Optimization of Scallop Design for Cylinder Head of a Multi-Cylinder Diesel Engine for Reduction of Combustion Deck Temperatures and Simultaneously Enhancing Combustion Deck Fatigue Margin

Mahajan, Pratik; Bodake, Rajendra; Thakur, Anil

doi:10.4271/2021-01-1233

SAE Technical Paper Series 2021

DOI: 10.4271/2021-01-1233

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Optimization of Scallop Design for Cylinder Head of a Multi-Cylinder Diesel Engine for Reduction of Combustion Deck Temperatures and Simultaneously Enhancing Combustion Deck Fatigue Margin

Pratik Mahajan¹,

Rajendra Bodake²,

Anil Thakur³

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2024

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Low cycle fatigue prediction for cylinder heads considering stress gradient and local yielding

Ashouri

2024

Proceedings of the Institution of Mechanical Engineers, Part D:

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Due to the complex geometry and thermo-mechanical loading, cylinder heads is the most challenging parts among all parts engines. It must endure cyclic thermo-mechanical stresses throughout their lifetime. In this paper, the low cycle fatigue (LCF) life analysis of the cylinder heads considering the stress gradient and local yielding, is performed using the finite element method and ANSYS software to predict the temperature and stresses, and then, LCF life using Morrow theory and nCode Design Life software. Elastic and plastic properties of cylinder heads obtained by LCF tests at different temperatures. The results of finite element analysis (FEA) showed that the maximum temperature and stress values in the cylinder heads are 220.29°C and 89.868 MPa and the position is at the valve bridge between exhaust valves. The numerical results showed that bridge between exhaust valves and valve seats are areas susceptible to fatigue cracks. The LCF life results showed that 1073 cycles is the minimum fatigue life and occurs between exhaust valves. 400-h durability test showed no rupture in different parts of the cylinder heads.

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Low cycle fatigue prediction for cylinder heads considering stress gradient and local yielding

Ashouri

2024

Proceedings of the Institution of Mechanical Engineers, Part D:

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show abstract

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Optimization of Scallop Design for Cylinder Head of a Multi-Cylinder Diesel Engine for Reduction of Combustion Deck Temperatures and Simultaneously Enhancing Combustion Deck Fatigue Margin

Cited by 1 publication

References 6 publications

Low cycle fatigue prediction for cylinder heads considering stress gradient and local yielding

Low cycle fatigue prediction for cylinder heads considering stress gradient and local yielding

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