Test fikstur til dobbelt cantilever bjælke emner belastet med uens bøjemomenter

Jon Svenninggaard, Jens Andreasen, Brian Bak, Esben Lindgaard

Publikation: Konferencebidrag uden forlag/tidsskriftPosterForskning


With the increased use of modern lightweight materials like layered fibre reinforced polymers there is an inherent demand to characterize their properties. One of the critical failure modes in layered materials is delamination due to the low out of plane strength. To characterize the interface strength in layered materials the cohesive law and fracture strength must be known. Ideally the entire cohesive law is known in order to aid in the design of components and structures.
In this work we present a novel test fixture which can be used to test DCB specimens that are subjected to pure Uneven Bending Moments as a function of the phase angle ranging from mode I to mode II loading including mixed modes in-between. The test fixture utilizes an existing tensile testing machine and can subject specimens to loads up to 350 Nm. The test fixture is compact in size and designed using standard aluminium profiles for the main structure. The load is transferred from the test machine to the specimen through a 2 mm Dyneema rope. The rope is routed over a set of rollers that are positioned according to the specified mode mixity and phase angle.
The kinematics of the test fixture has been analysed extensively as well as a specially fabricated tool, made from two flat bars, which was fitted with strain gauges to verify that the strain field from the pure moment application. The analysis revealed negligible introductions of shear forces to the specimens.
Bidragets oversatte titelTest fikstur til dobbelt cantilever bjælke emner belastet med uens bøjemomenter
Publikationsdato15 mar. 2017
StatusUdgivet - 15 mar. 2017
Begivenhed16th Internal DCAMM Symposium - Middelfart, Danmark
Varighed: 13 mar. 201715 mar. 2017


Konference16th Internal DCAMM Symposium


  • Teknik, ingeniørvidenskab og IT