Influences of correlations between biaxial random vibrations on the fatigue lives of notched metallic specimens
Source abstract
Abstract
Abstract In the study, a hybrid frequency-time method is proposed to estimate the fatigue lives of notched metallic specimens under multiaxial random vibrations with different correlations. Firstly, a testing structure is designed and the biaxial random vibration fatigue tests are conducted to study the influences of correlations between two vibration axes on the fatigue lives of the notched specimens. Then, the crack initiation point of the notched specimen is determined by the random vibration analysis with the finite element method (FEM). And the fatigue critical point is determined through the crack initiation point and the point method of the theory of critical distance (TCD). The stress time histories at the fatigue critical point are generated from the stress power spectral density (PSD) matrix by the time domain randomization approach. Finally, the fatigue life estimation is performed by the modified Wohler curve method (MWCM) at the fatigue critical point. The results show that all the estimated fatigue lives are within the three-time scatter band of the experimental fatigue lives.
Source: openaire · Quality: candidate unverified · Source record ↗
Research context
OpenAlex topics: Fatigue and fracture mechanics · Structural Health Monitoring Techniques · Structural Load-Bearing Analysis
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
References (39)
Show source-provided references
1. Vibro-acoustic analysis under stationary and non-stationary random excitations with KLE/FEM/BEM10.1016/j.ast.2017.03.011 ↗
2. Crandall · 2014
3. A notch critical plane approach of multiaxial fatigue life prediction for metallic notched specimens10.1111/ffe.12956 ↗
4. Vibration fatigue analysis and multi-axial effect in testing of aerospace structures10.1016/j.ymssp.2008.08.006 ↗
5. Frequency-domain methods for a vibration-fatigue-life estimation–Application to real data10.1016/j.ijfatigue.2012.07.005 ↗
6. Multiaxial vibration fatigue—A theoretical and experimental comparison10.1016/j.ymssp.2016.02.012 ↗
7. A hybrid frequency–time domain method for predicting multiaxial fatigue life of 7075–T6 aluminum alloy under random loading10.1111/ffe.12224 ↗
8. Fatigue behavior and influence factor analysis of the structure subject to multiaxial random loading
9. Two time domain models for fatigue life prediction under multiaxial random vibrations10.1177/0954406219827038 ↗
10. A damage model based on the critical plane to estimate fatigue life under multi-axial random loading10.1016/j.ijfatigue.2018.06.025 ↗
11. Theoretical and numerical investigation of stress mode shapes in multi-axial random fatigue10.1016/j.ymssp.2019.03.015 ↗
12. A frequency domain method for the generation of partially coherent normal stationary time domain signals10.1155/1993/537658 ↗
13. Matrix power control algorithm for multi-input multi-output random vibration test10.1016/S1000-9361(11)60087-3 ↗
14. Analysis of low damping ratios in multi-exciter stationary non-Gaussian random vibration control10.1177/1077546319898561 ↗
15. Random multiaxial fatigue: a comparative analysis among selected frequency and time domain fatigue evaluation methods10.1016/j.ijfatigue.2015.01.003 ↗
16. A review of multiaxial fatigue criteria for random variable amplitude loads10.1111/ffe.12619 ↗
17. Recent developments in frequency domain multi-axial fatigue analysis10.1016/j.ijfatigue.2016.04.012 ↗
18. Fatigue life calculation by means of the cycle counting and spectral methods under multiaxial random loading10.1111/j.1460-2695.2005.00877.x ↗
19. Nieslony · 2007
20. Reformulation in the frequency domain of a critical plane-based multiaxial fatigue criterion10.1016/j.ijfatigue.2014.01.008 ↗
21. The theory of critical distances10.1016/j.engfracmech.2007.04.007 ↗
22. The theory of critical distances: a review of its applications in fatigue10.1016/j.engfracmech.2006.12.004 ↗
23. The Theory of Critical Distances to estimate lifetime of notched components subjected to variable amplitude uniaxial fatigue loading10.1016/j.ijfatigue.2011.01.012 ↗
24. Neuber · 1961
25. Notch sensitivity
26. Engineering formulae for fatigue strength reduction due to crack-like notches10.1007/BF00942722 ↗
27. Geometrical effects in fatigue: a unifying theoretical model10.1016/S0142-1123(99)00007-9 ↗
28. Prediction of non propagating cracks10.1016/0013-7944(79)90081-X ↗
29. A critical distance/plane method to estimate finite life of notched components under variable amplitude uniaxial/multiaxial fatigue loading10.1016/j.ijfatigue.2011.11.015 ↗
30. The theory of critical distances to estimate finite lifetime of notched components subjected to constant and variable amplitude torsional loading10.1016/j.engfracmech.2012.12.007 ↗
31. An innovative system for uncoupled bending/torsion tests by tri-axis shaker: numerical simulations and experimental results[C]//MATEC Web of Conferences
32. Newland · 1984
33. Time-domain approach for multi-exciter random environment test10.1016/j.jsv.2017.03.008 ↗
34. A simple and efficient numerical algorithm to determine the orientation of the critical plane in multiaxial fatigue problems10.1016/j.ijfatigue.2010.05.004 ↗
35. Fatigue testing under variable amplitude loading10.1016/j.ijfatigue.2006.10.011 ↗
36. J integral applications for short fatigue cracks at notches10.1007/BF00042383 ↗
37. Zhang CC. Fatigue life prediction of structures in HCF region under complex stress field, Nanjing University of Aeronautics and Astronautics Ph.D. Thesis, 2010, 11–17 [in Chinese].
38. Influence of notch geometry on the estimation of the stress intensity factor threshold by considering the Theory of Critical Distances10.1016/j.ijfatigue.2011.11.020 ↗
39. Effect of resonant frequency shifting on time to failure of a cantilevered beam under vibration10.17764/jiet.53.1.167m8136u6514056 ↗