BS EN 310 Wood Testing Machine

BS EN 310: 1993-  Wood-based panels: Determination of modulus of elasticity in bending and of bending strength

Scope:

This specifies a method of determining the apparent modulus of elasticity in flatwise bending and bending strength of wood-based panels of nominal thickness ≥ 3mm.

Normative Reference:

EN 325, Wood-based panels – Determination of dimensions of test pieces.

EN 326-1, Wood-based panels – Part 1: Sampling and cutting of test pieces and expression of test results

Principle:

The modulus of elasticity in bending and bending strength is determined by applying a load to the center of a test piece supported at two points.  The modulus of elasticity is calculated by using the slope of the linear region of the load-deflection curve.  The value calculated is the apparent modulus, not the true modulus, because the test method includes shear as well as bending.  The bending strength of each test piece is calculated by determining the ratio of the bending moment M, at the maximum load F_max, to the moment of its full cross section.