Determination of the size dependence of the energy release rate for mode I loaded DCB specimens

Bidragets oversatte titel: Bestemmelse af størrelsesafhængighed for energifrigørelsesgraden for modus I belastede DCB emner

Jon Svenninggaard

Publikation: Konferencebidrag uden forlag/tidsskriftAbstraktForskning


Large scale bridging in delamination of fiber reinforced composites is an important mechanism that is important to understand. In for example wind turbine blade design, this is of great importance as cracks may propagate from resin filled areas, wrinkles, air bubbles or manufacturing defects. Initiation of cracking and delamination for mode I loaded DCB specimens made from wind turbine grade unidirectional H-glass and polyester will be evaluated. The study concerns the size effect, where different thicknesses of the specimens are evaluated. Specimens, with thicknesses ranging from 6 mm to 20 mmm will be tested.
The tests are performed according to ASTM D5528, on a newly calibrated Zwick 100 kN test machine. The crack length is monitored real time using a full HD video camera and the crack opening is measured using a clip gauge.
In order to find the cohesive parameters, the measurements allow for the plotting of the R-curve using the J – integral (Rice 1968) approach. These parameters are then compared and the size effect can be determined.
Bidragets oversatte titelBestemmelse af størrelsesafhængighed for energifrigørelsesgraden for modus I belastede DCB emner
Publikationsdato22 sep. 2015
Antal sider1
StatusUdgivet - 22 sep. 2015
BegivenhedFEMS Euromat 2015: European Congress and Exhibition on Advanced Materials and Processes - Warszawa, Polen
Varighed: 20 sep. 201524 sep. 2015


KonferenceFEMS Euromat 2015