In the present paper, a new formulation of the modified C-S criterion is discussed.The modified C-S criterion is a critical-plane-based multiaxial high-cycle fatigue criterion, where the multiaxial fatigue limit condition is represented by a quadratic combination of the equivalent normal stress and the shear stress amplitude, acting on the critical plane. The new formulation here proposed consists in the implementation of the Maximum Rectangular Hull (MRH) method (to evaluate the shear stress amplitude), which is very simple and computationally more efficientthan the Minimum Bounding Circle method. Some experimental data available in the literature are analysed, and the fatigue strength estimations determined by applying both the above new formulation of the modified C-S criterion (based on the critical plane approach) and the Araújo et al. criterion (based on the stress invariants approach) are compared.
MRH method and modified C-S (Carpinteri-Spagnoli) criterion
Camilla Ronchei;
2013
Abstract
In the present paper, a new formulation of the modified C-S criterion is discussed.The modified C-S criterion is a critical-plane-based multiaxial high-cycle fatigue criterion, where the multiaxial fatigue limit condition is represented by a quadratic combination of the equivalent normal stress and the shear stress amplitude, acting on the critical plane. The new formulation here proposed consists in the implementation of the Maximum Rectangular Hull (MRH) method (to evaluate the shear stress amplitude), which is very simple and computationally more efficientthan the Minimum Bounding Circle method. Some experimental data available in the literature are analysed, and the fatigue strength estimations determined by applying both the above new formulation of the modified C-S criterion (based on the critical plane approach) and the Araújo et al. criterion (based on the stress invariants approach) are compared.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
