Fracture of Pre-stressed Woven Glass Fiber Composite Exposed to Shock Loading

TL;DRAbstract

Fracture study of an orthogonally woven glass fiber-reinforced epoxy composite under shock loading was performed. A shock tube apparatus was utilized to produce dynamic loading, applied to pre-stressed composite specimens. The displacement and strain fields present in the material were observed using the 3D digital image correlation technique. Displacement components obtained from the DIC were analyzed with the use of an over deterministic numerical approach to determine the stress intensity factor present in the composite specimens. The effect of the orientation of the reinforcing fiber with respect to the crack faces was observed via the use of several specimen types, having various angles of fiber orientation. The effect of the value of prestress is also examined with the use of two distinct magnitudes of prestress. Results indicate that the value of applied pre-stress might significantly influence the velocity of propagating crack, as well as the out-of-plane displacement component

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