Simulation of Thermal Stress and Hot Tearing in Engine Block Casting

2010 ◽  
Vol 154-155 ◽  
pp. 1571-1574 ◽  
Author(s):  
Jin Xiang Liu ◽  
Ri Dong Liao
Keyword(s):  
Thermal Stress ◽  
Initial Temperature ◽  
Process Analysis ◽  
Hot Tearing ◽  
Engine Block ◽  
Parameter Design ◽  
Filling Process ◽  
Casting Parameter ◽  
Thermal Stress Distribution ◽  
Hot Tearing Indicator

Using finite element method, a numerical simulation is presented for engine block casting. The filling process analysis provides an accurate initial temperature field to the thermal stress and hot tearing investigations; meanwhile, it is useful in prediction of cooling shut. The thermal stress distribution after solidification of the casting is solved. To assess the hot tearing, the RGD criterion is adopted. Both hot tearing indicator and thermal stress can be used to estimate the susceptibility of hot tearing. The results can offer a reference to casting parameter design for engine block.

Finite Element Analysis of Thermal Stress Distribution in Planar SOFC

2019 ◽  
Vol 7 (1) ◽  
pp. 1977-1986 ◽  
Author(s):  
Chih-Kuang Lin ◽  
Tsung-Ting Chen ◽  
An-Shin Chen ◽  
Yau-Pin Chyou ◽  
Lieh-Kwang Chiang
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Thermal Stress ◽  
Stress Distribution ◽  
Element Analysis ◽  
Thermal Stress Distribution

Surface thermal stress distribution and the influence factors of Sapphire/AlN/GaN epilayers

2016 ◽  
Vol 45 (10) ◽  
pp. 1021001
Author(s):  
陈 靖 Chen Jing ◽  
程宏昌 Cheng Hongchang ◽  
吴玲玲 Wu Lingling ◽  
冯 刘 Feng Liu ◽  
苗 壮 Miao Zhuang
Keyword(s):  
Thermal Stress ◽  
Stress Distribution ◽  
Influence Factors ◽  
Thermal Stress Distribution

scholarly journals The Numerical Modeling of Thermal Stress Distribution in Thermal Barrier Coatings

2017 ◽  
Vol 62 (3) ◽  
pp. 1433-1437
Author(s):  
A. Jasik
Keyword(s):  
Thermal Stress ◽  
Stress Distribution ◽  
Thermal Barrier Coatings ◽  
Bond Coat ◽  
Thermal Spraying ◽  
Ceramic Coatings ◽  
Thermal Barrier ◽  
Insulation Layer ◽  
Barrier Coatings ◽  
Thermal Stress Distribution

Abstract The paper presents the results of numerical calculations of temperature and thermal stress distribution in thermal barrier coatings deposited by thermal spraying process on the nickel based superalloy. An assumption was made to apply conventional zirconium oxide modified with yttrium oxide (8YSZ) and apply pyrochlore type material with formula La2Zr2O7. The bond coat was made of NiCoCrAlY. Analysis of the distribution of temperature and stresses in ceramic coatings of different thicknesses was performed in the function of bond-coat thickness and the type of ceramic insulation layer. It was revealed that the thickness of NiCrAlY bond-coat has not significant influence on the stress distribution, but there is relatively strong effect on temperature level. The most important factor influenced on stress distribution in TBC system is related with type and properties of ceramic insulation layer.

Thermal Analysis of Heating System in Thermosonic Bonding Process

2013 ◽  
Vol 300-301 ◽  
pp. 794-801
Author(s):  
Lu Fan Zhang ◽  
Xue Li Li ◽  
Ji Wen Fang ◽  
Jian Dong Cai ◽  
Long Sheng Nian ◽  
...  
Keyword(s):  
Finite Element Method ◽  
Thermal Analysis ◽  
Thermal Stress ◽  
Thermal Model ◽  
Reference Value ◽  
Heating System ◽  
Bonding Process ◽  
Thermal Displacement ◽  
Process Heating ◽  
Thermal Stress Distribution

A constant temperature range of the heating system plays an important role in the thermosonic bonding process. Heating block will provide enough heat for the heating system. In the paper, the thermal model of heating block and heating system were calculated by finite element method, and then some important conclusions were obtained. The change of temperature and thermal stress of block with the reference value of x and y was obtained. And an optimal structure of block for right temperature was built. The temperature distribution, thermal displacement and thermal stress distribution of the heating block and heating system were disclosed. The relevant change trends of temperature and thermal stress under the different load of temperature were investigated. These results can help improve the reliability of the heating system used in the thermosonic bonding process.

Simulation and Analysis of the Thermal Stress in Concrete under Temperature Fluctuation Condition

2010 ◽  
Vol 168-170 ◽  
pp. 1957-1960
Author(s):  
Ya Ding Zhao ◽  
Xue Ying Li ◽  
Hong Yang Liu
Keyword(s):  
Temperature Field ◽  
Thermal Stress ◽  
Elastic Modulus ◽  
Stress Distribution ◽  
Thermal Gradient ◽  
Structural Dimension ◽  
Temperature Field Distribution ◽  
Air Content ◽  
Thermal Stress Distribution ◽  
The Relationship

The temperature field distribution and thermal stress distribution in concrete has been studied by finite elements method to establish the relationship between the thermal stress and the temperature in this paper. The results show that the maximum thermal gradient and the maximum thermal stress in the concrete appears on the direction of greater structural dimension, and the thermal stress value is positively correlated with thermal gradient or saying temperature difference and elastic modulus, and is negatively correlated with the water content and air content.

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