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Recommended models for mineral liberation in crushers
I'm investigating comminution processes at work, and from my studies I know that there are different breakage models for different modes (Compression, attrition, fracture etc).
So far I have only seen population models for ball mills in use. These…
MMerry
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ANSYS APDL Shape memory effect option of SMA not working
I am trying to define the material properties of a shape memory alloy material in ANSYS APDL V15. There are material properties for Superelastic materials (SUPE option) and material properties for Shape memory effect materials (MEFF option)…
imacube
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Are threads machined from high tensile steel more susceptible to damage?
I have an ASTM A311-04 1.25" diameter round 1050 steel bar that exhibits a tensile strength reading of 155,227 PSI. Normally, we receive material in the 13-133,000 PSI range. The bar is machined to a 5/8-18 UNF thread.
We have experienced instances…
Kevin14009
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Has a specific type of alternative intersection been shown to reduce congestion & accidents?
Localities in the US have different road layout and setups.
For example the Michigan Left, Jersey Left/Jug Handle, vs a standard 4 way stop with left turns at the intersection.
Have any of them come out as clear winners?
JedF
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What is the difference between direct and indirect learning control?
I found the following comments on direct and indirect control in "Survey on iterative learning control, repetitive control and run-to-run control." by Wang, Gao, and Doyle:
There are two application modes to use the learning-type control. First,…
andrewhunter
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How do I calculate the strength of a weld joining two crossed rods?
While considering this recent question, I started wondering how to determine the strength of the welds in the steel mesh. As AndyT points out in his comment:
The welds at the connections are only intended to keep the bars at
right angles during…
Air
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Mechanical advantage of the 3-ring release system
I'm quite curious about the 3-ring release system used in parachutes, as described in this Wikipedia article:
https://en.wikipedia.org/wiki/3-ring_release_system
I wonder why is this system so popular? I've been told it's nearly ubiquitous in the…
S. Rotos
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How can the alloying materials of recycled steels be separated?
As I know, a very considerable part of the currently processed steels (around half of it) is coming from recycling.
But during the steels coming into the recycling process are coming normally from various sources, and thus they are containing very…
peterh
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Can the structural integrity of bridges be measured in real-time for safety?
As a follow up to this question, I wonder if structural integrity monitoring information can be provided real-time and to a sufficient degree that safety decisions can realistically be made from the information.
To put things in context, in the USA…
Mahendra Gunawardena
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How is the design life of a reinforced concrete structure calculated?
The specifications for large structural projects typically call for the structure to have a specific design life. This can be 50 years, 100 years, etc.
Accommodating the design life for steel can be as simple as adding additional thickness to…
hazzey
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What's this mystery symbol on a manufactured machine?
I hope this is the right place to ask this question; if not I'd really appreciate some tips as to where else I can go for answers.
The symbol above (apologies for the blurry quality) is on a Chinese/Taiwanese-manufactured piece of testing…
FisherPeak
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How are the thermodynamics of CPUs and other chips handled?
I hear that designing the thermal efficiency of such systems is very difficult. I'm not sure why, though, and I am interested.
On the one hand, I bet the heat is somehow a function of the total power in the system. On the other hand, as individual…
MrSynAckSter
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Types of state observers/estimators actively used in the industry?
Most introductory books on control theory usually start their state observation part by introducing the Luenberger observer, and after that they might continue by introducing the Kalman filter. When reading papers from academic journals I have also…
Mika Sundland
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How do ultrasonic proximity sensors detect motorcycles differently from cars and trucks?
My car has ultrasonic proximity sensors to help me park. I've noticed that when motorcycles whiz past me the proximity alarm goes off. I originally thought that the motorcycles were just too close, but now I have observed that that isn't the case;…
nmtoken
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How do I keep my bit from wandering on a drill press?
I punch metals before I start a bit in them, but with small-diameter bits I am finding that they wander inside the material. E.g., drilling a 1/8" hole in 1/2" of aluminum the (titanium-coated HSS) bit will come out the other end a measurable…
feetwet
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