Is the early wood the weak link to cause set?

[Selfbowman]

Thinking out loud here.

[Allyn T]

That's a very interesting thought Arvin

[HH~]

Will it shoot anymore accurately? My most accurate selfbows have lower string tension at brace height and tend to get heavy at FD.

My hunt rigs have high string tension at brace but are not quite as deadly accurate as the the above type.

And. . .  the above type are even more accurate if they have taken a tad of set.

HH~

[Selfbowman]

Come on  Shawn set robes cast in all of them. It’s about building all of them better. That’s all. Arvin

[HH~]

Sure is. Elk wont know there's bone or horn on it.

Accurate tools are the coolest tools for me. Lets face it, you know well,  the best shootin selfbows send an arrow thru riser not around it. You proved that in 3D and my guess is you'll do it in unlimited class in flight.

Shawn~

[PatM]

 Set is wood cells that are shortened without actually collapsing completely.

[Selfbowman]

Set is wood cells that are shortened without actually collapsing completely.

😊ok Pat I agree. But my example is a thought of the direction in which cells fell. If the back stretches out then the early wood cells would be pulled toward the tips. Yes or no? While we think about that which direction are the belly cells going ? 😀😀😀
Arvin

[Selfbowman]

All of this to see if what we all probably know about early wood must be the weakest link. I’m still interested and trying to give myself a good visual of what’s happening in wood under stress and leverage. The stretch test opened my eyes. I’m getting a more clear mental vision.  Arvin

[RyanY]

Seems like it has been ignored but the effect of weak early wood would have to be strong enough to pull against the return of the late wood rings. Compression failures across limbs appear to happen across late woods often enough that it seems to be a weakness of wood to fail in compression in general. In bows with a larger proportion of early wood they need to be wider to take less set and will take less set if designed well which means it is a matter of overall density.

[willie]

Arvin,

in the circled area of your pic reposted below, does the angle of the short lines intend to show the top latewood slipping sideways from the bottom latewood? If so, this would be shear.

[willie]

Edit:  this pic is left up to provide context to the following posts by others.

[Selfbowman]

Yes your pic is more correct . I just build them I can’t draw well. And yes we would be talking sheer in this Scenario. This may cause the bow to return to its shape before being strung in a time release creeping. This happens till full breaking in. But because of the limb stretching it causes sheer.
Arvin

[sleek]

to illustrate better what I hoped to explain in my previous post.

the shear stress at the areas with the reds dots is more than at the green dots

I was of the impression sheer force is strongest in the neutral zone.

[willie]

to illustrate better what I hoped to explain in my previous post.

the shear stress at the areas with the reds dots is more than at the green dots

I was of the impression sheer force is strongest in the neutral zone.

If the bow was a constructed of a uniform or homonegous materiel, you would be correct, sleek.

I will try to edit my posts above to be more accurate. shear stress between layers of early wood and late wood is a different question. a more complex solution is in order,  for sure

[sleek]

to illustrate better what I hoped to explain in my previous post.

the shear stress at the areas with the reds dots is more than at the green dots

I was of the impression sheer force is strongest in the neutral zone.

If the bow was a constructed of a uniform or homonegous materiel, you would be correct, sleek.

I will try to edit my posts above to be more accurate. shear stress between layers of early wood and late wood is a different question. a more complex solution is in order,  for sure

What conditions must be met for my statement to not be correct?