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ksandom t1_j2a6ewa wrote

It's the nut in the position it was when it broke?

It so; then that will be a contributing factor for why it broke. Ie when the nut is in one of the designated places closer to the pivot the force applied to the nut compared to the force the you apply is much higher. But when you move it out like that, you have to apply a lot more force to apply as much force on the nut as the designated places, which gives you a much higher chance of breaking the nut cracker.

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tchuruck OP t1_j2afqty wrote

Thank you for taking the time to explain that ! I did however crack the nut correctly. I think the nutcracker had just run its course. I placed the nut incorrectly for the picture because I didn't pay sufficient attention.

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ksandom t1_j2ainve wrote

That makes sense. It was probably also easier to photograph that way.

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vegancookie t1_j2d2zox wrote

Well if you weren’t paying attention for the photo were you paying attention when you cracked the nut? Did you have a nut cracking specialised observing you? OP we have many questions, and I seriously doubt your competency.

/s I came here to see if anyone else noticed the incorrect positioning too :p

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tchuruck OP t1_j2d33uy wrote

I'm a pretty decent cracker of nuts, only I was let down by my tool ! I swear on my nutcracking honor, I was using it properly.

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exdigguser147 t1_j2at1u4 wrote

If the nut was between the points like in the picture there is zero chance the nutcracker would break in the spot that it did. (From a beam bending standpoint)

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ksandom t1_j2c85o6 wrote

Good point. I agree that it is less likely.

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[deleted] t1_j2a8nkk wrote

[deleted]

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NoMight178 t1_j2abp3m wrote

Erm what... Are you telling me that if I put 50kN of force on this nut "suddenly" it doubles the load to 100kN of force??! Not sure where you went to school but I'm pretty sure that's not how it works. If we are talking about the speed applied and there being a distance involved that's a different matter but it wouldn't miraculously double the load applied.

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CanuckAussieKev t1_j2ahcvl wrote

I guess he's just trying to generalize how a change in acceleration will affect the force?

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smurficus103 t1_j2bfi9p wrote

There are certainly derivatives of acceleration. Jerk is change in acceleration over time. It didn't seem particularly useful for stress calculations, though. I read pretty deep into impulse without much insight into what loading i should use to calc shit. Did some vibrational fea mostly for fatigue life.

This sounds like a fatigue and probably some shitty quality metal

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