Haigh diagram for fatigue crack initiation prediction of natural rubber components

摘要: In order to investigate the fatigue lifetime prediction of natural rubber (NR), a criterion which determines number cycles initiation short crack is proposed. Uniaxial test results are plotted in Haigh diagram uses stress amplitude versus mean stress. It shows influence both parameters on life. A first extension multiaxial loadings has been studied using two kinds axisymmetrical notched samples an axial machine. second program was carried out with torsion tests. The corresponding 2D and 3D simulations finite element analyses have performed. uniaxial seems be conservative considering extension. experimental suggest that largest principal may main local parameter for life predictions NR components.