Rapid determination of the fatigue curve by the thermographic method

Fargione, G.; Geraci, Alberto L.; Rosa, Guido La; Risitano, Giacomo

doi:10.1016/s0142-1123(01)00107-4

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“…Ɇɟɬɨɞ ɢɧɮɪɚɤɪɚɫɧɨɣ ɬɟɪɦɨɝɪɚɮɢɢ ɲɢɪɨɤɨ ɩɪɢɦɟɧɹɟɬɫɹ ɩɪɢ ɩɪɨɜɟɞɟɧɢɢ ɦɟɯɚɧɢɱɟɫ-ɤɢɯ ɢɫɫɥɟɞɨɜɚɧɢɣ ɫ ɰɟɥɶɸ ɩɨɥɭɱɟɧɢɹ ɞɟɬɚɥɶɧɨɣ ɢɧɮɨɪɦɚɰɢɢ ɨ ɡɚɤɨɧɨɦɟɪɧɨɫɬɹɯ ɧɚɤɨɩ-ɥɟɧɢɹ ɷɧɟɪɝɢɢ ɜ ɩɪɨɰɟɫɫɟ ɞɟɮɨɪɦɢɪɨɜɚɧɢɹ ɦɟɬɚɥɥɨɜ [6][7][8][9][10]. Ɋɚɧɟɟ ɢɫɫɥɟɞɨɜɚɧɢɹ ɫ ɩɨɦɨɳɶɸ ɬɟɪɦɨɝɪɚɮɢɢ ɨɫɭɳɟɫɬɜɥɹɥɢɫɶ ɧɚ ɨɞɧɨɪɨɞɧɵɯ ɦɚɬɟɪɢɚɥɚɯ, ɧɨ ɫ ɪɚɡɜɢɬɢɟɦ ɬɟɯ-ɧɨɥɨɝɢɣ ɢ ɩɨɹɜɥɟɧɢɟɦ ɫɨɜɪɟɦɟɧɧɨɝɨ ɨɛɨɪɭɞɨɜɚɧɢɹ ɷɬɨɬ ɦɟɬɨɞ ɛɵɥ ɩɪɢɦɟɧɟɧ ɬɚɤɠɟ ɤ ɤɨɦɩɨɡɢɬɚɦ [11][12][13].…”

Section: © ɉɇɂɉɍunclassified

Experimental Investigation of Defects Influence on Composites Sandwich Panels Strength Using Digital Image Correlation and Infrared Thermography Methods

et al. 2015

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Ʌɨɛɚɧɨɜ Ⱦ.ɋ., ȼɢɥɶɞɟɦɚɧ ȼ.ɗ., ɋɩɚɫɤɨɜɚ ȿ.Ɇ., ɑɢɯɚɱɟɜ Ⱥ.ɂ. ɗɤɫɩɟɪɢɦɟɧɬɚɥɶɧɨɟ ɢɫɫɥɟɞɨɜɚɧɢɟ ɜɥɢɹɧɢɹ ɞɟɮɟɤɬɨɜ ɧɚ ɩɪɨɱɧɨɫɬɶ ɤɨɦɩɨɡɢɬɧɵɯ ɩɚɧɟɥɟɣ ɦɟɬɨɞɚɦɢ ɤɨɪɪɟɥɹɰɢɢ ɰɢɮɪɨɜɵɯ ɢɡɨɛɪɚɠɟɧɢɣ ɢ ɢɧɮɪɚɤɪɚɫɧɨɣ ɬɟɪɦɨɝɪɚɮɢɢ // ȼɟɫɬɧɢɤ ɉɟɪɦɫɤɨɝɨ ɧɚɰɢɨɧɚɥɶɧɨɝɨ ɢɫɫɥɟɞɨɜɚɬɟɥɶɫɤɨɝɨ ɩɨɥɢɬɟɯɧɢɱɟɫɤɨɝɨ ɭɧɢɜɟɪɫɢɬɟɬɚ. Ɇɟɯɚɧɢɤɚ. -2015Ɇɟɯɚɧɢɤɚ. - . -ʋ 4. -ɋ. 159-170. DOI: 10.15593/perm.mech/2015 Lobanov D.S., Wildemann V.E., Spaskova E. M., Chikhachev A.I. Experimental investigation of the defects influence on the composites sandwich panels strength with use digital image correlation and infrared thermography methods. PNRPU Mechanics Bulletin. 2015. No. 4. Pɪ. 159-170. DOI: 10.15593/perm.mech/2015 ɋɬɚɬɶɹ ɩɨɫɜɹɳɟɧɚ ɷɤɫɩɟɪɢɦɟɧɬɚɥɶɧɨɦɭ ɢɫɫɥɟɞɨɜɚɧɢɸ ɜɥɢɹɧɢɹ ɞɟɮɟɤɬɨɜ ɧɚ ɨɫɬɚɬɨɱɧɭɸ ɩɪɨɱɧɨɫɬɶ ɤɨɧɫɬɪɭɤɰɢɣ ɢɡ ɤɨɦɩɨɡɢɰɢɨɧɧɵɯ ɦɚɬɟɪɢɚɥɨɜ, ɚ ɬɚɤɠɟ ɜɨɡ-ɦɨɠɧɨɫɬɢ ɩɪɢɦɟɧɟɧɢɹ ɥɨɤɚɥɶɧɵɯ ɪɟɦɨɧɬɧɨ-ɜɨɫɫɬɚɧɨɜɢɬɟɥɶɧɵɯ ɨɩɟɪɚɰɢɣ.Ɉɛɴɟɤɬɚɦɢ ɢɫɫɥɟɞɨɜɚɧɢɹ ɹɜɥɹɸɬɫɹ ɤɨɧɫɬɪɭɤɬɢɜɧɨ-ɩɨɞɨɛɧɵɟ ɷɥɟɦɟɧɬɵ, ɨɛɪɚɡɰɵ ɡɜɭɤɨɩɨɝɥɨɳɚɸɳɢɯ ɩɚɧɟɥɟɣ (ɩɚɧɟɥɢ ɁɉɄ) ɫ ɢɫɤɭɫɫɬɜɟɧɧɨ ɧɚɧɟɫɟɧɧɵɦ ɞɟɮɟɤɬɨɦ ɬɢɩɚ ɫɤɜɨɡɧɨɝɨ ɩɪɨɛɨɹ, ɩɨɫɥɟ ɥɨɤɚɥɶɧɨɝɨ ɪɟɦɨɧɬɚ. Ɉɛɪɚɡɰɵ-ɩɚɧɟɥɢ ɢɡɝɨɬɨɜɥɟɧɵ ɢɡ ɫɟɪɢɣɧɵɯ ɦɚɬɟɪɢɚɥɨɜ ɩɨ ɫɟɪɢɣɧɨɣ ɬɟɯɧɨɥɨɝɢɢ ɢɡ ɩɪɟɩɪɟɝɚ ɫɬɟɤɥɨɬɟɤɫɬɨɥɢɬɚ.ɂɫɫɥɟɞɨɜɚɧɢɹ ɩɪɨɜɨɞɢɥɢɫɶ ɧɚ ɭɧɢɜɟɪɫɚɥɶɧɨɣ ɷɥɟɤɬɪɨɦɟɯɚɧɢɱɟɫɤɨɣ ɫɢɫɬɟɦɟ Instron 5982 ɢ ɫɟɪɜɨɝɢɞɪɚɜɥɢɱɟɫɤɨɣ Instron 8801. Ⱦɥɹ ɚɧɚɥɢɡɚ ɧɚɩɪɹɠɟɧɧɨ-ɞɟɮɨɪɦɢ-ɪɨɜɚɧɧɨɝɨ ɫɨɫɬɨɹɧɢɹ ɞɟɮɨɪɦɢɪɭɟɦɵɯ ɷɥɟɦɟɧɬɨɜ ɜ ɪɚɛɨɬɟ ɢɫɩɨɥɶɡɭɟɬɫɹ ɛɟɫɤɨɧɬɚɤɬ-ɧɚɹ ɬɪɟɯɦɟɪɧɚɹ ɰɢɮɪɨɜɚɹ ɨɩɬɢɱɟɫɤɚɹ ɫɢɫɬɟɦɚ Vic-3D, ɦɚɬɟɦɚɬɢɱɟɫɤɢɣ ɚɩɩɚɪɚɬ ɤɨ-ɬɨɪɨɣ ɨɫɧɨɜɚɧ ɧɚ ɦɟɬɨɞɟ ɤɨɪɪɟɥɹɰɢɢ ɰɢɮɪɨɜɵɯ ɢɡɨɛɪɚɠɟɧɢɣ (DIC). Ⱦɥɹ ɤɨɧɬɪɨɥɹ ɜɧɭɬɪɟɧɧɟɣ ɝɟɨɦɟɬɪɢɢ ɨɛɪɚɡɰɚ ɢ ɨɰɟɧɤɢ ɜɨɡɦɨɠɧɵɯ ɞɟɮɟɤɬɨɜ ɨɫɭɳɟɫɬɜɥɹɥɚɫɶ ɬɟɩ-ɥɨɜɚɹ ɞɟɮɟɤɬɨɫɤɨɩɢɹ ɫ ɩɨɦɨɳɶɸ ɢɧɮɪɚɤɪɚɫɧɨɣ ɬɟɩɥɨɜɢɡɢɨɧɧɨɣ ɫɢɫɬɟɦɵ FLIR SC7000. ɉɪɟɞɥɨɠɟɧɵ ɦɟɬɨɞɢɤɢ ɫɨɜɦɟɫɬɧɨɝɨ ɢɫɩɨɥɶɡɨɜɚɧɢɹ ɢɫɩɵɬɚɬɟɥɶɧɵɯ ɢ ɢɡɦɟ-ɪɢɬɟɥɶɧɵɯ ɫɢɫɬɟɦ ɩɪɢ ɩɪɨɜɟɞɟɧɢɢ ɫɬɚɬɢɱɟɫɤɢɯ ɢ ɰɢɤɥɢɱɟɫɤɢɯ ɢɫɩɵɬɚɧɢɣ.Ɇɟɯɚɧɢɱɟɫɤɢɟ ɢɫɩɵɬɚɧɢɹ ɞɥɹ ɫɪɚɜɧɟɧɢɹ ɩɪɨɜɟɞɟɧɵ ɧɚ ɨɛɪɚɡɰɚɯ ɩɚɧɟɥɟɣ ɁɉɄ ɩɪɢ ɫɬɚɬɢɱɟɫɤɨɦ ɪɚɫɬɹɠɟɧɢɢ ɢ ɩɪɢ ɫɬɚɬɢɱɟɫɤɨɦ ɪɚɫɬɹɠɟɧɢɢ ɫ ɩɪɟɞɜɚɪɢɬɟɥɶɧɵɦ ɰɢɤɥɢɱɟɫɤɢɦ ɧɚɝɪɭɠɟɧɢɟɦ ɫ ɪɟɝɢɫɬɪɚɰɢɟɣ ɩɨɥɟɣ ɞɟɮɨɪɦɚɰɢɣ ɢ ɬɟɪɦɨɝɪɚɦɦ. ɋ ɰɟɥɶɸ ɚɧɚɥɢɡɚ ɦɟɯɚɧɢɡɦɨɜ ɪɚɡɪɭɲɟɧɢɹ ɨɛɪɚɡɰɚ-ɩɚɧɟɥɢ ɜ ɪɚɛɨɬɟ ɩɪɟɞɫɬɚɜɥɟɧɵ ɞɢɚɝɪɚɦɦɵ, ɩɨɫɬɪɨɟɧɧɵɟ ɜ ɩɪɨɰɟɫɫɟ ɢɫɩɵɬɚɧɢɣ ɧɚ ɫɬɚɬɢɱɟɫɤɨɟ ɪɚɫɬɹɠɟɧɢɟ. ɉɨ ɩɨɥɭɱɟɧɧɵɦ ɷɤɫɩɟɪɢɦɟɧɬɚɥɶɧɵɦ ɞɚɧɧɵɦ ɫ ɜɢɞɟɨɫɢɫɬɟɦɵ ɢɫɫɥɟɞɨɜɚɧɚ ɷɜɨɥɸɰɢɹ ɧɟɨɞɧɨɪɨɞɧɵɯ ɩɨɥɟɣ ɩɪɨɞɨɥɶɧɵɯ ɢ ɩɨɩɟɪɟɱɧɵɯ ɞɟɮɨɪɦɚɰɢɣ ɧɚ ɩɨɜɟɪɯɧɨɫɬɢ ɨɛ-ɪɚɡɰɨɜ-ɩɚɧɟɥɟɣ ɫ ɡɚɥɟɱɟɧɧɵɦ ɞɟɮɟɤɬɨɦ ɩɪɢ ɫɬɚɬɢɱɟɫɤɨɦ ɧɚɝɪɭɠɟɧɢɢ, ɚ ɬɚɤɠɟ ɩɪɢ ɰɢɤɥɢɱɟɫɤɢɯ ɢɫɩɵɬɚɧɢɹɯ. ɋ ɩɨɦɨɳɶɸ ɢɧɮɪɚɤɪɚɫɧɨɣ ɬɟɩɥɨɜɢɡɢɨɧɧɨɣ ɫɢɫɬɟɦɵ ɪɟ-ɝɢɫɬɪɢɪɨɜɚɥɢɫɶ ɜɧɭɬɪɟɧɧɹɹ ɫɬɪɭɤɬɭɪɚ, ɩɪɨɰɟɫɫɵ ɪɚɡɜɢɬɢɹ ɞɟɮɟɤɬɨɜ, ɚ ɬɚɤɠɟ ɪɚɫ-ɩɪɟɞɟɥɟɧɢɟ ɬɟɦɩɟɪɚɬɭɪ ɧɚ ɩɨɜɟɪɯɧɨɫɬɢ ɢɫɩɵɬɵɜɚɟɦɨɝɨ ɨɛɪɚɡɰɚ. © ɉɇɂɉɍɄɥɸɱɟɜɵɟ ɫɥɨɜɚ: ɷɤɫɩɟɪɢɦɟɧɬɚɥɶɧɚɹ ɦɟɯɚɧɢɤɚ, ɤɨɦɩɨɡɢɰɢɨɧɧɵɟ ɦɚɬɟɪɢɚɥɵ, ɦɟɬɨɞɢɤɢ ɢɫɩɵɬɚɧɢɣ, ɦɟɬɨɞ ɤɨɪɪɟɥɹɰɢɢ ɰɢɮɪɨɜɵɯ ɢɡɨɛɪɚɠɟɧɢɣ, ɢɧɮɪɚɤɪɚɫɧɚɹ ɬɟɩɥɨɜɢɡɢɨɧɧɚɹ ɫɢɫɬɟɦɚ, ɨɰɟɧɤɚ ɪɚɛɨɬɨɫɩɨɫɨɛɧɨɫɬɢ, ɩɚɧɟɥɢ ɁɉɄ, ɥɨɤɚɥɶɧɵɣ ɪɟɦɨɧɬ ɜɨɥɨɤɧɢɫɬɵɯ ɤɨɦɩɨɡɢɬɨɜ, ɰɢɤɥɢɱɟɫɤɢɟ ɢɫɩɵɬɚɧɢɹ, ɢɫɩɵɬɚɧɢɹ ɧɚ ɪɚɫɬɹɠɟɧɢɟ © Ʌɨɛɚɧɨɜ Ⱦɦɢɬɪɢɣ ɋɟɪɝɟɟɜɢɱ -ɦɥɚɞɲɢɣ ɧɚɭɱɧɵɣ ɫɨɬɪɭɞɧɢɤ, e-mail: cem.lobanov@gmail.com ȼɢɥɶɞɟɦɚɧ ȼɚɥɟɪɢɣ ɗɪɜɢɧɨɜɢɱ -ɞɨɤ...

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Section: © ɉɇɂɉɍunclassified

Experimental Investigation of Defects Influence on Composites Sandwich Panels Strength Using Digital Image Correlation and Infrared Thermography Methods

et al. 2015

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“…Starting from the hypothesis that the failure of a specimen (or a mechanical component) for fatigue stress occurs when the dissipated energy reaches a value E l (limit energy) which is constant independently of loading conditions [7,9,21], Fargione et al [22] proposed, for the first time, a new method (Risitano method) to determinate the fatigue curve (Wohler curve) of a material. By means of experimental control data performed in identical conditions (equal value of stress ratio R and test frequency f), it was verified that the value at the fatigue fracture of the energetic parameter (ĭ l ), in the same away as E l, remains constant independent from loading conditions.…”

Section: -P2 14th International Conference On Experimental Mechmentioning

confidence: 99%

“…In 2008 F. Walter and D. Eifler [23] proposed a accelerated procedure for the determination of the Wöehler curve. They used a similar procedure as the one discussed in Ref [22] (step loads) in order to load the specimens and they measured the temperature of the specimen surface together with the electrical resistance of the specimen. By the Basquin equation which was adapted by the electrical measured parameters, they calculated the fatigue curve for a constant amplitude loading and random loading.…”

Section: -P2 14th International Conference On Experimental Mechmentioning

confidence: 99%

“…On the basis of the hypothesis of Feltner and Morrow [21], confirmed by J F Delorme [7] and used by Kaleta et al [9] and Risitano [22], Blonty and Kaleta worked both on mathematical model [24] and in experimental way [26,27] to study the energy expended in the material by determination of the heat energy released during the fatigue test. Atzori et al [28,29] studied the relation between the stress amplitude in fatigue tests, the specific heat loss and the fatigue life.…”

Section: -P2 14th International Conference On Experimental Mechmentioning

confidence: 99%

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Fatigue limit by thermal analysis of specimen surface in mono axial traction test

Risitano

Giacomo

Clienti

2010

EPJ Web of Conferences

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Abstract. In this work is indicated how it could be possible to evaluate the limit stress of the thermo-elastic phase of deformation by thermo-analysing the surface of the specimen during a static traction test. Adding the temperature curve measured on a small area of the surface (the hottest) to the classic stress-strain curve, it is possible to evaluate a limit temperature T 0 coincident with the beginning of the non linear trend of the curve. The corresponding stress value is coincident with the fatigue limit of the analyzed component. As an example, the results of traction tests performed on two notched specimens, where the change of linearity in the temperature curve during static traction test was evident, are reported. The corresponding value of stress was a good approximation of the fatigue limit for R = -1, determined by the conventional method. The aim of the reported examples in this paper must be interpreted as support to the basic principle of the method and not as the results of a complete experimental planning of which we will comment in an another occasion.1 Nomenclature E l energy required for fatigue fracture ĭ l integral of a surface point temperature, proportional to E l , at fatigue fracture ı stress ı 0 fatigue limit for R = -1 (limit stress above which some crystal is plasticized)) ı i minimum stress ı s maximum stress ı m mean stress ı p plastic stress ı 0,2 yield stress ı r fracture strength/original cross sectional area and t r is the test time with thermo plastic behaviour f loading frequency R stress ratio İ strain İ 0 strain corresponding to ı 0 a

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“…The current progress in the development of infrared detectors makes the infrared thermography a powerful, non-destructive, non-contact technique for investigation of heat dissipation during different deformation processes. For instance, the infrared thermography has been successfully used for fast determination of the fatigue limit and shape of the Wőhler curve [1,2]. In spite of these successes, the modern applications of this technique and experimental works of the authors of this paper show a lack in the adequate theoretical models.…”

Section: Introductionmentioning

confidence: 99%

Theoretical analysis, infrared and structural investigations of energy dissipation in metals under cyclic loading

Plekhov

Saintier

Palin‐Luc

et al. 2007

Materials Science and Engineering: A

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is an open access repository that collects the work of Arts et Métiers ParisTech researchers and makes it freely available over the web where possible. AbstractThe infrared and structural investigations of energy dissipation processes in metals subjected to cyclic loading have given impetus to the development of a new thermodynamic model with the capability of describing the energy balance under plastic deformation. The model is based on the statistical description of the mesodefect ensemble evolution and its influence on the dissipation ability of the material. Constitutive equations have been formulated for plastic and structural strains, which allow us to describe the stored and dissipated parts of energy under plastic flow. Numerical results indicate that theoretical predictions are in good agreement with the experimentally observed temperature data.

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Rapid determination of the fatigue curve by the thermographic method

Cited by 324 publications

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Experimental Investigation of Defects Influence on Composites Sandwich Panels Strength Using Digital Image Correlation and Infrared Thermography Methods

Experimental Investigation of Defects Influence on Composites Sandwich Panels Strength Using Digital Image Correlation and Infrared Thermography Methods

Fatigue limit by thermal analysis of specimen surface in mono axial traction test

Theoretical analysis, infrared and structural investigations of energy dissipation in metals under cyclic loading

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