You could search at InsideWood:

http://insidewood.lib.ncsu.edu

https://www.sciencedirect.com/search?qs=wood%20properties&show=25&sortBy=relevance

Please check this useful PDF attachment.

You could search at Tortorelli (2009) Maderas y bosques Argentinos

@ María: Unfortunately the database doesn't include any physical or mechanical properties of woods, it's more about their anatomical characterization. But I'll definitely bookmark this link. Thanks!

@ Washim: Thanks for the pdfs. Unfortunately these papers don't include the properties and/or woods I'm looking for, but I'll surely go through their reference lists to see if I can find anything.

@ Arvind: Many thanks for drawing my attention to such interesting study on wood density! Moreover, it includes Nothofagus pumilio.

@ Laura: Thanks for the reference. It seems that Tortorelli's book (I've just got access to the index) may have the properties that I'm looking for of Nothofagus pumilio (page 310 >), but not of Berberis sp.. Would you by any chance have access to the Nothofagus pumilio's pages? If so, I would be most grateful if you could share them in pdf or in any other digital format.

Now, in search for Berberis sp.'s density and mechanical properties :)

All the best,

Vera

You can find some mechanical properties here:

http://www.chileanpro.com/?page_id=32

@ Laura: Many thanks for sending me further information privately! You've been most helpful!

@ Ricardo: Thanks for such useful link! Also bookmarked it!

Now, just missing the mechanical properties of Berberis sp....

talke a look to this article i think that american beech is te common name of nothofagus, echale una mirada a este articulo creo que american beech es como le dicen al nothofagus https://www.fpl.fs.fed.us/documnts/fplgtr/fplgtr190/chapter_04.pdf

@Ramiro: Thanks for sharing the link! I've also been using this 'must have' book for quite some time. Although American beech and Nothofagus pumilio species belong to the same order, they unfortunately (for my study, of course) belong to different families and genus...

I still can't find the mechanical properties of Berberis sp, more specifically Young's modulus (i.e., elasticity) and Poisson's ratio (longitudinal, radial, tangential). Can anyone please help me? Many thanks in advance!

I have somme colleagues working in tierra del fuego may be we can ask them if the can send you samples to do the work in your lab? it's always be interesting to have these informations... in any case the physical properties can vary in focntion of wood state also, then even if you could found values frome one condition may they are different in another ones...

@Ramiro: yes, I'm aware that wood properties can vary greatly depending on several factors (see link below, namely chapter 4C). I will send you a private message on the possibility of conducting real-world tests to obtain the values in question :)Thesis Towards Functional Analysis of Archaeological Objects throug...