What is the meaning of 'Shear Failure in Glued Contact Surface' in the details of the RF-LAMINATE add-on module?


In the case of cross laminated timber panels not glued to the narrow sides and a wall-like structural behaviour, the torsion stress in the glued joints is often decisive. This design is performed according to the explanations in the literature reference below according to the following equation.

$\eta_x=\frac{\tau_{tor,x}}{f_{v,tor}}+\frac{\tau_x+\tau_{xz}}{f_R}=\frac{\displaystyle\frac{3\ast n_{xy}}{b(n-1)}}{f_{v,tor}}+\frac{{\displaystyle\frac{\frac{\partial n_x}{\partial x}}{n-1}}+\tau_{xz}}{f_R}\leq1$

  • b board width
  • n number of board layers
  • nxy shear in pane plane
  • $\frac{\partial n_x}{\partial x}$ shear of board layers
  • $\tau_{xz}$ shear in thickness direction
  • fR rolling shear strength
  • fv,tor torsional shear strength
For the y-direction, the design is analogous but with the values for the y-direction.


Shear failure Contact surface Torsion



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RFEM Other

Add-on Module

Deflection analysis and stress design of laminate and sandwich surfaces

Price of First License
1,120.00 USD