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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What Manufacturing Process Is Needed To Stretch Vinyl Material Around A Cushion With Complex Curves While Not Creasing The Vinyl?
What manufacturing process is needed to stretch vinyl material around a cushion with complex curves, while not creasing the vinyl? The accompanying image exhibits a cushion that is a result of the ...
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Why are direct stresses at crack surface non-zero, but shear stresses are zero?
I'm studying ceramics, more specifically, modelling failure intensity under compression.
Apparently, the shear stresses at crack surfaces are 0 because they are a free surface. However I don't see how ...
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Grade C surface plate
Surface plates come in three grades: AA, A and B. The AA grade has the best flatness, while grades A and B have respectively 2 and 4 times less accuracy. Grade B is still much flatter than normal ...
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Optical table without holes
Most optical tables have holes. Are there also optical tables without holes? Or do these things have a different name?
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Heat press for low density polyethylene sheets
I want to create a double layer sheet with custom internal channels (created with CAD or similar software) out of two low-density-polyethylene sheets, similar to those used as greenhouse cover.
Is ...
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British Standard Steel BS5S82 propagation properties
I am looking for propagation data for the BS5S82 material (case hardened). I checked in MMPDS and ESDU but to no avail. does anyone know where I can find this data? Or at least similar materials in ...
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Will petroleum jelly degrade silicone elastomer?
I have gotten conflicting information on this question. If I put a bit (1/4 of a cc) of vaseline on a silicone elastomer part and then apply gentle pressure for hours will this degrade the elastomer? ...
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Manufacture of High Temperature Superconductor Circuit Trace
How would you go about making circuit traces out of high temperature superconductor (HTS)? Low temp superconductor traces have been made with pure tin, lead-tin, etc. But those materials are much ...
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Why marine steel is not always used in cooking applications
What are the main reasons why marine steel such as 1.4404 (316L) grade is not solely used in cooking and kitchen applications? Other than cost possibly? Why other grades such as 1.4301 (304) are so ...
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What is fracture toughness and how is it different from the strength of a material?
Strength is just the amount of force that an object can take before breaking, so what is fracture toughness?
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What's the difference between ductility and stiffness?
As far as I understand they both relate to the amount of deformation based on a given amount of stress.
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Can someone help explain the difference between strength and stiffness?
I just can't seem to get it through my head and I don't understand the difference. As far as I can understand, strength is a materials resistance to permanent fracture while stiffness would be ...
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What substances have the lowest dielectric strength (volts/meter)?
All the tables of dielectric strength I can find are lists of materials that engineers use as practical insulators, and air is usually the least insulating thing on the list.
Where can I find a more ...
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Single Photon/Electron Emitter
Is it possible to buy single photon/electron emitter in market for experimental purposes? If yes, can you please guide me where and how?
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Belt conveyor roller spring
I wanted to know if anyone could help in this area.
I want to create an inclined conveyor belt where, when a cargo box reaches the top of the conveyor belt, the rollers sequentially move down (maybe ...
