Thermographic methodology for rapid determination of the fatigue limit of materials and mechanical components

Rosa, Guido La; Risitano, Giacomo

doi:10.1016/s0142-1123(99)00088-2

Cited by 586 publications

(570 citation statements)

References 8 publications

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“…The measurements performed are summarized in Table 3. Applying the procedure suggested by [8] to the higher frequency, a fatigue limit of ∆σ 0 ∼ = 400 MPa is estimated (see Figure 5), which differs notably from the value found in the analytical method for the true fatigue limit, namely, ∆σ 0 = 188.40 MPa. The estimation for the lower frequency yields even higher values, and will be handled in Section 5.…”

Section: Application Of Thermography To Estimation Of the Fatigue Limitmentioning

confidence: 70%

“…Using the 5-parameter Weibull regression model of [2], a probabilistic definition of the ε − N field is achieved allowing us to define analytically the fatigue limit for the carbon steel C55E, which can be converted to the fatigue limit in terms of stress, and compared subsequently with the value found using the thermographic method proposed by [8].…”

Section: Discussionmentioning

confidence: 99%

“…The thermographic method known after Risitano (see [8]) is based on the empirical observation of the temperature increase of a specimen subjected to fatigue loading. According to this method, the fatigue limit can be identified as the maximum value of the stress range that does not induce measurable damage, i.e., a rise of temperature.…”

Section: Application Of Thermography To Estimation Of the Fatigue Limitmentioning

confidence: 99%

“…As soon as the stress range applied exceeds the fatigue limit, the temperature evolves exhibiting a noticeable change and the plot becomes steeper as a function of the stress range. According to those authors, the simple construction of Figure 4: Linear approximation of the infrared thermal detection for determining the fatigue limit ∆σ 0 ≈ 400 MPa) of a carbon steel C55E according to [8].…”

Section: Application Of Thermography To Estimation Of the Fatigue Limitmentioning

confidence: 99%

“…Since the early contribution of [3] a number of researches has been devoted to the study of the rapid estimation of high cycle fatigue properties, particularly using the temperature changes during cyclic loading (see [4] and [5]). In particular, the thermographic technique( [6], [7], [8] and [9]) can be advantageously considered for the estimation of the fatigue limit with a notable reduction of the experimental programme. In this work, an experimental fatigue program under strain control on C55E steel is performed aiming at investigating the reliability of the Risitano thermographic method in practical applications.…”

Section: Introductionmentioning

confidence: 99%

See 4 more Smart Citations

Maximum likelihood estimation for the three-parameter Weibull cdf of strength in presence of concurrent flaw populations

Przybilla¹,

Fernández‐Canteli²,

Castillo³

2013

Journal of the European Ceramic Society

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The determination of the ε − N field for a certain material, similar to the S − N case implies a relatively high number of costly and time consuming fatigue tests at different strain amplitudes. For specific applications, the mere estimation of the fatigue limit seems to be sufficient for guaranteeing lifetime safety in fatigue design allowing practical methods to be advantageously applied as a result of the notable reduction of the experimental program implied. In this work, the reliability of the fatigue limit provided by the Risitano thermographic method is investigated in order to check its validity for practical applications. With this aim, an experimental program on a C55E steel under strain control is performed, from which the probabilistic ε − N field is assessed using the Weibull regression model of Castillo et al., which provides a global solution in both low-and long-cycle fatigue regions. The fatigue limit is derived, primarily as stress range and then compared with that resulting from the Risitano methodology. With the purpose of improving the estimation of the fatigue limit, a novel assessment procedure of the thermographic results is presented that allows an improved correspondence between the fatigue limits arising from both models, thus confirming the suitability of the thermographic technique in practical applications.

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Section: Application Of Thermography To Estimation Of the Fatigue Limitmentioning

confidence: 70%

Section: Discussionmentioning

confidence: 99%

Section: Application Of Thermography To Estimation Of the Fatigue Limitmentioning

confidence: 99%

Section: Application Of Thermography To Estimation Of the Fatigue Limitmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Maximum likelihood estimation for the three-parameter Weibull cdf of strength in presence of concurrent flaw populations

Przybilla¹,

Fernández‐Canteli²,

Castillo³

2013

Journal of the European Ceramic Society

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Thermography Assisted Fatigue Testing

Saigal

Marchi

et al. 2012

Characterization of Minerals, Metals, and Materials

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Preparation and physico‐mechanical, thermal and acoustic properties of flexible polyurethane foams based on hydroxytelechelic natural rubber

Saetung

Rungvichaniwat

Campistron

et al. 2010

J of Applied Polymer Sci

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Novel flexible polyurethane foams were successfully prepared from a renewable source, hydroxytelechelic natural rubber (HTNR) having different molecular weights (1000-3400 g mol À1 ) and variation of epoxide contents (EHTNR, 0-35% epoxidation) by a one-shot technique. The chemical and cell structures as well as physico-mechanical, thermal, and acoustic properties were characterized and compared with commercial polyol analogs. The obtained HTNR based foams are open cell structures with cell dimensions between 0.38 and 0.47 mm. The HTNR1000 based foam exhibits better mechanical properties but lower elongation at break than those of commercial polyol analog.However, the HTNR3400 based foam shows the best elastic properties. In a series of EHTNR based foams, the tensile and compressive strengths show a tendency to increase with increasing epoxide content and amount of 1,4-butanediol (BD). The HTNR based foams demonstrate better low temperature flexibility than that of the foam based on commercial polyol. Moreover, the HTNR based polyurethane foams was found to be an excellent absorber of acoustics.

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Thermographic methodology for rapid determination of the fatigue limit of materials and mechanical components

Cited by 586 publications

References 8 publications

Maximum likelihood estimation for the three-parameter Weibull cdf of strength in presence of concurrent flaw populations

Maximum likelihood estimation for the three-parameter Weibull cdf of strength in presence of concurrent flaw populations

Thermography Assisted Fatigue Testing

Preparation and physico‐mechanical, thermal and acoustic properties of flexible polyurethane foams based on hydroxytelechelic natural rubber

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