Energy-based approach for fatigue life prediction of pure copper

Wang, X.G.; Crupi, Vincenzo; Jiang, Chao; Feng, Ensheng; Guglielmino, Eugenio; Wang, C.S.

doi:10.1016/j.ijfatigue.2017.07.025

Cited by 44 publications

(30 citation statements)

References 39 publications

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“…Most of the dissipated energy during the fatigue process is released in the form of thermal energy, causing changes in the temperature of the material's surface even in the case of metallic materials showing a good thermal conductivity. Numerous experiments 5,7,[19][20][21][24][25][26][27][28][29][30][31] have proven that three stages of temperature evolution of a specimen or a component can be observed if the load amplitude is above the fatigue limit where plasticity becomes a lifetime limiting factor: an initial temperature increase stage (stage I), a predominant temperature stabilized stage (stage II), and a sudden temperature increase stage before fracture (stage III), which is schematically presented in Figure 1. Among those three stages, stage II occupies about 90% of the fatigue life for many ironcarbon alloys.…”

Section: Thermodynamic Frameworkmentioning

confidence: 99%

“…Connesson et al 17,18 investigated the materials' microstructure evolution based on the cumulated plastic strain and the dissipated energy due to the internal friction, and they proposed an improved model to describe the energy balance during the very first cycles at low stress levels. Wang et al 19,20 proposed an effective method to evaluate an S-N curve by using a thermal parameter, which is determined from the dissipation rate as a characteristic measure of fatigue resistance. Guo et al 21,22 introduced an intrinsic dissipated fatigue life prediction model for HCF based on the energy method as fatigue damage evolution is an energy dissipation process accompanied with temperature variation.…”

Section: Introductionmentioning

confidence: 99%

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Thermography in high cycle fatigue short‐term evaluation procedures applied to a medium carbon steel

Teng

Boller

et al. 2019

Fatigue Fract Eng Mat Struct

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This paper focuses on the fatigue life calculation for an unalloyed medium carbon steel SAE1045 (German DIN-standard: C45E), by applying an energy dissipation-based approach quantified through thermographic measurements. The purpose of this approach is to establish an intrinsic dissipation model and to predict characteristics derived from the cyclic deformation behavior of stress-controlled fatigue tests, eg, the fatigue limit and the S-N data by using simplified (zero-dimensional, 0D) thermodynamic equations. In order to investigate the possibilities for a rapid evaluation while simultaneously reducing the experimental effort, one load increase test (LIT) and two constant amplitude tests (CATs) were carried out. The S-N data evaluated on such a basis is competitive to conventionally determined S-N data as will be shown. K E Y W O R D Sfatigue life evaluation, intrinsic dissipation, medium carbon steel, thermography

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Section: Thermodynamic Frameworkmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Thermography in high cycle fatigue short‐term evaluation procedures applied to a medium carbon steel

Teng

Boller

et al. 2019

Fatigue Fract Eng Mat Struct

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“…Wang et al [28] presented that the temperature increment θ in stage II could be converted into the asymptotic portion of temperature increase θ AS and the incremental temperature θ ∆ . It should be noted that the incremental temperature θ ∆ represents the increased temperature with respect to the asymptotic portion of temperature increase θ AS during the stabilized stage II.…”

Section: Energy-based Fatigue Life Modelmentioning

confidence: 99%

An Energy-Based Approach for Fatigue Life Estimation of Welded Joints without Residual Stress through Thermal-Graphic Measurement

Xiao

et al. 2019

Applied Sciences

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The traditional methodologies for fatigue life assessment of welded joints strongly depend on geometries and surface characteristics, as well as time. In this paper, an energy-based approach, independent of structures though thermal-graphic measurement, was presented to predict life expectancy of welded joints, via limited number of tests. In order to eliminate the thermal elastic effect caused by the welding residual stress, annealing was first conducted on welded specimens. Both monotonic and cyclic tests for welded joints were implemented. Then, based on the thermal evolution of welded joints measured by the quantitative thermo-graphic method, an energy-based approach, taking the linear temperature evolution and the intrinsic dissipation into account, was employed on the fatigue life prediction of flat butt-welded joints. The estimated results showed good agreement with the experimental ones, and the energy tolerance to failure E c for different stress amplitudes was found to be constant.

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“…The reader is referred to Delpueyo et al for a list of references in which the 0D approach is employed. This list can be updated with Wang et al dedicated to pure copper, Le Cam dedicated to rubber, and Corvec et al dedicated to different types of leathers. The present study analyses the error generated by the 0D approach in the assessment of mechanical dissipation due to fatigue loading.…”

Section: Introductionmentioning

confidence: 99%

Comparison between 0D and 1D approaches for mechanical dissipation measurement during fatigue tests

Jongchansitto

Douellou

Preechawuttipong

et al. 2019

Strain

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Fatigue in materials is generally associated with the production of heat, leading to the “self‐heating” of the tested material. The associated heat power density, named mechanical dissipation or intrinsic dissipation, can be deduced from the temperature changes captured on the tested specimen's surface by infrared thermography. When mechanical dissipation is spatially homogeneous in the tested specimen, the processing can be performed using a macroscopic approach, also named zero‐dimensional (0D) approach. The latter uses an averaged temperature over the whole specimen's measurement zone. The present study aims to analyse the error generated by the 0D approach in the assessment of mechanical dissipation. This error was measured with respect to a one‐dimensional (1D) approach, which is applicable for longitudinal specimens subjected to uniaxial loading. Experimental tests were performed on pure copper and acrylic glass. A model was also developed to analyse the influence of the material and of the heat exchanges with the specimen's environment. The results obtained show that the error generated by the 0D approach in mechanical dissipation measurement may not be negligible and that attention should be paid to the choice of approach for fatigue analysis.

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Energy-based approach for fatigue life prediction of pure copper

Cited by 44 publications

References 39 publications

Thermography in high cycle fatigue short‐term evaluation procedures applied to a medium carbon steel

Thermography in high cycle fatigue short‐term evaluation procedures applied to a medium carbon steel

An Energy-Based Approach for Fatigue Life Estimation of Welded Joints without Residual Stress through Thermal-Graphic Measurement

Comparison between 0D and 1D approaches for mechanical dissipation measurement during fatigue tests

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