Fatigue design and reliability in the automotive industry

Thomas, Jean-Jacques; Perroud, G.; Bignonnet, A.; Monnet, D.

doi:10.1016/s1566-1369(99)80025-9

Cited by 32 publications

(25 citation statements)

References 1 publication

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“…After N 1 cycles, it leads, in all cases, to the failure of the components. 12 These results demonstrate that the different hypothesis and simplifications about uncoupling mechanical behavior and damage seem to be sufficient for this type of TMF design. The fatigue results are presented on the Fig.…”

Section: Experimental and Computed Resultsmentioning

confidence: 81%

Fatigue design of structures under thermomechanical loadings

Charkaluk¹,

Bignonnet

Constantinescu

et al. 2002

Fatigue Fract Eng Mat Struct

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108

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This paper presents a global approach to the design of structures that experience thermomechanical fatigue loading, which has been applied successfully in the case of cast-iron exhaust manifolds. After a presentation of the design context in the automotive industry, the important hypotheses and choices of this approach, based on a thermal 3D computation, an elastoviscoplastic constitutive law and the dissipated energy per cycle as a damage indicator associated with a failure criterion, are first pointed out. Two particular aspects are described in more detail: the viscoplastic constitutive models, which permit a finite element analysis of complex structures and the fatigue criterion based on the dissipated energy per cycle. The FEM results associated with this damage indicator permit the construction of a design curve independent of temperature; an agreement is observed between the predicted durability and the results of isothermal as well as non isothermal tests on specimens and thermomechanical fatigue tests on real components on an engine bench. These results show that thermomechanical fatigue design of complex structures can be performed in an industrial context

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Section: Experimental and Computed Resultsmentioning

confidence: 81%

Fatigue design of structures under thermomechanical loadings

Charkaluk¹,

Bignonnet

Constantinescu

et al. 2002

Fatigue Fract Eng Mat Struct

Self Cite

108

View full text Add to dashboard Cite

show abstract

“…If we refer to the design of a component detail subjected to a strain amplitude for a design life b N, adopting the format developed by Bignonnet for HCF [24,25], the fatigue failure probability could be also calculated as (see Fig. 2):…”

Section: Calculation Of P F Through a Log-normal Formatmentioning

confidence: 99%

A log-normal format for failure probability under LCF: Concept, validation and definition of design curve

Beretta

Foletti

Rusconi

et al. 2016

International Journal of Fatigue

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“…An alternative to the lognormal format is the approach firstly proposed by Bignonnet [21,22] and adopted by SNCF for deliverable D2.2 [13]. The first step of the method by SNCF consists in calculating an equivalent constant amplitude stress ðN eq ; S eq Þ which has the same damage as the analysed spectrum.…”

Section: Bignonnet Methodsmentioning

confidence: 99%

Probabilistic fatigue assessment for railway axles and derivation of a simple format for damage calculations

Beretta

Regazzi

2016

International Journal of Fatigue

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This paper describes a procedure for the determination of railway axle risk of fatigue failure under service loading for a simple fatigue assessment compliant to modern structural recommendations.\ud After an initial review of reliability assessment under fatigue, a fully probabilistic approach is outlined, whose input data for the fatigue damage obtained with the EURAXLES project are briefly summarised. Then, a series of Montecarlo simulations was carried out in order to determine the maximum allowable stress for a given axle made of EA4T and EA1N under service conditions identified by di↵erent load spectra from the literature.\ud Results have been obtained in terms of a safety factor for damage calculations that allows designers to adopt a simple semi-probabilistic approach for designing axles for a target reliability against fatigue. The application of this procedure to a railway axle then shows how safety factors should be have to be further increased for taking into the prospective presence of impact damages

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Fatigue design and reliability in the automotive industry

Cited by 32 publications

References 1 publication

Fatigue design of structures under thermomechanical loadings

Fatigue design of structures under thermomechanical loadings

A log-normal format for failure probability under LCF: Concept, validation and definition of design curve

Probabilistic fatigue assessment for railway axles and derivation of a simple format for damage calculations

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