Uninterrupted and accelerated vibrational fatigue testing with simultaneous monitoring of the natural frequency and damping

Česnik, Martin; Slavič, Janko; Boltežar, Miha

doi:10.1016/j.jsv.2012.06.022

Cited by 63 publications

(48 citation statements)

References 30 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…When the fatigue parameters are known one can predict the fatigue life of the structure exposed to a random-signal vibrational load using the power spectral density of the structure's stress response, [10] and [11]. Recently, several research studies have been done in the area of the vibrational fatigue under a random base-excitation.…”

Section: Introductionmentioning

confidence: 99%

Vibrational Fatigue and Structural Dynamics for Harmonic and Random Loads

Česnik

Slavič

2015

SV-JME

Self Cite

View full text Add to dashboard Cite

Section: Introductionmentioning

confidence: 99%

Vibrational Fatigue and Structural Dynamics for Harmonic and Random Loads

Česnik

Slavič

2015

SV-JME

Self Cite

View full text Add to dashboard Cite

“…They were replicated as base excitation to induce on the specimen a certain fatigue damage. Due to both the signal and specimen characteristics, failure breakdown was not achievable (in a reasonable time) so that a "conventional Time-to-Failure", cTTF, was introduced considering the effect of accumulated fatigue damage to decrease the specimen natural frequency [6,7]. In particular, cTTF is here defined as the time necessary to decrease the specimen natural frequency from the value = 32.67 Hz to the final value = 31.04 Hz (5 % decrement).…”

Section: Test Proceduresmentioning

confidence: 99%

Experimental HALTs with sine-on-random synthesized profiles

Troncossi¹,

Rivola²

2017

Vib. proced.

View full text Add to dashboard Cite

Abstract. In several applications, certain components must be designed to withstand the fatigue damage induced by dynamic loads due to vibrations. Highly Accelerated Life Tests (HALTs) by means of vibration qualification can be performed for the most critical ones. The proper synthesis of test profiles, which starts from the real environment vibrations and which preserves both the fatigue damage potential and the signal characteristics of the excitation, is important to obtain reliable results. A special kind of vibration excitation is the so-called Sine-on-Random (SoR), i.e. sinusoidal contributions superimposed to random vibrations, particularly significant for systems where rotating parts are present. A methodology was previously proposed to synthesize SoR test profiles for HALTs, starting from reference measured vibrations. The present paper illustrates the experimental campaign carried out to verify the effectiveness and the accuracy of the proposed method.

show abstract

“…The parameters used are the S-N curve slope and its intercept at 1 cycle. The methodology for obtaining these parameters relatively quickly was proposed byČesnik et al [27,28]. The probability density function (PDF) of the stress peaks ( ) describes the statistical variability of the stress peaks and is often presented as the curve over the histogram of the event distribution.…”

Section: Calculation Of Vibration-fatigue Damagementioning

confidence: 99%

Fatigue Damage for Sweep-Sine and Random Accelerated Vibration Testing

Kos¹,

Slavič

Boltežar

2014

Advances in Mechanical Engineering

Self Cite

View full text Add to dashboard Cite

The vibration testing of components in the automotive industry requires long testing times and the use of expensive facilities. To shorten these testing times an accelerated vibration-testing approach is usually applied. This research tries to shorten these testing times by considering the parameters that define vibration-testing techniques. With special attention to the excitation types sweepsine and random, a damage-based approach is applied. The phenomenon of fatigue damage is closely observed from the frequencydomain point of view but also by considering the relationship between the time and the frequency domains. The Palmgren-Miner cumulative rule is applied to calculate the fatigue life. Two case studies of measured responses are used to compare the times to failure. The results show that proposed predictions can be used to compare different testing techniques, but they are not so accurate when predicting the actual times to failure.

show abstract

Uninterrupted and accelerated vibrational fatigue testing with simultaneous monitoring of the natural frequency and damping

Cited by 63 publications

References 30 publications

Vibrational Fatigue and Structural Dynamics for Harmonic and Random Loads

Vibrational Fatigue and Structural Dynamics for Harmonic and Random Loads

Experimental HALTs with sine-on-random synthesized profiles

Fatigue Damage for Sweep-Sine and Random Accelerated Vibration Testing

Contact Info

Product

Resources

About