Fallkniven A1 Destruction Test Video Completed

the possum said:
No, that is not how this design is supposed to work traditionally. The sides are supposed to hold the blade together after the harder core steel has cracked. If this was indeed Fallkniven's goal, I guess that's up to them. But what happened here is not what people usually talk about when they're praising the virtues of laminated blades.
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Is it not? Funny, in Scandinavia the laminate design is just supposed to make the blade less likely to break - while maintaining the advantages of having a steel (core) that cuts and holds an edge better than the soft laminate sides and is therefore less tough and more likely to snap, crackle and pop. In this case, lamination made the knife less likely to break completely. Sounds like success to me. You're talking about a very specific kind of stress, and one that the blade did not encounter in this test. You're talking, for example, about chopping something so damn hard that the core cracks. Yes, in that case the laminate sides should keep the blade together. But things work differently when you stress the blade differently. When you're standing on the handle of a laminated blade slapped into a vise, the stress isn't directly on the core as it is when you're chopping, it's on the soft laminated sides. I really don't know why you don't see this, but hey, as I said, I've been known to be wrong more than occasionally - I'm not a bladesmith, I just use 'em.
 
noss4 said:
PatriotDan: with three layers of steel and top force and bottom force factors happening the same time to me the top layer is going to give first under the load this makes since to me. If I'm wrong then some one please correct me.

The VG-10 layer is thin compared to to full blade made of solid VG-10 so it is going to flex more. Cliffs example with the hack saw blades is a good one. One hack saw blades would flex more by itself then if you had many layers stacked on to of one another but it would increase it's overall force needed to make a bend.

Also with multi layers of steel or any other rigid materials each layer will shift for the one on top of it. If you place hack saw blades of the same length on top of one another and flex the entire structure you will see the the ends of the hacksaw blades move away from each other in a stair like pattern. The will not longer be even.
So there is several different factors happening with the laminated blade under a load.
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First let me say I appreciate your work, once again. I should have said that first. And I do understand what you're saying. But to me the first thing that should fail on an laminated blade is the steel, not the lamination. I really can't see lamination failure being the goal of the manufacturer.

I'm looking forward for your upcoming tests. :thumbup:
 
If the sides were to soft and bent and the inner core broke you wold have a bent knife that would not return to zero when the load was removed. The overall strength of supporting a heavy load would be decreased since the knife would simply bend under the load instead of supporting it.

So I guess there is a trade off you can have a knife that is strong and can support a heavy load and will return to zero or you can have a knife that bends
and remains bent and does not return to zero but it can not support the giving load.

PatriotDan: Thanks, I appreciate it.
 
Have you any plans to test a Scrapyard knife in the near future, I'm interested to see how SR77 performs ?
 
pitdog: Yes defiantly a scrapyard is at the top of my list. I don't have one in hand. I hope to soon.
 
Since the VG-10 core is the cutting edge of the knife. This you would want to protect from breaking not the outer layers.
 
As always, I enjoy your work Noss. You are providing an invaluable service to all us knife users. Can't wait for your Busse BM evaluation. Also looking forward to your Cold Steel sanmai eval. Keep em coming. Thanks
 
Thanks Noss4.This test re-enforces what I believed all along that Fallkniven make one hell of a good knife.Keep em coming.
 
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