 votes
0 answers
117 views

How can a screen be projected on a transparent glass?

I am building something similar to Google Glasses although not exactly that. I am trying to find a way to project my 0.96inch OLED on a glass, but it can't block the front view. What I tried to do is ...
Abrar's user avatar
  • 23
1 vote
1 answer
49 views

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 ...
lakerice's user avatar
  • 113
2 votes
1 answer
150 views

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 ...
Abrar's user avatar
  • 23
0 votes
0 answers
22 views

Impact force of a viscous solid drop

I have a drop of molten glass (but could be every solid with high plastic behaviour), and my goal is to calculate the max force during impact. I think I could use the velocity at the impact point to ...
Mattia's user avatar
  • 19
1 vote
2 answers
545 views

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 ...
gunfulker's user avatar
  • 133
1 vote
1 answer
512 views

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 ...
lionheart's user avatar
  • 111
1 vote
2 answers
679 views

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 ...
gijoe's user avatar
  • 83
1 vote
1 answer
62 views

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: ...
Jebathon's user avatar
  • 113
11 votes
3 answers
2k views

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 ...
Vasiliy Sharapov's user avatar
3 votes
0 answers
61 views

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 (...
user1876484's user avatar
2 votes
3 answers
147 views

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 ...
flibwib's user avatar
  • 123
1 vote
1 answer
52 views

Database for stiffness matrix? [closed]

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 ...
Andy_ye's user avatar
  • 119
0 votes
1 answer
62 views

How much an unevenly heated glass plate bows?

In relation to this question about 3D printing, I wonder how much a 200 mm square glass plate heated only in a central 15 cm square region would bow upwards or downwards. According to the thermal ...
FarO's user avatar
  • 179
1 vote
1 answer
82 views

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 ...
Maarten's user avatar
  • 31
1 vote
1 answer
87 views

Laser beam welding

I would like to use a laser beam to weld small metal parts that are located within an air tight enclosure but want the laser head to be located outside the enclosure which would require the laser beam ...
Donny's user avatar
  • 11
1 vote
2 answers
504 views

Tempered glass physics

I have two related questions Why is a thicker tempered glass stronger than thinner? For example, I have to hit much harder at 3/4” tempered glass panel surface than I hit 1/4” panel in order for ...
Vortex's user avatar
  • 121
2 votes
2 answers
166 views

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 ...
pennstump's user avatar
  • 121
0 votes
1 answer
30 views

Will the pressure inside a pressing mold will be constant if I'm working with a fluid inside?

I'm pressing glass and I want to know if the pressure that the walls of my mold feel is the same through all the internal surfaces. I'm willing to assume that glass will behave purely as a fluid (very ...
corcholatacolormarengo's user avatar
0 votes
1 answer
63 views

Automatic tinting of a region of glass

I hope this is the right place to ask my question. I am conducting a feasibility study into whether or not it would be possible to tint a single region of a continuous piece of glass. Think of a ...
Eoin's user avatar
  • 1
0 votes
2 answers
54 views

Glass used in biometric machines

I would like to know what kind of glass is used in biometric attendance machines over which we press our thumb? Is there something special about these glasses or their manufacturing?
user17926's user avatar
0 votes
2 answers
159 views

Methods for cutting glass

I am trying to find the easiest way to cut a thick glass pattern (glass thickness of 1-3 mm thick) without breaking. I am considering laser cutting but I don't know if I can cut glass of this ...
Lydia Ioannides's user avatar
2 votes
3 answers
102 views

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 ...
KBriggs's user avatar
  • 121
18 votes
1 answer
1k views

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 ...
shay s's user avatar
  • 183
2 votes
1 answer
669 views

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. ...
Dilitante's user avatar
  • 127
1 vote
1 answer
3k views

Glue plastic to glass with chance for easy removal later

I have a 3d printed (ABS or PLA) case which houses small single board computer. I want to glue it to glass (car's windshield from the inside) so that it sticks nicely and does not vibrate. However, ...
Kozuch's user avatar
  • 213
0 votes
1 answer
92 views

Problem finding temperature gain of air through heated glass tube

I have a 20 cm long glass tube of outer diameter 6.4 mm and inner diameter 4.3 mm. Air at ...
Buzz's user avatar
  • 103
1 vote
0 answers
499 views

Will drilling a hole in a pane of glass reduce it's structural integrity?

I've got a glass box that measures 900mm x 450mm x 450mm. The width of the glass is 6mm thick. If I drill, cut, or grind a small hole in/through one of the faces; will it significantly affect the ...
voices's user avatar
  • 201
0 votes
1 answer
149 views

Why does the Ultimaker 3D Printer has a Heater + Heater transfer plate (aluminium) + Glass?

Why does the Ultimaker 3D Printer has a Heater + Heater transfer plate (aluminium) + Glass? I wonder why a glass plate, and if is possible to remove the glass and print directly in the aluminium ...
Kevin Mamaqi's user avatar
0 votes
1 answer
1k views

Glass Facade Load on edge of slab?

How do i calculate the load of a glass facade and is it placed uniformly on the edge of the slab or should i place a point load on each edge of the panel of the facade? And Can anyone give me a link ...
J.Daou's user avatar
  • 503