Abstract
Keywords:
Dynamic nonlinear fracture, 3PB specimen, Crack mouth opening displacement, Viscoplastic property, J-integral
Abstract
Numerical calculations are made in order to find a possible relation between the J-integral and the crack mouth opening displacement(CMOD) in dynamic nonlinear fracture experiment of 3-point bend(3PB) specimen. Both elasticplastic and elastic-viscoplastic materials are considered at different impact velocities. The J-integral may be estimated from the crack mouth opening displacement which can be measured directly from photographs taken during dynamic experiments.