elastic constants for wood/ bulk and shear moduli 1

I'm undertaking a project using biot theory to model the velocity of compressional waves through wood (oak) samples. However I'm having a hard time findig values for the elastic parameters such as bulk and shear moduli any help or data would be greatly appreciated.

cheers.

 

[kengo]

I'm interested in your research---whats the latest???

regards, kengo

 

[sugarengineer10]

It wood be great work if wood (oak or pine wood) is wel understood as vibration absorber and cheapest link for vibration transmiter. Again greatness will be prooved in simplicity if correct knowledge of mechanical and chemical properties are studied with respect to atmospheric condition and seasioning done to wood in aplication.

 

[DaveVikingPE]

Do you have a copy of the "Wood handbook--Wood as an engineering material" available at

http://www.fpl.fs.fed.us/documnts/FPLGTR/fplgtr113/fplgtr113.htm.

It give a lot of insight, though it might not answer your questions. Virginia Tech has a good wood engineering faculty,

http://www.vtwood.forprod.vt.edu/index.htm,

give them a holler - unless that's where you got to school already!

http://www.woodzone.com/properties.htm#sectE

lists properties of wood related to workability, it might be of some help.

But... you may have to do some serious research yourself to determine the properties you want. Are you working on a Ph.D. dissertation? Sounds very interesting.

 

[bengineer]

Just like the US Olympic team, wood is not homogeneous.

A good source for Young's modulus is the supplement to the National Design Specification. This gives E's in the range of 800,000 psi to 1,400,000 psi for Oak. The larger the piece being investigated the more variation in the elastic properties. If the specimen is relatively clear, the higher values of E may be used.