Questions tagged [materials]
Use for questions about designing, manufacturing or synthesizing engineered materials or about the properties of specific materials. Questions concerning common construction materials, such as wood, steel or masonry do not need to use this tag; use the more specific tag instead.
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How to go from a metal sheet to a metal box using (set of) dies only?
As a hobbyist, how to go from a metal sheet to a metal box (1 hollow side) by using (set of) dies only?
All videos I watched involved :
bending 1 side at 90° then
A) cut twice and discard a square ...
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Rotation of a tube
See image... why is it that in part 1 the answer is negative but in part 2 it is added instead of subtracted?
I thought because I got a negative in part 1 I would have to subtract in part 2 but the ...
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Can a decent grade stainless steel preserved in a optimal environment last for trillions of years? Or would it at some point ,turn into dust
Can a decent grade stainless steel preserved in a optimal environment last for trillions or gazillions of years? Or would it at some point ,eventually turn into dust or even smaller like into atoms.
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Need to know tolerance of certain rubbers to pH 11 Bases
I need to know whether neoprene and HNBR (Hydrogenated Nitrile Butadiene Rubber) seals can tolerate pH11 atmosphere. The seals would be in touch with a fertilizer which is pH11.
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Which formula to use to calculate the main vibratory frequencies of a wooden joist floor? (8 Hz?)
When a wooden floor joist is a little undersized, there is a vibration phenomenon when walking on the floor.
In some forums, I've often seen a frequency of 8 Hz mentioned when walking on the floor, ...
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What materials where used in this study or ones that would make the most sense please!
I understand that they used two different materials and combined them through fiber drawing process but I don’t truly understand which materials were used. Here is where it is mentioned in the article....
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What would be the best capacitor to use for a railgun that uses a capacitor as the projectile?
I have had a long-time interest and fascination with railgun technology and for a long time I have wanted to build a small-scale, simple railgun as a scientific experiment. This railgun is designed to ...
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Price of e-beam evaporator [closed]
I'm trying to find an accurate price estimate for an electron beam evaporator for a research project. The intended application is for use in large-scale manufacturing.
How does one usually go about ...
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Failing engine A-Mount (bad design by the automotive manufacturer?)
I currently own a Tata Nexon Petrol car (in India) where I have seen (on facebook, Telegram, WhatsApp owner groups and youtube) that the A-Mount on the engine has suffered multiple failures for some ...
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Material suited for fixing leakage in liquid nitrogen dewar
I need to fix a leak on the inside of a liquid nitrogen dewar which acts as the coolant tank for a spectroscopy CCD camera. Due to the design of the camera, I unfortunately can only access the inside ...
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Lubricants for dissimilar metals
We are trying to maintain a Grubb telescope built in 1875. We think that the bearing surfaces are either brass to brass or brass to cast iron. Can anyone help with types of lubricants that could be ...
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Plane strain delamination on bilayer material (conversion from material stress state to residual force and moment)
I have been reading the book The Mechanics and Reliability of Films, Multilayers and Coatings (https://doi.org/10.1017/9781316443606) on chapter 4.2 and got stuck in chapter 4.2 and 4.3.
Suppose that ...
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Tolerances in the manufacture of mechanical parts (plastic)
It is necessary to make an adapter ring for connecting the smartphone to the microscope eyepiece (turn from ABS on a lathe, or 3D printing). Microscope eyepiece diameter is 33mm.
What should be the ...
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How is fuzzy velvet-like surface on plastic achieved?
This kind:
It's a very thin layer of very short (<1mm) hairs, coating a hard plastic underneath. I encounter this sort of lining on some mid-tier electronics that pretend to be more classy than ...
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How can I calculate the maximum center load on a horizontal cellular glass tile; supported along its edges, before it breaks?
Insulating cellular glass boards or tiles are designed to sit on a flat load-bearing surface. I want to consider the situation where the base is concave so the tile is only supported on its edges. I ...
