An analysis of metal fatigue based on hysteresis energy

Chang, Che‐Wei; Pimbley, W. T.; Conway, H. D.

doi:10.1007/bf02326108

Cited by 49 publications

(34 citation statements)

References 9 publications

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“…In addition to the above, the hysteresis loops during the cyclic loading contains anelastic and plastic effects. It was shown that the anelastic portion of hysteresis loop has little or no effect on the micro-structure of a material [23]. Hence, it has a negligible contribution to the actual structural damage.…”

Section: Plastic Strain Energymentioning

confidence: 99%

An Energy Based Fatigue Life Prediction Framework for In-Service Structural Components

et al. 2010

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An energy based fatigue life prediction framework has been developed for calculation of remaining fatigue life of in service gas turbine materials. The purpose of the life prediction framework is to account aging effect caused by cyclic loadings on fatigue strength of gas turbine engines structural components which are usually designed for very long life. Previous studies indicate the total strain energy dissipated during a monotonic fracture process and a cyclic process is a material property that can be determined by measuring the area underneath the monotonic true stress-strain curve and the sum of the area within each hysteresis loop in the cyclic process, respectively. The energy-based fatigue life prediction framework consists of the following entities: (1) development of a testing procedure to achieve plastic energy dissipation per life cycle and (2) incorporation of an energy-based fatigue life calculation scheme to determine the remaining fatigue life of in-service gas turbine materials. The accuracy of the remaining fatigue life prediction method was verified by comparison between model approximation and experimental results of Aluminum 6061-T6. The comparison shows promising agreement, thus validating the capability of the framework to produce accurate fatigue life prediction.

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Section: Plastic Strain Energymentioning

confidence: 99%

An Energy Based Fatigue Life Prediction Framework for In-Service Structural Components

et al. 2010

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“…Thus, work dissipated as heat would not contribute to the nucleation, multiplication, and accumulation of dislocations, and the evolution of dislocation structures associated with damage. In addition, materials subject to an endurance limit will obviously disseminate an increasing fraction of the overall work without doing damage as amplitudes are reduced [2], [3]. Chang et al [3] showed how accounting for this would allow for scaling of results for steel up to tens of millions of cycles.…”

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confidence: 99%

Correlation Between Solder Joint Fatigue Life and Accumulated Work in Isothermal Cycling

Hamasha

Qasaimeh

Jaradat

et al. 2015

IEEE Trans. Compon., Packag. Manufact. Technol.

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The fatigue behavior of solder joints in realistic service applications is still not well understood. Service life prediction based on conducting accelerated tests and extrapolating test results therefore involves a high potential for error. Understanding both the evolution of solder joint properties and the damage accumulation has proved to be critical to reliability modeling. Damage accumulation in isothermal cycling is shown to scale with the accumulated inelastic work even in complex cycling scenarios, so that the life of a solder joint ends upon accumulation of a given amount of work. Individual ball grid array solder joints were cycled in shear fatigue experiments with different load amplitudes and strain rates. The effects of load amplitudes and strain rates on the work accumulation and fatigue life were systematically addressed. The correlation between different loading scenarios and the accumulated work to failure was also discussed. The results showed that the accumulated work until the development of a major crack is constant regardless of the load amplitude. After that the accumulated work to failure is lower for larger load amplitudes. For some reason, a larger fraction of the work appears to be dissipating as heat at lower load amplitude, but only during crack growth. On the other hand, the strain rate affects the fraction of the work going to heat even before the development of a major crack.

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“…In fact, models sharing similar ideas have been proposed since the 1920s [33], and gradually formed corresponding modeling systems [34][35][36][37][38][39][40][41][42][43][44][45][46]. Typical achievements including the well-known Smith, Watson and Topper (SWT) model proposed in 1970 [37], which first considered the influence of the average stress.…”

Section: Model and Analysismentioning

confidence: 99%

Extremely-low-cycle fatigue behaviors of Cu and Cu–Al alloys: Damage mechanisms and life prediction

et al. 2015

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An analysis of metal fatigue based on hysteresis energy

Cited by 49 publications

References 9 publications

An Energy Based Fatigue Life Prediction Framework for In-Service Structural Components

An Energy Based Fatigue Life Prediction Framework for In-Service Structural Components

Correlation Between Solder Joint Fatigue Life and Accumulated Work in Isothermal Cycling

Extremely-low-cycle fatigue behaviors of Cu and Cu–Al alloys: Damage mechanisms and life prediction

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