Nice set up, but this has the potential of introducing bending into the test piece. Both ends of the fixturing should have two pivots at 90 degrees. This ensures that the pull will be pure axial.
Interesting, I was wondering how you were actually implementing calculating your gun metal samples. Sure I could see the pressure Gage but not exactly what it was linked to. The little harbor freight device is worth remembering. Speaking of harbor freight I have recently bought a lot of tools to fill my needs as I build bows and crossbows with 60 pound prods that have twice the draw length of commercial devices so as to still impart a lot of energy to the arrow or bolt. Honestly, the machines are not top of the line at all but they are completely functional and I love my scroll saw and electric planer. I could not be competitive if I used a coping saw and strictly hand planes. So, here is to Harbor Freight who fills a need but just don't buy their hand planes unless you want to spend a lot of time fixing them.
It will likely become less and less accurate the more whatever you are testing deforms. It might be worth trying to set up two pulleys on top of the top beam with a cable that connects from one side to your sample then back to the other side. Then the force deflection and force on each side should be equal.
This guy is right. The test sample side will get longer - maxing out in length just at the critical ultimate strength. If the two sides don’t stay the same length does the tensile force on them equal?
Wow. That worked better than I expected. I am curious though why you couldn't build a rig to come out from the center of the press? so instead of matching each side you just make something stick out a little bit on the back side but center. I understand it will have a some what similar result as if you did just one side of the jack left to right but since the you could have the sample almost touching the jack wouldn't that make the problem of uneven weight distribution not as bad?
lol omg I'm sitting by an open window by a street and I jumped at the tires screeching. ok decaf coffee next I will review the video, math is difficult for me, but watching what was done and the results. Very interesting and understandable.
Nice work on the new setup. Do you thing you are going to make something to catch the chain after the sample fractures, because it does look like it smashed the bar pretty good when the aluminum gave way.
I had mine leftover from a wood stove installation. It's available on amazon and you can calculate the length you need based on the radius of your container. This would be more than enough: www.amazon.com/UniTherm-Ceramic-Insulation-Blanket-Furnaces/dp/B01BIB4R1M/ref=sr_1_3?ie=UTF8&qid=1533341296&sr=8-3&keywords=ceramic+blanket
If you want to improve this you need to be able to increase the pressure consistently and slowly over time. The test piece you turn should have a big radius at each end where you turn it down.
Hey I am doing a research project for Cal Poly Pomona Mechanical Engineering department, and I would love to chat with you, and pick your brain about a couple thoughts. If you can let me know the best way to contact you, that would be great. Thank you for the content!
Hello sir how much would it cost if you make me one! I am from Philippines..I would like to use this for my projects specifically fiberglass/composites...
Dude dude dude.. how about test on shitty welds like for building roll cages/frames? More of so for instance a go cart frame and/or steering components and a-arms? Lol I wish I knew about this a long time ago.
Good job. It's nice to be able to get proof of your theory.
game changer. well done.
Amazing ingenuity!
Thank you for sharing this with us. Very interesting.
May "the Force" be with you always...well done...Luke.
Nice set up, but this has the potential of introducing bending into the test piece. Both ends of the fixturing should have two pivots at 90 degrees. This ensures that the pull will be pure axial.
nicely done and on a budget!
you, sir, are a genius.
Excellent Job Brother!
Interesting, I was wondering how you were actually implementing calculating your gun metal samples. Sure I could see the pressure Gage but not exactly what it was linked to. The little harbor freight device is worth remembering.
Speaking of harbor freight I have recently bought a lot of tools to fill my needs as I build bows and crossbows with 60 pound prods that have twice the draw length of commercial devices so as to still impart a lot of energy to the arrow or bolt. Honestly, the machines are not top of the line at all but they are completely functional and I love my scroll saw and electric planer. I could not be competitive if I used a coping saw and strictly hand planes. So, here is to Harbor Freight who fills a need but just don't buy their hand planes unless you want to spend a lot of time fixing them.
Great video.
Brilliant !
Very interesting.
It will likely become less and less accurate the more whatever you are testing deforms. It might be worth trying to set up two pulleys on top of the top beam with a cable that connects from one side to your sample then back to the other side. Then the force deflection and force on each side should be equal.
This guy is right. The test sample side will get longer - maxing out in length just at the critical ultimate strength. If the two sides don’t stay the same length does the tensile force on them equal?
That was great, thanks for recommending it. Now I know where I'll be sending all of my samples Oh wait... I can't mail things to your channel ;-)
Wow. That worked better than I expected. I am curious though why you couldn't build a rig to come out from the center of the press? so instead of matching each side you just make something stick out a little bit on the back side but center. I understand it will have a some what similar result as if you did just one side of the jack left to right but since the you could have the sample almost touching the jack wouldn't that make the problem of uneven weight distribution not as bad?
lol omg I'm sitting by an open window by a street and I jumped at the tires screeching. ok decaf coffee next I will review the video, math is difficult for me, but watching what was done and the results. Very interesting and understandable.
Nice work on the new setup. Do you thing you are going to make something to catch the chain after the sample fractures, because it does look like it smashed the bar pretty good when the aluminum gave way.
Yep. I was thinking of putting a chain or cable between the shackles to keep it from jumping too much.
Did you find that missing wrench in the background?
Not exact science, but an excellent way to compare different compounds.
awesome awesome awesome!
interesting!
Great video as always. Would love to know where you got the ceramic wool for your forge and how much material it took.
I had mine leftover from a wood stove installation. It's available on amazon and you can calculate the length you need based on the radius of your container. This would be more than enough: www.amazon.com/UniTherm-Ceramic-Insulation-Blanket-Furnaces/dp/B01BIB4R1M/ref=sr_1_3?ie=UTF8&qid=1533341296&sr=8-3&keywords=ceramic+blanket
FarmCraft101 Thanks for this link.
FarmCraft101 yes thank you for taking the time
If you want to improve this you need to be able to increase the pressure consistently and slowly over time.
The test piece you turn should have a big radius at each end where you turn it down.
ASTM has drawings showing what samples should look like, check out 8E standards
Hey I am doing a research project for Cal Poly Pomona Mechanical Engineering department, and I would love to chat with you, and pick your brain about a couple thoughts. If you can let me know the best way to contact you, that would be great. Thank you for the content!
Message me on facebook. Link to my page in description.
BOMTOGL!
Hello sir how much would it cost if you make me one! I am from Philippines..I would like to use this for my projects specifically fiberglass/composites...
Dude dude dude.. how about test on shitty welds like for building roll cages/frames? More of so for instance a go cart frame and/or steering components and a-arms? Lol I wish I knew about this a long time ago.
Very good.