Shear Failure in Glued Contact Surface in RF-LAMINATE

What is the meaning of "Shear Failure in Glued Contact Surface" in the details of the RF‑LAMINATE Add-on module?

Answer:

In the case of cross-laminated timber plates that are not bonded on the narrow sides (see FAQ 3590) and a wall-like structural behavior, the torsion stress in the glued joints is often governing. This design is performed according to the explanations in the literature source given below, using the following equation.
FAQ 3590

η_{x} = \frac{τ_{tor, x}}{f_{v, tor}} + \frac{τ_{x} + τ_{x, z}}{f_{R}} = \frac{\frac{3 \cdot n_{x, y}}{b (n - 1)}}{f_{v, tor}} + \frac{\frac{\frac{\partial n_{x}}{\partial x}}{n - 1} + τ_{xz}}{f_{R}} \leq 1

b	Board width
n	Number of board layers
n_xy	Shear in the layer plane
∂n_z / ∂x	Shear of board layers
τ_xz	Shear in the thickness direction
f_R	Rolling shear strength
f_v,tor	Torsional shear strength