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

Autor: Huddhar, Arun, Desai, Abilash, Sharanaprabhu, C M, Kudari, Shashidhar K, Shivakumar, P S
Zdroj: IOP Conference Series: Materials Science and Engineering; September 2016, Vol. 149 Issue: 1 p012161-012161, 1p
Abstrakt: 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 (GIc and 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, GIc fracture toughness increases with increasing in pre-crack length, where as in GIIc the effect of increase in pre-crack length exhibits reduced fracture toughness.
Databáze: Supplemental Index