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2. Rubberwood - Wikipedia

   en.wikipedia.org/wiki/Rubberwood

   Rubberwood is a light-colored medium-density tropical hardwood obtained from the Pará rubber tree (Hevea brasiliensis), usually from trees grown in rubber plantations. [1] Rubberwood is commonly advertised as an " environmentally friendly " wood, as it makes use of plantation trees that have already served a useful function.

3. Janka hardness test - Wikipedia

   en.wikipedia.org/wiki/Janka_hardness_test

   When testing wood in lumber form, the Janka test is always carried out on wood from the tree trunk (known as the heartwood), and the standard sample (according to ASTM D143) is at 12% moisture content and clear of knots. [3] The hardness of wood varies with the direction of the wood grain. Testing on the surface of a plank, perpendicular to the ...

4. Wood method - Wikipedia

   en.wikipedia.org/wiki/Wood_method

   The Wood method, also known as the Merchant–Rankine–Wood method, is a structural analysis method which was developed to determine estimates for the effective buckling length of a compressed member included in a building frames, both in sway and a non-sway buckling modes. [1] [2] It is named after R. H. Wood.

5. Wear coefficient - Wikipedia

   en.wikipedia.org/wiki/Wear_coefficient

   As can be estimated from weight loss and the density , the wear coefficient can also be expressed as: [2] K = 3 H W P L ρ {\displaystyle K={\frac {3HW}{PL\rho }}} As the standard method uses the total volume loss and the total sliding distance, there is a need to define the net steady-state wear coefficient:

6. Specific modulus - Wikipedia

   en.wikipedia.org/wiki/Specific_modulus

   Approximate specific stiffness for various species of wood [53] Material Young's modulus Density (g/cm 3) Young's modulus per density; specific stiffness (10 6 m 2 s −2) Young's modulus per density squared (10 3 m 5 kg −1 s −2) Young's modulus per density cubed (m 8 kg −2 s −2) Applewood or wild apple (Pyrus malus) 8.76715: 0.745: 11. ...

7. Rubber elasticity - Wikipedia

   en.wikipedia.org/wiki/Rubber_elasticity

   Rubber elasticity is the ability of solid rubber to be stretched up to a factor of 10 from its original length, and return to close to its original length upon release. This process can be repeated many times with no apparent degradation to the rubber. [1] Rubber, like all materials, consists of molecules.