Cracking Failure Analysis and Optimization on Exhaust Manifold of Engine with CFD-FEA Coupling

Zhang, Yan; Liu, Zhien; Wang, Xiaomin; Zheng, Hao; Xu, Ying-Ying

doi:10.4271/2014-01-1710

Cited by 8 publications

(3 citation statements)

References 9 publications

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“…The effect of varying cyclic temperatures would result in changes in the strain of the body's elasticity. There are two strain types of an elastic body, primarily when the component is generated by free expansion; otherwise, the component is generated by internal constraints of various fractions during the thermal analysis [11]. When varying the temperature from cold to hot, the bolt forces also vary [5].…”

Section: Thermal Stress Analysis Resultsmentioning

confidence: 99%

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2023

IJSTT

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The commonly used form of transportation mostly relies on-road vehicles nowadays. A vehicle is a mechanism to commute between places with higher efficiency and less time consumption. A vehicle usually consists of multiple working components, in which the engine is well-known to be one of its most crucial components. Although it can be considered the most vital component in a vehicle, the knowledge gaps for an engine are still unlimited. So much more potential can be explored for an engine to reach its maximum capabilities. Part of the perspective that should be explored is to study the engine's thermal properties. This paper aims to investigate the effect of varying temperatures at the exhaust manifold under a certain amount of time spans. The temperature varied from low to high and vice versa for 6 cycles. The results revealed that the exhaust manifold had undergone an alteration in the strain of the body's elasticity. Because of that, the displacement of the exhaust manifold, load distribution, and direction have also been affected.

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Section: Thermal Stress Analysis Resultsmentioning

confidence: 99%

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2023

IJSTT

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“…All exhaust system constraint modal frequencies within 200Hz are as shown in TABLE I. According to the cold and warm-up engine idle speed, calculate excitation frequency range 22Hz to 28Hz [9], and TABLE I shows that the natural frequency of the exhaust system avoids the engine idle excitation frequency. It is conclusion that hanger location is suitable.…”

Section: Constrained Modal Analysis Of the Exhaust System With Powert...mentioning

confidence: 99%

Analysis on Hanger Location and Hanger Isolator of an Exhaust System with Powertrain

Liu¹,

Zhang²,

Du³

et al. 2014

Proceedings of the 2014 International Conference on Mechatronics, Electronic, Industrial and Control Engineering

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To improving the NVH (Noise, Vibration and Harshness) performance of vehicles, the NVH performance of exhaust system must be considered. As hanger is the main vibration transfer path and hanger isolator is the crucial vibration isolation components, it is necessary to study hanger location and stiffness of vibration isolation. About the study of exhaust system is executed in four steps. Firstly, according the free modal analysis of the exhaust system, the ADDOFD (Average Driving Degree of Freedom Displacement) is acquired, and the suitable location of hanger is confirmed soon. Secondly, studied the powertrain influences to the vibration performance of exhaust system, the constrained modal frequencies must avoid the engine idle resonant frequency. Thirdly, the dynamic analysis of the exhaust system is researched based on the second step, in which way 100000N•mm sinusoidal excitation is applied at the powertrain's barycenter in the crankshaft rotation direction, and then the response reaction force (less than 5N) of the hanger are gained. Finally, the relationship between the bending and torsional modes of exhaust system and the stiffness of the hanger isolator are inquired. It is of great engineering significance.

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“…Consequently, the heat resistance and high-temperature performance of piston may be controlled by appropriately adjusting the concentration of alloying elements. In order to anticipate the structural failure of exhaust manifolds, Yan et al [ 19 ] used a coupled CFD-FEM technique. They discovered that high cycle fatigue collapse was caused by the first natural frequency.…”

Section: Introductionmentioning

confidence: 99%

Optimization of two-wheeler Bike engine among three different designs using design of experiments

Dadhich,

Sharma,

Jain

et al. 2024

Heliyon

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Cracking Failure Analysis and Optimization on Exhaust Manifold of Engine with CFD-FEA Coupling

Cited by 8 publications

References 9 publications

Untitled

Untitled

Analysis on Hanger Location and Hanger Isolator of an Exhaust System with Powertrain

Optimization of two-wheeler Bike engine among three different designs using design of experiments

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