Fatigue Method Survey Revision A By Tom Irvine Email: tom@vibrationdata.com November 14, 2014 _____________________________________________________________________________________ Introduction Results I recently performed an informal survey where I simply asked engineers which fatigue methods Table 1. Software Programs they used. 61 engineers responded. I then Code Respondents tabulated the keywords for software, methods Nasgro (fracture) 8 and standards in Tables 1, 2 and 3, respectively. If someone used the same keyword more than nCode 8 once, then I only counted it one time per Unspecified Nastran 5 respondent. Ansys 4 I did mention in the survey that I use ASTM E Fe safe 4 1049-85, section 5.4.4, for time MSC Nastran 3 domain rainflow counting. I then feed the ABAQUS 3 results into the Miner’s cumulative damage Patran 2 summation. And also that I use the Dirlik, Single Femap 2 Moment, and similar spectral moment-derived methods for frequency domain fatigue NX Nastran 2 calculations. So some engineers replied that Autodesk Nastran 1 they use the same methods. Comsol Multiphysics 1 In addition, I have recorded their responses in FEMFAT 1 Appendix A, minus their names and company. WAFO 1 The respondents represent both U.S. and Matlab 1 Europe. They are also from a number of industries including aerospace, automotive, wind power, nuclear energy, offshore, etc.
Fatigue Method Survey Revision A By Tom Irvine Email: tom@vibrationdata.com November 14, 2014 _____________________________________________________________________________________ Introduction I recently performed an informal survey where I simply asked engineers which fatigue methods they used. 61 engineers responded. I then tabulated the keywords for software, methods and standards in Tables 1, 2 and 3, respectively. If someone used the same keyword more than once, then I only counted it one time per respondent. I did mention in the survey that I use ASTM E 1049-85, section 5.4.4, for time domain rainflow counting. I then feed the results into the Miner’s cumulative damage summation. And also that I use the Dirlik, Single Moment, and similar spectral moment-derived methods for frequency domain fatigue calculations. So some engineers replied that they use the same methods. In addition, I have recorded their responses in Appendix A, minus their names and company. The respondents represent both U.S. and Europe. They are also from a number of industries including aerospace, automotive, wind power, nuclear energy, offshore, etc. Results Table 1. Software Programs Code Respondents Nasgro (fracture) 8 nCode 8 Unspecified Nastran 5 Ansys 4 Fe safe 4 MSC Nastran 3 ABAQUS 3 Patran 2 Femap 2 NX Nastran 2 Autodesk Nastran 1 Comsol Multiphysics 1 FEMFAT 1 WAFO 1 Matlab 1
fatigue_survey_revA.docx