Experimental and numerical analysis of mixed mode fracture
Based on the global approach and the experimental measurements by digital image correlation,the presented study proposes a coupling between these two approaches in order to evaluate energy release rate.The proposed formalism allows calculating the energy release rate fracture parameters without considering the elastic parameters of material.The experimental analysis is realized using the specimens made in PVC isotropic material and Douglas fir (orthotropic material) under different mixed mode loadings.The loading under displacement control is applied using the Arcan system.From experimental data optimized by an adjustment procedure,the kinematic state in the crack tip vicinity is evaluated through the crack opening relative displacement factors.In parallel the stress state in vicinity of the crack tip is evaluated by a numerical analysis.This analysis is performed using the finite elements method and the integral invariant Mtheta,in order to evaluate the stress intensity factors.The finite element analysis is based on the reproduction of experimental test in terms of specimen geometry,experimental boundaries conditions and loading configurations.Then the energy release rate can be estimated by coupling of these two factors calculated without considering the material elastic parameters.Moreover,this method allows defining the local mechanical behavior.
Fracture mechanics Mixed Mode Experimental Numerical Digital Image Correlation
Octavian POP Mamadou Méité Frédéric Dubois Joseph Absi
GEMH,Université de Limoges,Centre Universitaire de Génie Civil,19300 Egletons GEMH,Université de Limoges,IUT du Limousin,Département GM,87000 Limoges
国际会议
北京
英文
1-9
2013-06-16（万方平台首次上网日期，不代表论文的发表时间）