Fast Fatigue Properties Identification by “Self-heating” Method: Application to Automotive Welded Joints

Florin, Pierrick; Facchinetti, Matteo Luca; Doudard, Cédric; Calloch, Sylvain

doi:10.1016/j.proeng.2013.12.120

Cited by 8 publications

(3 citation statements)

References 10 publications

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“…Very few works have tried to use accelerated thermographic methods by monitoring surface temperature to study the fatigue behaviour of complex components or welded joints . In particular, a fatigue analysis has been carried out on butt welded AH36 steel joints using the rapid thermographic method resulting in good agreement with the S‐N curve obtained as reported in codes and standards …”

Section: Introductionmentioning

confidence: 87%

Thermoelastic Phase Analysis (TPA): a new method for fatigue behaviour analysis of steels

Palumbo

Galietti

2016

Fatigue Fract Eng Mat Struct

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In literature, there are already well‐established thermal methods which allow for the estimation of fatigue limit, in particular for metallic materials such as austenitic steels. These methods are based on heat source generation analysis or on surface temperature evaluation of material subjected to different types of cyclic loading. General application of methodology found limitation in those cases in which temperature changes on material related to fatigue damage were very low and, furthermore, thermal methods require high‐performance equipment and a difficult setup. This is the case, for instance, with brittle materials (such as martensitic steels), welded joints and aluminium alloys. In this work, a new thermal method named Thermoelastic Phase Analysis is used to evaluate the fatigue limit of martensitic steels. This thermal method is based on an empirical approach. The main idea is that phase of thermoelastic response of the material subjected to fatigue loading is influenced by the presence of a heat source due to dissipative phenomena related to damage. Monitoring of the phase parameter provides a more stable setup and an independent means of identifying the fatigue limit of material. The method has also proven to be potentially one order of magnitude faster than traditional thermal methods.

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Section: Introductionmentioning

confidence: 87%

Thermoelastic Phase Analysis (TPA): a new method for fatigue behaviour analysis of steels

Palumbo

Galietti

2016

Fatigue Fract Eng Mat Struct

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“…Thermography has proven to be an effective and versatile experimental method for the characterization of the fatigue behaviour of welded joints. For instance it allows for the characterization of a local heat dissipation behaviour useful to the assessment of a predictive fatigue model 8,22,23 . It can also be used for a rapid assessment of the fatigue strength [24][25][26] , based on an empiric self-heating approach 27 .…”

Section: Infrared Thermography For the Detection Of Cracksmentioning

confidence: 99%

Use of infrared thermography to model the effective stress ratio effect on fatigue crack growth in welded T-joints

Bercelli

Levieil

Doudard

et al. 2023

Engineering Fracture Mechanics

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“…More recently, other authors have showed similar correlation for simple specimens made of steel, 17,18 copper, 19 polymer 20 and for more complex structures such as a ship propeller 21 and welded joints. 22 However, especially for structures, the temperature variations are not directly related to heat sources but are influenced by heat transfer (conduction and convection). Thus, heat sources are more relevant than temperature variations to be correlated with fatigue limit.…”

Section: Introductionmentioning

confidence: 99%

Thermographic approach for high cycle fatigue of seam welded steel joints under variable amplitude loadings

Pierron

Maïtournam

Raoult

2020

Fatigue Fract Eng Mat Struct

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In the automotive field, welded joints are the weak points of the steel parts of the chassis in terms of fatigue. The fatigue strength of arc-welded parts is generally evaluated using fatigue tests under constant amplitude loadings designed according the Palmgren-Miner rule. In this paper, the relevance of this process is tested with an experimental campaign on welded specimens subjected to various variable amplitude loads. In addition, to solve the recurrent issue of lack of fatigue data, a thermographic method is investigated as an alternative for monitoring the damage rate evolution. A theoretical thermal model is proposed to estimate a local heat source from the infrared thermal measurements during constant and variable amplitude loading tests. This heat source is shown to be correlated with fatigue damage, which provides a further insight on the evolution of damage during nonconstant amplitude fatigue tests.

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Fast Fatigue Properties Identification by “Self-heating” Method: Application to Automotive Welded Joints

Cited by 8 publications

References 10 publications

Thermoelastic Phase Analysis (TPA): a new method for fatigue behaviour analysis of steels

Thermoelastic Phase Analysis (TPA): a new method for fatigue behaviour analysis of steels

Use of infrared thermography to model the effective stress ratio effect on fatigue crack growth in welded T-joints

Thermographic approach for high cycle fatigue of seam welded steel joints under variable amplitude loadings

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