Investigation of application-specific phenomena to improve the lifetime assessment for turbine housings of turbochargers
✍ Scribed by Frank Laengler; Tongsheng Mao; Alfred Scholz
- Publisher
- Elsevier
- Year
- 2011
- Tongue
- English
- Weight
- 805 KB
- Volume
- 10
- Category
- Article
- ISSN
- 1877-7058
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✦ Synopsis
The turbine housing of a turbocharger is exposed to extensive cyclic thermo-mechanical loading. This leads to multiaxial stress states with local plastifications, so that the design of the turbine housing becomes a major challenge in ensuring the guaranteed lifetime in relation to the high-temperature behavior of the materials. To improve the component structural analysis, a phenomenological lifetime estimation approach, in conjunction with a constitutive material model applied in a preceding Finite-Element analysis, for application on the casting materials Ni-resist D5S and GJV was developed and validated. The focus of the following step discussed in this paper was the adaption for turbine housing design by considering the investigation of application-specific phenomena such as strain rate, mean strain or aging.