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Determining the microstructure of steel after welding in modern computer software
How can the microstructure of steel after welding be determined in modern computer software?
I am aware that there are 'classic' methods of predicting microstructures like Schaeffler, DeLong or WRC constitutional diagrams. What I am wondering about…
bartosz.baczek
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Getting high RPM out of a low RPM motor
I'm trying to use a 1500 RPM-rated electric motor to accelerate a (light, 25kg) shaft up to 50 000 RPM. At these speeds I figure using a belt system or roller chains is out of the question due to wear and friction; are these kinds of speeds possible…
Thomas
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Does unloading beyond yield point also affect tensile strength?
I know that with strain-hardening you increase the yield and tensile strength. So if you unload at point D, then you also have cold worked it a bit right?
So the stress-strain curve will look different after point D and have a higher tensile point?
strateeg32
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4
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3D Representation of Magnetic Field Lines
There are several tools available for monitoring electrical metrics (voltage, current, resistance, frequency). I have recently acquired all that I need for these studies.
What tools are available for monitoring magnetic metrics (force, flux,…
4
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Suggestions on how to keep electronics cool in high ambient temperature location?
What are the best materials and methods to keep the internal temperature of a device lower then the ambient temperature outside of the device? Based on the following information:
Starting temp of device is 20°C
Ambient temperature around the device…
Dave
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Formula to describe flow over thin weir
I have thin weir, really just a sheet of metal with a smooth and straight upper edge. I want to know how much water will flow over this weir, when the water level on the higher side is a few cm above the edge.
I'm interested in the special case when…
mart
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How to calculate the relative contribution of each mode in seismic dynamic mode analysis?
In structural dynamic mode analysis, one would have to carry out modal analysis in order to get different modes that contribute to the response of the seismic ( or wind) force. Here is a nice summary.
In a large structural model, there are so many…
Graviton
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4
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What type of bearing could be used to keep a utensil level while being moved from plate to mouth?
I need a bearing that the inner bore will stay level and balanced when the out ring is rotated. My son with autism lacks the motor function to feed himself with a spoon. He can turn his wrist, when the spoon goes to his mouth its 90 degrees off. I…
kiel starforth
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Is an Explosion Proof Circuit Breaker Panel Required at a Gas Station?
Check the attached photo of a gasoline station.
The two panel boxes at the center of the photo (in the corner of the station) are standard panels (IP-67), which enclose standard circuit breakers for the main gas pumps of the station.
They are less…
Brethlosze
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How to Calculate Mean Radius of Irregular Contact Face (Torque Transmission)
In a simple situation, one simply takes the average of outer diameter and inner diameter to gain the mean radius for calculating torque transmission through a contact face, such as a clutch.
But how would you work this out if there was no simple ID…
j0nr
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Removing beam deflection through axial force
It's been a while since I've done any comprehensive work with structural dynamics, so let me know if I get anything wrong here.
I have a horizontal beam that is clamped on one end and free on the other. It has the following parameters:
length…
anonymouse
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4
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Why can't red flint glass be produced?
I recently went on a tour of a glass manufacturing facility who produce bottles for the prestige alcohol market. I was informed on the tour that red glass cannot be directly produced - any bottles that I have seen had made by applying a spray to a…
Phizzy
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What is the correct term for long cuts in a floor joist?
I would like to identify the correct term for a long, lateral cut within a floor joist.
Based upon this guide and several other sources that I have come across, a notch is a cut that is allowed to have a width up to $\frac{1}{3}$rd of the depth of…
user16
4
votes
2 answers
Effect of varying diameter bolts on shear stress under eccentric loading
In my mechanics of materials class we are required to be able to solve problems with bolts in shear. Unfortunately our textbook doesn't cover this subject we only had a little bit of information given on slides and I am having trouble finding other…
Devin Crossman
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How can the bearing capacity of an existing tarmac road be determined?
From a typical ground investigation borehole log the tarmac thickness is recorded but no tests have been carried out on the road surfacing or formation level. I'm after an approximate bearing capacity of the road surface, including the contribution…
steinbock
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