Aluminum Cylinder Head High Cycle Fatigue Durability Including the Effects of Manufacturing Processes

2012 ◽  
Author(s):  
Xingfu Chen ◽  
Carlos Engler-Pinto ◽  
Michael King ◽  
Mei Li ◽  
Eben Prabhu ◽  
...  
Keyword(s):  
Cylinder Head ◽  
High Cycle Fatigue ◽  
Manufacturing Processes ◽  
Cycle Fatigue ◽  
Fatigue Durability ◽  
Aluminum Cylinder

Influence of Microstructure and Defect Population on the Fatigue Performance of Cast A356-T6 Automotive Components

2014 ◽  
Vol 782 ◽  
pp. 301-305
Author(s):  
Radomila Konečná ◽  
Gianni Nicoletto ◽  
Enrica Riva
Keyword(s):  
Fatigue Strength ◽  
Cylinder Head ◽  
High Cycle Fatigue ◽  
Fatigue Testing ◽  
High Strength ◽  
Cycle Fatigue ◽  
Cast Aluminum ◽  
Staircase Method ◽  
Automotive Components ◽  
Aluminum Cylinder

In the paper fatigue specimens are extracted from different regions of cast aluminum cylinder heads produced by two foundries. A high strength region and a low strength region were identified within the cylinder head and the A356-T6 material locally characterized in terms of microstructure and defect population. High cycle fatigue testing according to a reduced staircase method was performed to determine the local fatigue strength at 107 cycles in the cylinder heads of the two foundries. The implications of the experimental observations are discussed.

Prediction of Exhaust System Vibration Through Harmonic Analysis & High Cycle Fatigue Life Evaluation

2021 ◽  
Author(s):  
Bhaskarjyoti Saikia ◽  
Girish Kulkarni ◽  
Hrushikesh Sathe ◽  
Pravin Kakde ◽  
Tanmay Vyas ◽  
...  
Keyword(s):  
Fatigue Life ◽  
Harmonic Analysis ◽  
Modal Analysis ◽  
Natural Frequency ◽  
Cylinder Head ◽  
High Cycle Fatigue ◽  
Exhaust System ◽  
Exhaust Manifold ◽  
Cycle Fatigue ◽  
System Vibration

Abstract Exhaust system typically experiences vibration during engine operating conditions due to periodic disturbing forces (firing force and inertia force) which are generated from the engine. Natural frequency of the exhaust system gets excited due to the periodic forces causing resonance which often leads to high cycle fatigue (HCF) failure. Turbocharger is a part of exhaust system and it is mounted on the exhaust manifold. The periodic forces are transferred from engine base (Cylinder head and Block) and these forces gets amplified to overhanging components like exhaust system turbocharger. It is an industrywide practice to perform modal analysis to determine the natural frequencies of the system. However, modal analysis cannot predict the intensity with which the system would vibrate. Thus, we need to make some assumptions about the system vibration ‘g’ levels. Based on accuracy of this assumption, we may end up under-designing or over-designing the system. Harmonic analysis enables us to accurately predict the ‘g’ level at turbocharger using experimental cylinder head base excitations. After recording the correlation with experimental data in many cases it was found that this approach further aided in establishing damping constant factor of the exhaust manifold at elevated temperature. This analysis process has been validated with multiple cases as it has turned out to be a potential approach while doing design risk assessments and optimizing the engine vibration validation efforts. The benefit of prediction of exhaust system vibration level allows us to avoid iterative design process in the early stage of product development thus optimizing the design by taking advantage of shifting the natural frequency of exhaust system to lower source excitation (cylinder head). This saves vast amount of simulation lead time. Another benefit of this process is that the prediction of resonance condition of exhaust system through simulation helps us to estimate the fatigue life against the predicted ‘g’ level.

Study on Temperature and High Cycle Fatigue Evaluation of Heavy Duty Diesel Engine Cylinder Head and Improved Design

2013 ◽  
Vol 753-755 ◽  
pp. 1044-1049
Author(s):  
Guo Xi Jing ◽  
Ru Hua Zhang ◽  
Chang Min Guo ◽  
Peng Li ◽  
Xiu Qiao Wang
Keyword(s):  
Cylinder Head ◽  
High Cycle Fatigue ◽  
Structure Design ◽  
Cycle Fatigue ◽  
Original Design ◽  
Engine Cylinder ◽  
Heavy Duty Diesel Engine ◽  
Heavy Duty Diesel ◽  
Improved Design ◽  
Fatigue Evaluation

A synthesized simulation process was used to predicting temperature and high cycle fatigue (HCF) of cylinder head in this paper. Firstly, the temperature prediction model was built and calibrated by the test data, which ensured the rationality. The simulation result shows that the material thermal conductivity is very low and the position of the drilling holes near the deck is very high, and the thermal load was reduced effectively through improving the material conductivity and optimizing the structure design. Finally a fatigue life evaluation has been performed which shows the HCF safety factor is higher than the original design due to the temperature reduction.

Field Risk Assessment Based on Cylinder Head Design Process to Improve High Cycle Fatigue Performance

2017 ◽  
Author(s):  
Todd Brewer ◽  
Cagri Sever ◽  
Ruichen Jin ◽  
Michael Herr ◽  
Xingfu Chen ◽  
...  
Keyword(s):  
Risk Assessment ◽  
Design Process ◽  
Cylinder Head ◽  
High Cycle Fatigue ◽  
Fatigue Performance ◽  
Cycle Fatigue

High-cycle fatigue failure analysis of cast Al-Si alloy engine cylinder head

2021 ◽  
pp. 105546
Author(s):  
Pei-rong Ren ◽  
Wei Song ◽  
Gu Zhong ◽  
Wei-qing Huang ◽  
Zheng-xing Zuo ◽  
...  
Keyword(s):  
Failure Analysis ◽  
Fatigue Failure ◽  
Cylinder Head ◽  
High Cycle Fatigue ◽  
Cycle Fatigue ◽  
Engine Cylinder

Cylinder Head Design Process to Improve High Cycle Fatigue Performance

2017 ◽  
Author(s):  
Xingfu Chen ◽  
Todd Brewer ◽  
Cagri Sever ◽  
Eben Prabhu ◽  
Reda Adimi ◽  
...  
Keyword(s):  
Design Process ◽  
Cylinder Head ◽  
High Cycle Fatigue ◽  
Fatigue Performance ◽  
Cycle Fatigue

High Cycle Fatigue and Fatigue Crack Propagation Behaviors of Modified A7075-T73 Alloy

2014 ◽  
Vol 52 (4) ◽  
pp. 283-291 ◽  
Author(s):  
Gwan Yeong Kim ◽  
Kyu Sik Kim ◽  
Joong Cheol Park ◽  
Shae Kwang Kim ◽  
Young Ok Yoon ◽  
...  
Keyword(s):  
Fatigue Crack ◽  
Crack Propagation ◽  
Fatigue Crack Propagation ◽  
High Cycle Fatigue ◽  
Cycle Fatigue

CARPENTER TOURALLOY 230 PLUS

Alloy Digest ◽  
2011 ◽  
Vol 60 (2) ◽  
Keyword(s):  
Fracture Toughness ◽  
Corrosion Resistance ◽  
Physical Properties ◽  
Tensile Properties ◽  
High Strength ◽  
Heat Treating ◽  
Cycle Fatigue ◽  
Fatigue Durability ◽  
Face Plate

Abstract Carpenter Touralloy 230 Plus stainless was originally developed for high-strength aerospace components, however, it may provide improved bar cycle fatigue durability, compared to other traditional golf face plate alloys. This datasheet provides information on composition, physical properties, hardness, elasticity, and tensile properties as well as fracture toughness. It also includes information on corrosion resistance as well as forming, heat treating, and joining. Filing Code: SS-1084. Producer or source: Carpenter Specialty Alloys.

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