Vergleich der Bruchenergiebestimmung an Zugspaltproben und der Längszugscherprüfung für die Charakterisierung von Holzverklebungen

Title
Vergleich der Bruchenergiebestimmung an Zugspaltproben und der Längszugscherprüfung für die Charakterisierung von Holzverklebungen

Author
Stefan Veigel , Jürgen Follrich , Wolfgang Gindl-Altmutter , Ulrich Müller

European Journal of Wood and Wood Products 2012 v.70 no.1-3 pp. 3-10

Abstract

In this study, lap shear strength as well as specific fracture energy of bonded specimens from spruce wood were determined in order to verify whether the calculation of adhesive fracture energy is a suitable tool for the mechanical characterization of different adhesive systems, especially in comparison to the commonly used lap joint test method according to the European standard method EN 302-1. Two different test methods were applied for measuring the fracture energy by using a double cantilever beam (DCB). For both methods the DCB is separated along the bond in mode I fracture. While both adhesive systems applied showed similar shear strength values, differences were much more pronounced regarding the specific fracture energy of the bonded joints. Especially the application of the fracture energy concept, i.e., the separation of the DCB in a single load cycle, provided results with higher informative value than the results of standard lap shear tests.

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