Topic
Vibration fatigue
About: Vibration fatigue is a research topic. Over the lifetime, 3460 publications have been published within this topic receiving 46297 citations.
Papers published on a yearly basis
Papers
More filters
••
TL;DR: In this article, an algorithm for fatigue life estimation of the elements with circumferential notch under uniaxial cyclic tension and compression was proposed, where energy models were used for local strain and stress calculation at the notch where the complex state of stress exists.
19 citations
••
TL;DR: In this paper, a technique for prediction of low-cycle fatigue behavior under bending conditions from the knowledge of uniaxial fatigue data is presented for beams with both rectangular and circular cross-sections.
Abstract: — A technique is presented for prediction of low-cycle fatigue behaviour under bending conditions from the knowledge of uniaxial fatigue data. The technique utilizes the reference stress approach used in the analysis of creeping components. The results enable determination of nominal elastic bending stress in terms of the observed saturation stress amplitude in an uniaxial fatigue test conducted at a reference value of strain amplitude. The reference parameters are determined for beams with both rectangular and circular cross-sections. The predictions of fatigue bending behaviour are in excellent agreement with closed form solutions reported recently. The merits of this alternative approach lie in its potential applicability to other structural situations once their reference uniaxial parameters are determined. Since the reference parameters are nearly the same for both creep and fatigue, the approach can be a useful experimental tool for relating creep-fatigue interaction effects in structural components with uniaxial creep-fatigue tests conducted under the reference conditions.
19 citations
•
01 Jan 1971TL;DR: In this article, the authors investigated the effect of curvature damage on a single degree-of-freedom STEEL SEISMIC Structure in the presence of a single generator and found that curvature was significant in STRUCTURES HAVING VARIED STRENGTH FACTORS and PERIODS of strain and stress.
Abstract: THE VIABILITY OF CUMULATIVE FATIGUE DAMAGE AS A DESIGN CRITERION FOR SINGLE DEGREE-OF-FREEDOM STEEL SEISMIC STRUCTURES IS INVESTIGATED. TWO ENSEMBLES OF EARTHQUAKE ACCELERATION RECORDS ARE GENERATED AND USED AS EXCITATION INPUT IN SIMULATIONS INVOLVING STRUCTURES HAVING VARIED STRENGTH FACTORS AND PERIODS OF VIBRATION STRAIN AND STRESS HISTORIES ARE OBTAINED FOR THE EXTREME FIBERS OF CRITICAL SECTIONS OF THE STRUCTURES. THESE ARE EVALUATED FOR CUMULATIVE FATIGUE DAMAGE BY A MODEL WHICH INCORPORATES THE RAIN FLOW CYCLE COUNTING METHOD, A FACTOR TO ACCOUNT FOR THE MEAN STRESS OF EACH STRAIN REVERSAL AND AN EMPIRICAL ADJUSTMENT TO THE STRAIN-FATIGUE LIFE FUNCTION TO ACCOUNT FOR THE SEQUENCE EFFECT OF THE STRAIN HISTORIES. FATIGUE DAMAGE IS FOUND TO BE SIGNIFICANT IN STRUCTURES HAVING PERIODS OF VIBRATION AT THE LOWER END OF THE MEDIUM PERIOD RANGE OF THE DESIGN EARTHQUAKE SPECTRA. THE DAMAGE MAY BE ESTIMATED FROM A HYSTERETIC ENERGY PARAMETER PERTAINING TO THE CRITICAL SECTION OF THE FRAME. /ASCE/
19 citations
••
TL;DR: In this paper, the authors proposed a hybrid vibration absorber (HVA) which is optimized to suppress resonant vibration of a single degree-of-freedom (SDOF) system is re-optimized for suppressing wide frequency band vibration of the system under stationary random force excitation.
19 citations
•
07 Jan 2015
TL;DR: In this paper, a vibration fatigue life predication method and system for a micro-packaging assembly is presented, which comprises the following steps: creating a vibration simulating finite element model according to the structures of the micro-packing assembly and a fixing part; extracting the verification characteristics parameters; modifying the vibration simulated finite element models according to verification characteristics and the experimental characteristics parameters of the assembly; performing random vibration stress response simulation analysis; extracting equivalent stress power spectrum density of the dangerous vibration fatigue point under the random vibration load; converting the equivalent stress spectrum density to obtain cyclic
Abstract: The invention provides a vibration fatigue life predication method and system for a micro-packaging assembly. The method comprises the following steps: creating a vibration simulating finite element model according to the structures of the micro-packaging assembly and a fixing part; extracting the verification characteristics parameters; modifying the vibration simulating finite element model according to the verification characteristics parameters and the experimental characteristics parameters of the micro-packaging assembly to obtain a vibration simulating model; performing random vibration stress response simulation analysis for the micro-packaging assembly according to the vibration simulation model to obtain a dangerous vibration fatigue point; extracting equivalent stress power spectrum density of the dangerous vibration fatigue point under the random vibration load; converting the equivalent stress power spectrum density to obtain cyclic stress time domain data; calculating the vibration fatigue life of the dangerous vibration fatigue point under the random vibration load according to an S-N curve and the cyclic stress time domain data of the dangerous vibration fatigue point; predicating the vibration fatigue life of the micro-packaging assembly by the method of synchronously extracting the response data of the fixing part and the micro-packaging assembly. With the adoption of the method and system, the testing accuracy is improved.
19 citations