A Thermoviscoplastic FE Model for the Strain Prediction in High Temperature, Thermal Cycling Applications for Silicon Molybdenum Nodular Cast Iron

Anderson, Donald H.; Haan, D.M.; Olree, Michael

doi:10.4271/980697

Cited by 6 publications

(2 citation statements)

References 11 publications

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“…The thermomechanical loading cycles considered for an exhaust manifold correspond to an idle-full load cycle of the engine. More precisely, this implies an inflow of hot gases through the manifold heating it up, a dwell time at maximum temperature and a cooling period [1,14]. Therefore, three computations will determine the global behavior of the structure:…”

Section: The Thermal and The Mechanical Analysismentioning

confidence: 99%

A computational approach to thermomechanical fatigue

Constantinescu

2004

International Journal of Fatigue

108

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This paper presents a computational approach for the lifetime assessment of structures under thermomechanical loading. One of the main features of the work is the search for simplicity and robustness in all steps of the modeling, in order to match the proposed method with industrial constraints. Among the peculiarities of the engineering environment are the imposed commercial computer programs and the short time delays for manufacturing. The proposed method is composed of a fluid flow, a thermal and a mechanical finite element computation, as well as a final fatigue analysis. The efficiency of the approach is proved by comparison with experimental results on prototype manifolds. The numerical results match both the localization of the damage zone and the lifetime

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Section: The Thermal and The Mechanical Analysismentioning

confidence: 99%

A computational approach to thermomechanical fatigue

Constantinescu

2004

International Journal of Fatigue

108

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“…Figure 10 shows the distributions of the plastic strain calculated on the basis of the temperature histories during heating and cooling. The plastic strain amplitudes are closely related to mechanical failures 17–19 and are deterministic of the fatigue life of the turbine housing. Usually, this means that fatigue failures can occur when the plastic strain values are greater than the resistant capacities of the material.…”

Section: Resultsmentioning

confidence: 99%

Inelastic stress analysis and failure prediction of the turbine housing in engine motoring tests

Choi

2015

Proceedings of the Institution of Mechanical Engineers, Part D:

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In order to predict the thermomechanical failure of the turbine housing, it is essential to consider temperature-dependent inelastic materials undergoing thermal cyclic loads and to obtain the transient temperature distributions. This paper presents the analysis methods to calculate the thermal stresses and the plastic strain ranges for prediction of the fatigue life. The presented work is based on the engine motoring mode test that is commonly used for accelerated engine endurance tests. The results showed that the localized critical regions coincided well with the crack locations identified on the basis of a thermal shock test. The plastic strain values were predicted to lie within the range 0.216–0.396% corresponding to a range of 628–1450 cycles for 1600 target cycles.

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