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

Jon Svenninggaard

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

Jon Svenninggaard

Maskiningeniør Horsens

Research output: Contribution to conference without a publisher/journal › Abstract › Research

Abstract

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.

Translated title of the contribution	Bestemmelse af størrelsesafhængighed for energifrigørelsesgraden for modus I belastede DCB emner
Original language	English
Publication date	22 Sept 2015
Number of pages	1
Publication status	Published - 22 Sept 2015
Event	FEMS Euromat 2015: European Congress and Exhibition on Advanced Materials and Processes - Warszawa, Poland Duration: 20 Sept 2015 → 24 Sept 2015

Conference

Conference	FEMS Euromat 2015
Country/Territory	Poland
City	Warszawa
Period	20/09/15 → 24/09/15

Cite this

@conference{33473b972e73446389e7db05216a939a,

title = "Determination of the size dependence of the energy release rate for mode I loaded DCB specimens",

abstract = "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.",

author = "Jon Svenninggaard",

year = "2015",

month = sep,

day = "22",

language = "English",

note = "FEMS Euromat 2015 : European Congress and Exhibition on Advanced Materials and Processes ; Conference date: 20-09-2015 Through 24-09-2015",

}

TY - ABST

T1 - Determination of the size dependence of the energy release rate for mode I loaded DCB specimens

AU - Svenninggaard, Jon

PY - 2015/9/22

Y1 - 2015/9/22

N2 - 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.

AB - 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.

UR - http://euromat2015.fems.org/

M3 - Abstract

T2 - FEMS Euromat 2015

Y2 - 20 September 2015 through 24 September 2015

ER -

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

Abstract

Conference

Other files and links

Cite this