You didn't give the wood a fighting chance. You put them both with the grain vertical. Wood has amazing compression resistance when the grain is horizontal.
@@kyohiromitsu4010 I try to cut basswood (pretty easy to work with) against the grain and it takes a bit of elbow grease. I cut it along the grain and it splits like hot knife through butter
@@stevenpope940 The idea with the mat is to provide a universal grain orientation, and thus universal strength, rather than high strength in a single orientation. Had he tested the layered weave along the perpendicular it would have probably broken at 10 tons or less, rather than 40. The mat done properly should be somewhere between the 10 tons and 40 tons, but from any orientation.
@@_Jacks_ i build my house on solidworks before sending it to the architect firm. Set up the materials properties properly. Wood, concrete, steel. The estimation is probably off by few hundred kgs.
@@H_B_Rbut unfortunately, nothing will happen to the house underneath. Because the surface isnt flat your house would manage to connect to corners to ground even if the cube is over 5 cm. its more likely it will just be stuck inside the foundation quite a bit. That way making the foundation go to the ground. Now, if it was 2 feet long cube, that would be very fun.
I still want to understand what type of epoxy he used for the carbon fiber that way off the charts of my understanding of fiberglass and carbon fiber even Normal epoxy i know break faster than in the video
Maybe do the experiment in tension, to test the strength of the fibers not the compressive strength of the resin. I know doing tensile tests on a hydraulic press is difficult but you could wrap a concrete cylinder with resin infused glass and carbon fibre, then when compressing the concrete cylinder the fibers will be in tension.
Try spiral wrap of chopped, mat fiberglass, along with carbon fiber. Another one to try is cotton. Oh yeah the reason the chopped mat failed so quick was a void in the matrix that weakend it.
I like your videos. But I don’t like to see fibreglass strength tests when the glass (whether it’s weave or chopped strand mat) hasn’t been laminated correctly. Resting to glass ratio well off. No compression of the layers. Also, there are so many different grades of glass fibre. Some that will make carbons and Kevlars look weak in comparison. No mention on the grade of glass used?
@@Alfaomega2003 I’m guessing he wanted paste and didn’t have chopped strands, just chopped strand mat. He may as well have just used p40. Not that I wish to neg on the guy, I still enjoy all his videos I have seen. I just feel this one could have been much better.
Great video. In line with the fiber glass consider using Kevlar. There have been some studies done on impregnated Kevlar with shear thickening fluid to increase it effectiveness.
What I love is seeing the equal and opposite reaction response when the block breaks of the base pushing the force upwards towards the object it was having pushed down on it. Science!
Have you tried a metal matrix graphene carbon nanotube composite? Are you able to get your hands on boronitride carbon nanotubes or boronitride graphene?
Grain orientation is important. Like the carbon fiber, the fiberglass, wood and buffalo horn have grain directions, too. Also, from KG to tons? Do you mean tonnes (metric)? The distinction is really important.
Why is the distinction importnat? The difference between the two is 1%. For you as a viewer, how does the difference in the shown result affect you? Do you feel cheated in some way?
Hi, thanks for your interesting video! I do have to point out a couple of technical issues.. (sorry to be that guy, but...) The resin you mixed in the beginning was polyester resin, not epoxy. In cutting up the fibres and mixing it into a mash it lost all its strength, and made the fracturing easier. normally it would be layered like you did with the woven cloth. What weight per m2 for the cloth and csm did you use? Thanks again for your video. I hope to see one with the chopped strand layered like the cloth if possible?
You used too much resin, you don't saturate the cloth, you are supposed to stack the glass fibers and then work the resin into the glass. This makes a much higher glass to resin ratio
The way mat fibre glass was fabricated made many air voids inside. Should've put in little by little then force the air out by pressing the layups like what you did in woven fibreglass.
1. Always wear gloves and a mask when working with fiberglass. 2. As you see in the CF demos, direction matters. Wood is weakest along the grain lines, the real test would be to compress across the grain.
it really depends on what you want to do with the fibreglass with what was shown here is pretty much the worst way to do anything with fibreglass no matter what type of resin you use
Bruh all the mat fiber glass does is compromise the strenght of the epoxy itself, this is not a fiberglass vs carbon fiber test, is an epoxy vs reinforced epoxy vs contaminated epoxy test
Damn that epoxy carbon fiber across the fibers withstanding 100 tons of pressure is INSANE. I needed a medium for my epoxy press mold and I think I found the winner lmao does not need to withstand 100 tons though 🤣
As the names imply, fiberglass is made of small strands of glass that have been melted down, while carbon fiber is made of small strands of carbon atoms. Both materials can then be combined with an epoxy resin to create a stiff product that can fit any shape or mold
Both are fibre reinforced plastic (FRP). Kevlar and cellulose are popular too. Fibre reinforced metal is a thing as well. Fibre reinforced cement is a thing too (commonly referred to as fibrocement.
The strongest I have seen in these kinds of tests is HSS Steel Rockwell 69 range. A 300mm x300mm cube of this high speed steel won't deform until it explodes. With the softer steel used on the press tools it would start sinking into the plate after 150tons. It would likely take nearly 500 tons to explode the material. He has put a ceramic ball on top of this steel and after 50 tons it exploded. This is soley due to the fact that ceramic, or the high quality ceramic balls are nearly as strong as diamond when it comes to hardness. Because the high speed steel will not deform much it has no choice but to prematurely explode when a harder material is on top of it. There may be a few other alloys that may fair better but I would like to see a test with the high speed steels at 300mm. The carbon fiber funny enough fairs better than most steels in that carbon fiber doesn't deform much at all at 100 tons. Regular steel will deform starting at around 40 tons. And would measure likely 200mm after the 100 tons of force was applied.
Also interestingly a piece of AR500 or AR550 steel cubed 300mm 300mm of possible would likely be one of the toughest materials in the world to crush. I honestly do not think 500 tons would be enough to deform it more than 3mm.
Please use the safety glass to shield your cameras and it is not fair for the iron wood to be use vertically as you can see the wood grain has much more resistance when you out it horizontally.
Is that POLYESTER Resin or EPOXY. I know you labeled it as epoxy. But I have never seen epoxy like that. Such a small amount of "activator" in a small, clear liquid (methyl ethly ketone peroxide) is a POLYESTER resin. They are different in strength. Also the fact you are using CSM (chopped strand mat) SCREAMS to me POLYESTER resin. Expoxy can not bond in CSM ... it cant resolve the styrene molecules. I think you are using POLYESTER. And polyester is not as strong as epoxy. BUT .. with that said.. still great work! Its great to see in real life how much weaker CSM is.
Carbon fiber is made with a epoxy resin or polyester? And now a video the price for mat fiber glass, and carbon fiber glass? Epoxy resin is more stronger than a polyester resin?
