Characterization of Delamination Crack in Multidirectional E-glass/epoxy Composite under Mode I Loading

Authors : Fatih Darıcık, Züleyha Aslan

Pages : 117-128

Doi:10.26701/ems.341788

View : 91 | Download : 8

Publication Date : 2017-11-27

Article Type : Research Paper

Abstract :In this study, mode I critical strain energy release rate insert ignore into journalissuearticles values( G Ic ); of unidirectional E-glass/epoxy was determined by double cantilever beam insert ignore into journalissuearticles values(DCB); test. Calculated G Ic was used to initiate delamination in numerical models. The effect of stacking sequence and fiber orientation of the sublaminates and the effect of thickness on mode I delamination crack length and G Ic distribution along the specimen width in 0 o //0 o interface have been studied using ANSYS ® . 3-D 8-node linear interface element INTER 205 is used to create a predefined crack path. To investigate the fiber orientation effect , composites with [+θ 2 , 90 2 , -θ 2 , 0 2 ] s stacking sequences were modeled. Interlaminar fracture analyses were performed by Virtual Crack Closure Technique insert ignore into journalissuearticles values(VCCT);. Experimental and numerical critical loads insert ignore into journalissuearticles values( P cr ); showed a good agreement. According to the results, while fiber orientation affects significantly the extended crack length and the G Ic distribution along the specimen width, stacking sequence only affects the G Ic distribution.
Keywords : E glass epoxy, Double Cantilever Beam, Delamination, Mode I Fracture

ORIGINAL ARTICLE URL