Studies on effect of pre-crack length variation on Inter-laminar fracture toughness of a Glass Epoxy laminated composite

International Conference on Advances in Materials and Manufacturing Applications 2016

Huddhar, Arun^1 ; Desai, Abilash^1 ; Sharanaprabhu, C.M.^2 ; Kudari, Shashidhar K.^3 ; Gouda, P S Shivakumar^1

Dept. of Mechanical Engineering, SDMCET, Dharwad, India^1

Dept. of Mechanical Engineering, BIET, Davangere, India^2

Principal, Sphoorthy Engineering College, Hyderabad, India^3

关键词: Double cantilever beam;    End-notch flexures;    Fiber reinforced polymer composites;    Glass epoxy;    Glass-epoxy composites;    Mode II;    Pre-cracks;    Through-thickness;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/149/1/012161/pdf
DOI  :  10.1088/1757-899X/149/1/012161

来源: IOP

【 摘 要 】

Laminates of fiber reinforced polymer composites are good in in-plane properties and inherently weak in through thickness direction. To address this through thickness properties, the inter-laminar fracture toughness (GIcand GIIc) of a unidirectional (UD) Glass epoxy composite laminates were subjected to Mode-I and Mode-II loadings. Experiments were conducted using Double cantilever beam (DCB) and End notch flexure (ENF) specimens with varying pre-crack lengths. Mode I energy release rate (GIc) were also evaluated with modified beam and modified compliance theories. The experimental results reveal that, GIcfracture toughness increases with increasing in pre-crack length, where as in GIIcthe effect of increase in pre-crack length exhibits reduced fracture toughness.