An equivalent uniaxial stress process for fatigue life estimation of mechanical components under multiaxial stress conditions

Random fatigue. A new frequency domain criterion for the damage evaluation of mechanical components

“…When the stress state satisfies the hypothesis of Gaussian stationary ergodic signal and is synthesized by a single Power Spectral Density function (uniaxial stress state) [20][21][22][23][24], the literature shows a whole series of approaches that, starting from its Power Spectral Density function (PSD), allow to directly obtain an estimation of the damage [7][8][9][10][11][12][13].…”

Fatigue life estimation under multiaxial random loading by means of the equivalent Lemaitre stress and multiaxial S – N curve methods

“…The fatigue life prediction under multiaxial random loading has not reached a satisfactory level yet. Several methods [8][9][10][11][12][13][14][15][16][17][18][19] to estimate the multiaxial random fatigue life have been proposed in the recent past. Many of them are based on the critical plane method [13][14][15]18,19], which is traditionally formulated in the time domain as deterministic approaches.…”

“…Obviously, this would not be convenient for application in the design phase of mechanical components, especially when the fatigue life is included in the objective function of optimal design. Therefore, a great deal of effort has been devoted to develop a frequency domain formula of equivalent stress based approach which is able to reduce the computation cost and characterize the multiaxial stress effect [8][9][10][11][12]. In the field of engineering, the equivalent von Mises stress method proposed by Pitoiset and Preumont [9] is most popular.…”

Fatigue Equivalent Stress State Approach Validation in Non-conservative Criteria: a Comparative Study

“…The engineering approach to solving the multiaxial fatigue problem is to find the equivalent stress (Braccesi et al 2008;Tsapi and Soh, 2013); however, design engineers are often faced with difficulties in applying these approaches to multiaxial fatigue design of high cycle fatigue components, as in Budynas and Nisbett (2011);Cristofori et al (2008); Li et al (2009). One difficulty is that most of the existing multiaxial fatigue criteria can only provide good predictions for propor-Latin A m erican Journal of Solids and Structures 12 (2015) [2506][2507][2508][2509][2510][2511][2512][2513][2514][2515][2516][2517][2518][2519] tional (in-phase) loading, like reported by Weber et al (2001); Goncalves et al (2005); Papuga (2011).…”