Frequency-domain fatigue life estimation with mean stress correction

Abstract Two frequency-domain fatigue life calculation methods are presented which take into account the impact of the mean stress effect. The emphasis is set on the algorithm for fatigue life assessment of the method proposed by the authors. It is supplemented with a mean stress effect correction. Correction method is based on the direct transformation of the zero mean stress Power Spectral Density (PSD) due to mean stress. The method is verified on the basis of own results for the S355JR steel. The authors analyze five models for the designation of the probability density function used in the calculation process. The results are presented in the form of probability distributions after PSD transformation and the calculated fatigue life is being compared with the experimental life in fatigue comparison graphs. An analysis of the choice of a mean stress correction model is also widely discussed and a fatigue life estimation is also performed. The method proposed by the authors is being compared with the Kihl–Sarkani method for mean stress correction in frequency domain.

[1]  N. Soni,et al.  Evaluation of Mean Stress Correction Approaches in High Cycle Fatigue Life Prediction of Titanium Alloy Considering Notch , 2014 .

[2]  K. Kluger Fatigue life estimation for 2017A-T4 and 6082-T6 aluminium alloys subjected to bending-torsion with mean stress , 2015 .

[3]  Tadeusz Łagoda,et al.  Lifetime of semi-ductile materials through the critical plane approach , 2014 .

[4]  Turan Dirlik,et al.  Application of computers in fatigue analysis , 1985 .

[5]  M. Petrenec,et al.  Fatigue behavior of ferritic-pearlitic-bainitic steel in loading with positive mean stress , 2012 .

[6]  Adam Niesłony,et al.  Fatigue life prediction for broad-band multiaxial loading with various PSD curve shapes , 2012 .

[7]  John Goodman,et al.  Mechanics applied to engineering , 1904 .

[8]  Shahram Sarkani,et al.  Mean stress effects in fatigue of welded steel joints , 1996 .

[9]  L. Susmel,et al.  The mean stress effect on the high-cycle fatigue strength from a multiaxial fatigue point of view , 2005 .

[10]  Xinzhong Chen,et al.  Fatigue damage evaluation of broad-band Gaussian and non-Gaussian wind load effects by a spectral method , 2015 .

[11]  Luca Susmel,et al.  Multiaxial notch fatigue , 2009 .

[12]  M. Kawakubo,et al.  Mean stress effect on fatigue strength of stainless steel , 2015 .

[13]  T. Lagoda The influence of the mean stress on fatigue life of 10HNAP steel under random loading , 2001 .

[14]  John F. Mandell,et al.  Spectrum Fatigue Lifetime and Residual Strength for Fiberglass Laminates , 2002 .

[15]  Lance Manuel,et al.  Comparing Estimates of Wind Turbine Fatigue Loads Using Time-Domain and Spectral Methods , 2007 .

[16]  Janko Slavič,et al.  Frequency-domain methods for a vibration-fatigue-life estimation – Application to real data , 2013 .

[17]  Adam Niesłony,et al.  Spectral Method in Multiaxial Random Fatigue , 2007 .

[18]  Jaap Schijve,et al.  Fatigue of structures and materials , 2001 .

[19]  Adam Niesłony,et al.  Mean stress effect correction using constant stress ratio S–N curves , 2013 .

[20]  Roberto Tovo,et al.  Comparison of spectral methods for fatigue analysis of broad-band Gaussian random processes , 2006 .

[21]  Adam Niesłony,et al.  MEAN STRESS VALUE IN SPECTRAL METHOD FOR THE DETERMINATION OF FATIGUE LIFE , 2012 .

[22]  Vanja Pahor Kos,et al.  Fatigue Damage for Sweep-Sine and Random Accelerated Vibration Testing , 2015 .

[23]  D. Benasciutti,et al.  Spectral methods for lifetime prediction under wide-band stationary random processes , 2005 .

[24]  Adam Niesłony,et al.  Comparison of some selected multiaxial fatigue failure criteria dedicated for spectral method , 2010 .

[26]  Roberto Tovo,et al.  Frequency‐based fatigue analysis of non‐stationary switching random loads , 2007 .

[27]  K. Dilger,et al.  Experimental Investigation of Fatigue Crack Propagation in Residual Stress Fields , 2015 .

[28]  S. Kwofie,et al.  An exponential stress function for predicting fatigue strength and life due to mean stresses , 2001 .

[29]  J. Bendat,et al.  Random Data: Analysis and Measurement Procedures , 1971 .

[30]  Adam Niesłony,et al.  Comparison of the Rain Flow Algorithm and the Spectral Method for Fatigue Life Determination Under Uniaxial and Multiaxial Random Loading , 2004 .

[31]  Claudio Braccesi,et al.  Random fatigue. A new frequency domain criterion for the damage evaluation of mechanical components , 2015 .