OP, on your last question: "Hardenability curves" exist for many steel alloys. Some are available online; many are published in the ASM Handbooks. Standard ASTM A255 covers the lab test set up. Results give hardness vs depth below the exterior surface that is in contact with the quenchant...
What i do to make people happy is add ADVISORY NOTES 1, 2, 3 , etc. You can write anything considered helpful, but it is non-mandatory. Never got any push-back. Its like no one ever thought of it before, duh. Example: PARTS HAVE SUCCESSFULL BEEN FABRICATED BY blah, blah. Keep grammar in...
Found this piece by a government lab. Only gives the equations, no derivations, but you might search further for those.
https://engineeringlibrary.org/reference/membranes-air-force-stress-manual
(Also remember doing something similar as a student for vibrating drum heads - time dependent wave...
Do a forensic analysis on the 'Nite Ize' ties you mentioned and use what they use. Similar materials are also used for medical endotracheal tube stylets. Appears to be something like three-nines aluminum or some alloy. wire | McMaster-Carr
OP is trying to optimize cost vs performance since now there is too much of both. One step down WCs would be the (cheaper) traditional low alloy steel penetrators - not quite as good, but maybe good enough and not quite as expensive. I'm not aware of any low cost material or manufacturing...
Looks like 2eqn/2 unk. Starting at what looks like the origin, label the points (going CCW), as O, A, B, C,D.
Did you try this?
Consider triangle OCD, and polygon OABC.
Forget the trig, try vectors
OC + CD + DO = zero
OA + AB + BC +CD +CO = zero
Too lazy to try myself but looks like it might...
Naturally there are variables such as the type of material, modulus, poisson ratio, strength, length of thread engagement… However without modeling it, you could prob calculate something reasonable. Assume the failure mode for a too-thin wall would be splitting across the hole when the...
I don't exactly know. For relatively small parts, I would dare say the convective temperature drop of the workpiece from a momentary blast of air is no more that of conduction loss to the die pot or the ram. (Speaking for closed die forgings.) I think pyrometer measurements and experimentation...
What's the question? Why 0.2%?
An offset of 0.2% (strain) is merely customary for practical reasons of measurement, especially with older analog machines using paper traces. (I've read that state of the art testing machines can record very close to zero offset. I've also seen specifications...
Hot shortness? I think that description is for high temperature failure close to the forging temp, although most modern steels have enough Mn to preferentially make globular MnS instead of flat FeS. I've seen rules of thumb on ratios and i'm sure someone will chime in. Some mills also use Ca...
Search 'Charpy aluminum' and 'Charpy A36'. Plenty of hits.
I don't know about the feasibility of predicting CVN from FEA models, although i know hear-say of similar work being done with fracture toughness. Complications you face are entwined in the crystallography and thermo of dislocation...
Not that it matters much, but large diameter bar stock, in the size to which you refer, whether steel or Al, is already forged.
At the melt shop molten metal is poured from the furnace into molds; after freezing the ingots are typically sent to the forging shop or rolling mill (because a 10...
Kasey, Agree with other posters regarding cold-working as an explanation to your 2nd, 3rd, 4th and maybe 5th bullets. A material condition offering less tensile elongation generally makes for better chip formation during machining, so I would say 'yes' to your 29 Feb 07:08 post.
Not knowing any details about stack demolition, i can only offer the following for a mitigating approach:
a. Put up barricades so no one's head is in the hazard zone?
b. Pre-demonish the bricks in a controlled manner in each section before lift-off?
c. Install airbags or a network or cribbing to...
