Lifetime simulation of thermo-mechanically loaded components

Riedler, Martin; Leitner, Harald; Prillhofer, Bernd; Winter, George; Eichlseder, Wilfried

doi:10.1007/s11012-006-9020-z

Cited by 50 publications

(40 citation statements)

References 14 publications

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“…If an energy-based criteria used for the fatigue lifetime prediction, the plastic strain energy of both OP-TMF/HT-LCF tests is become almost equal and therefore, the fatigue lifetime of them is become the same, approximately. For this objective, the following formula [18] is used based on energy-based methods, in the following equation:…”

Section: Resultsmentioning

confidence: 99%

Effects of strain rate and mean strain on cyclic behavior of aluminum alloys under isothermal and thermo-mechanical fatigue loadings

Azadi¹

2013

International Journal of Fatigue

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Section: Resultsmentioning

confidence: 99%

Effects of strain rate and mean strain on cyclic behavior of aluminum alloys under isothermal and thermo-mechanical fatigue loadings

Azadi¹

2013

International Journal of Fatigue

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“…This type of loadings can be created by bolt forces and the insert of valve seats. These OP-TMF loading configurations are set due to real operation conditions of cylinder heads [16,22,23]. It should be noted that all tests are performed under tensioncompression loadings and the fatigue failure (the end of the lifetime) is defined as a first drop in maximum stress during the lifetime.…”

Section: Test Conditionsmentioning

confidence: 99%

Heat treatment effect on thermo-mechanical fatigue and low cycle fatigue behaviors of A356.0 aluminum alloy

Azadi

Shirazabad

2013

Materials & Design

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a b s t r a c tIn the present paper, the heat treatment effect on A356.0, a cast aluminum alloy which has been widely used in diesel engine cylinder heads, is investigated under out-of-phase thermo-mechanical fatigue and low cycle fatigue (at different temperatures) loadings. A typical heat treatment is applied to the material including 8 h solution at 535°C, water quench and 3 h ageing at 180°C. The experimental fatigue results show that the heat treatment process has considerable influence on mechanical and low cycle fatigue behaviors, especially at room temperature, but its effect on thermo-mechanical fatigue lifetime is not significant. The improvement in the strength can be explained by the dislocation theory. Under thermomechanical fatigue loadings, the difference between the fatigue lifetime of A356.0 alloy and A356.0-T6 alloy decreases when the temperature range increases. In this condition, plastic strain increases severely during the fatigue cycles in A356.0-T6 alloy due to over-ageing phenomenon and therefore, the amount of cyclic softening in heat treated alloy is more.

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“…After being manufactured and put into operation, the cast iron engine component is exposed to an aggressive environment involving time-varying mechanical loads and high temperatures due to the cyclic nature of the engine operation, commonly referred to as the start-operate-stop cycle [1]. During one such period of the time-dependent operation, the material is heated and cooled as the engine starts up and shuts down implying a thermal expansion and contraction.…”

Section: Introductionmentioning

confidence: 99%

“…These life-limiting aspects can be alleviated by a sophisticated engine design which to a wider extent is based on computer simulations using commercial nite element (FE) software rather than on component prototype testing [1,2,3,4]. Such simulations are often divided into three uncoupled analyses, the thermal, mechanical and fatigue analysis [2], where the development of the latter is the subject of this paper.…”

Section: Introductionmentioning

confidence: 99%

Thermo-mechanical and superimposed high-cycle fatigue interactions in compacted graphite iron

Norman

Skoglund

Leidermark

et al. 2015

International Journal of Fatigue

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The eect of adding a superimposed high-frequent strain load, denoted as a high-cycle fatigue strain component, upon a strain-controlled thermomechanical fatigue test has been studied on a compacted graphite iron EN-GJV-400 for dierent thermo-mechanical fatigue cycles and high-cycle fatigue strain ranges. It is demonstrated that the successive application of an high-cycle fatigue load has a consistent eect on the fatigue life, namely the existence of a constant high-cycle fatigue strain range threshold below which the fatigue life is unaected but severely reduced when above. This eect on the fatigue life is predicted assuming that microstructurally small cracks are propagated and accelerated according to a Paris law incorporating an experimentally estimated crack opening level.

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Lifetime simulation of thermo-mechanically loaded components

Cited by 50 publications

References 14 publications

Effects of strain rate and mean strain on cyclic behavior of aluminum alloys under isothermal and thermo-mechanical fatigue loadings

Effects of strain rate and mean strain on cyclic behavior of aluminum alloys under isothermal and thermo-mechanical fatigue loadings

Heat treatment effect on thermo-mechanical fatigue and low cycle fatigue behaviors of A356.0 aluminum alloy

Thermo-mechanical and superimposed high-cycle fatigue interactions in compacted graphite iron

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