Fatigue Damage
著者
書誌事項
Fatigue Damage
（Mechanical vibration & shock / Christian Lalanne, v.4）
Penton, 2002
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注記
Includes bibliography and index.
内容説明・目次
内容説明
Fatigue damage in a system with one degree of freedom is one of the two criteria applied for the comparison of severity of many vibratory environments. This criterion is also employed for a specification representing the effects produced by the set of vibrations imposed in useful life. In this volume, which is devoted to the calculation of fatigue damage, the hypotheses adopted to describe the behaviour of material suffering fatigue and the laws of fatigue accumulation are explored. Also considered are the methods of counting the response peaks, which are used to establish the histogram when it is impossible to use the probability density of the peaks obtained with a gaussian signal. The expressions for means damage and its standard deviation are established, and other hypotheses tested.
目次
- Chapter 1. Response of a linear system with single degree of freedom to a random vibration Average value of response of linear system
- Response of filter perfect band pass to a random vibration
- DSP of response of linear system with one degree of freedom
- Effective value of response to white noise
- Effective value of response of linear system with one degree of freedom subjected to bands of random noise Effective value of absolute acceleration of the response
- Transitory response of a dynamic system under stationary random excitation Transitory response of a dynamic system under nonstationary random excitation consisting of noise modulated in amplitude Chapter 2. Properties of the response of a linear system with one degree of freedom to random vibration Moments of the response of a linear system to a degree of freedom - factor of irregularity of response Autocorrelation function of displacement response
- Mean number of maxima and minima a second
- Equivalence between transfer functions of a filter band pass and a linear system to a degree of freedom Chapter 3. Concepts of material fatigue Introduction
- Fatigue damage
- Characterization of endurance of materials
- Factors of influence
- Other representations of Wohler curves
- Prediction of lifespan of complex structures
- Composite material fatigue Chapter 4. Accumulation of damage by fatigue Evolution of damage by fatigue
- Classification of the various laws of accumulation
- Milner method
- Modified Milner theory
- Henry method
- Modified Henry method
- H. Corten and T Dolan method
- Other theories Chapter 5. Methods of counting peaks of a random vibration General
- Counting of peaks
- Counting of extremes between two passages using average value
- Counting of fields
- Counting of field-averages
- Counting of fields per pair
- Beam method of counting
- Motor-racing track method of counting
- Counting of crossings of thresholds
- PVP method
- Fatiguemeter method
- Counting of extensions in cascade
- NRL method
- Counting of maintenance times at a given level
- Influence levels of load below the limit of endurance over the lifespan
- Acceleration of the test
- Presentation of the curves of random fatigue Chapter 6. Damage by fatigue exhibited by a mechanical system with a degree of freedom Introduction
- Calculation of the damage by fatigue started by time signal
- Calculation of damage from fatigue initiated by a spectral concentration of acceleration
- Noise with narrow band equivalent
- Comparison of Wohler curves established under sinusoidal loads and random loadings
- Comparison of theory and experiment
- Influence of form of spectral concentration of power and value of the irregularity factor
- Effects of truncation of peaks
- Truncation of peaks of stress Chapter 7. Standard deviation of damage by fatigue Calculation of the standard deviation of the damage according to the J.S. Bendat method
- Calculation of the standard deviation of the damage according to S.H. Crandall, W.D. Mark and G.R. Khabbaz method
- Comparison of the results of W.D. Mark and J.S. Bendat
- Wohler statistical curves. Chapter 8. Damage by fatigue: other design assumptions Wohler curve is comparable with two segments of straight line in axes
- log-log (taken into account of a limit of endurance) Wohler curve is comparable with two segments of straight line in axes
- log-flax Assumptions of a nonlinear cumulative damage
- Random vibration with nonnull average - Use of modified Goodman diagram
- NonGaussian distribution of the instantaneous values
- Nonlinear mechanical system Principal notations - Bibliography - Index
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