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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Zero Stiffness Matrix
Consider a material pressure cylinder that is considered 'broken', it has a stiffness matrix of zero, at time t = 0. Now assume that a gas was inside that cylinder, and initially offered no pressure ...
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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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Reactor tube material at moderately high temps (600-1000 C) with water vapor as primary constituent of flow
I work with a type of spectrometer (made by Picarro) that uses near-infrared lasers to measure the stable isotopic composition of water vapor. The samples measured are typically liquid water samples ...
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Is there a mechanical equivalent to a hi/low pass filter (as in electrical engineering)?
I have been wondering if there are certain media (for instance glass, air, foam, etc.) which are peculiar given their chemical composition and/or structure allowing them to filter out mechanical waves ...
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How to Improve Adhesion of Velcro to Plastic Suction Cups in Hot Climates
I am currently facing an issue with a product where Velcro is attached to plastic suction cups using adhesive. The Velcro tends to detach from the suction cups, especially in hot climates. Here are ...
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How can I describe cold work and atomic structure?
A copper wire (42 cm x 0.25 cm diameter) twisted to failure did not change its dimensions significantly. How can I visualize or quantify the cold work done (tensile at the exterior, compressive in the ...
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Thermal expansion during the course of melting (in metals specifically)
The question is with regards to Thermal Expansion at the point of melting.
My basic understanding is that a material will generally undergo linear thermal expansion until some phase change occurs (...
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What is the difference between work hardening and strain hardening?
I have come across the definition somewhere,"Work hardening, also known as strain hardening, is the strengthening of a metal or polymer by plastic deformation. This strengthening occurs because of ...
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Janka hardness of Carbon Fiber
I know that Janka hardness is a measurement used for wood. However since I want to build a guitar made of several materials I got curious whether anyone has ever used the Janka test to determine the ...
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Making Silicone Rubber Surface Conductive
Hey Engineering Community, a physicist this side.
I am tinkering on a project where I need a local deformation of the thin sheet(0.2mm thickness, 25cm*20cm dimension); pressing on the surface from one ...
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Replicating an impact impulse
I am building a test-rig for a device. I have operational data showing the device experiences impact loads resembling a half-sine pulse with width dt and magnitude F. The test rig's purpose is to ...
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What is an appropriate way to compare the impact properties between a plastic and a metal?
I'm currently looking at trying to compare the impact strengths between polycarbonate and aluminum to see which one performs better if made into a box and dropped. My intuition says that aluminum can ...
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How could predict the affect the of adding another element to alloy in the terms of thermal conductivity and material wear resistance?
I'm interested in the effect thermal conductivity affect and material wear resistance by adding different element to an already high thermal conductivity like GRCop-42.
My main interest are to the ...
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Valox 420 30% glass wear
I am seeking assistance regarding thermoplastic material wear on a new product I am developing.
The attached image is molded out of Valox 420 30% glass. In the left side image, the locking dents are ...
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Force required to deform sheet metal
Hi all. I am building a machine to deform sheet metal into corrugations. I have attached an image that I got off a presentation from MIT's website. In the example, they provide a formula for the ...
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