A Method to Determine the Plastic Bending Angle of Dowel-Type Fasteners

In timber joints with dowel-type fasteners, the yield moment of the fastener is an important parameter. For fasteners of hardened steel, e.g. self-tapping screws, the yield moment cannot be calculated and has to be measured in a bending test as established in EN 409. The yield moment is defined at a plastic bending angle of α = 45°/d ^0.7. Therefore, the determination of the plastic bending angle is important to derive the characteristic yield moment of fasteners. For a proper derivation of the fastener’s yield moment, the onset of plastic deformations must hence be identified in order to be able to determine the correct plastic bending angle. A new method for the determination of the plastic bending angle was developed which is independent of a ductile or brittle behaviour of the fastener. The method is generally applicable to different fastener types with various diameters.

Authors and Affiliations

1. Timber Structures and Building Construction, Karlsruhe Institute of Technology, R.-Baumeister-Platz 1, 76131, Karlsruhe, Germany

   Michael Steilner & Hans Joachim Blaß

Corresponding author

Correspondence to Michael Steilner .

Editors and Affiliations

1. Timber Structures, University of Stuttgart, Stuttgart, Germany

   Simon Aicher

2. Department of Construction Materials, University of Stuttgart, Stuttgart, Germany

   H.-W. Reinhardt

3. Construction Materials, University of Stuttgart, Stuttgart, Germany

   Harald Garrecht

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