Defects Detection in Concrete Structure with Infrared Thermal Imaging and Numerical Simulation

2011 ◽  
Vol 378-379 ◽  
pp. 345-348
Author(s):  
Hong Guo Xu ◽  
Zhong He Shui ◽  
Bo Chen ◽  
Wei Chen ◽  
Sha Ding
Keyword(s):  
Finite Element ◽  
Temperature Field ◽  
Finite Element Simulation ◽  
Thermal Imaging ◽  
Concrete Structure ◽  
Infrared Imaging ◽  
Imaging Method ◽  
Infrared Thermal Imaging ◽  
Element Simulation ◽  
Nondestructive Testing Method

In this paper, infrared imaging and temperature sensor monitoring equipment are used to detect the defect of concrete. By means of experiment and numerical analysis, a nondestructive testing method for concrete based on infrared thermal imaging and the finite element simulation of temperature field was established. Experimental and simulation results show that infrared thermal imaging method and the finite element simulation of temperature field can effectively detect the defect in the sample. When combining such two methods together, the information of internal concrete structure can be revealed more comprehensively and accurately.

Finite Element Simulation for Temperature Field of Nickels-based Alloy Based on DLMS

Applied laser ◽  
2010 ◽  
Vol 30 (4) ◽  
pp. 284-290
Author(s):  
凡进军 Fan Jinjun ◽  
赵剑峰 Zhao Jianfeng
Keyword(s):  
Finite Element ◽  
Temperature Field ◽  
Finite Element Simulation ◽  
Element Simulation

scholarly journals Finite element simulation and microstructure analysis of nickel based alloy for additive manufacturing

2018 ◽  
Vol 242 ◽  
pp. 01022
Author(s):  
Liu Heping ◽  
Sun Fenger ◽  
Yibo Fenger ◽  
Cheng Shaolei ◽  
Liu Bin
Keyword(s):  
Finite Element ◽  
Temperature Field ◽  
Temperature Gradient ◽  
Heat Source ◽  
Finite Element Simulation ◽  
Molten Pool ◽  
Laser Melting ◽  
Front End ◽  
Element Simulation ◽  
Laser Heat Source

In this paper, the finite element simulation of GH4169 high temperature alloy by selective laser melting was carried out, and the microstructure was analyzed by experiments. The results show that the shape of the temperature field cloud formed by the laser heat source is different from the shape of the theoretical model, but is in the shape of the ellipse. The temperature gradient at the front end of the molten pool is larger than that of the back end of the molten pool, and the isotherm of the front end of the molten pool is more intensive. The temperature of the substrate is less affected by the temperature gradient. The temperature gradient of the front end of the melting pool is larger than the back end of the molten pool, and the temperature field of selective laser melting is like a meteor with trailing tail. In the laser heat source, the temperature isotherm is the most dense and the temperature gradient is maximum. The relative effect of mechanical properties of δ phase is very complex. When the phase is precipitated by widmanstatten structure, it is easy to produce stress concentration as a source of cracks

Finite Element Simulation of Temperature Field in Plunge Milling Ti-6A1-4V at Cooling Condition

2011 ◽  
Vol 4 (3) ◽  
pp. 824-829
Author(s):  
Xuda Qin ◽  
Hao Jia ◽  
Xiaolai Ji ◽  
Xiaotai Sun ◽  
Qi Wang
Keyword(s):  
Finite Element ◽  
Temperature Field ◽  
Finite Element Simulation ◽  
Cooling Condition ◽  
Plunge Milling ◽  
Element Simulation

Test and Finite Element Simulation of Steady-State Temperature Field of Rolling Tire

2012 ◽  
Vol 236-237 ◽  
pp. 536-542 ◽  
Author(s):  
Xiang Lei Duan ◽  
Shu Guang Zuo ◽  
Yong Li ◽  
Chen Fei Jiang ◽  
Xue Liang Guo
Keyword(s):  
Finite Element ◽  
Temperature Field ◽  
Steady State ◽  
Finite Element Simulation ◽  
Temperature Rise ◽  
Tire Pressure ◽  
Speed Factor ◽  
Element Simulation ◽  
Steady State Temperature ◽  
Single Factor Analysis

To analyze the steady-state temperature field, a three-factor orthogonal test was taken to study comprehensively how the load, speed and tire pressure can influence the tire temperature. The finite element simulation was carried out according to the uncoupled idea. Based on the single-factor analysis towards the speed factor, the actual convection coefficient of different boundaries was determined to calculate the steady-state temperature field at last. These analyses indicate that the tire temperature rise increase with the factor of load and speed, decrease with the increase of the initial tire pressure. The load has the biggest influence on the tire temperature rise, while the speed has the least. With the combination of steady-state temperature field and heat generation rate distribution, all these high-temperature regions can be explained clearly from the finite element perspective.

Finite Element Simulation of Hydration Heat Using Fuzzy Logic Model of Hydration

2016 ◽  
Vol 677 ◽  
pp. 157-162
Author(s):  
Jitka Mádlová ◽  
Petr Štemberk ◽  
Alena Kohoutkova
Keyword(s):  
Finite Element ◽  
Fuzzy Logic ◽  
Finite Element Simulation ◽  
Concrete Structure ◽  
Heat Of Hydration ◽  
Logic Model ◽  
Hydration Heat ◽  
Maximum Temperature ◽  
Fuzzy Logic Model ◽  
Element Simulation

This paper deals with heat of hydration in a concrete structure at the early age. The influence of temperature on development of hydration heat in the concrete structure is implemented through a fuzzy-logic model of the degree of hydration. The transient heat transfer problem was solved as a three-dimensional finite element simulation. The whole process of calculation is implemented in MATLAB Environment. The result of this work provides temperature distribution in the structure for each time step, the maximum temperature in the structure, and the time when it occurs.

Research on Finite Element Simulation and Experiment of Temperature Field for Surface Cutting of Nanostructured WC/12Co Coatings

2012 ◽  
Vol 522 ◽  
pp. 167-172 ◽  
Author(s):  
Zhao Hui Deng ◽  
Qiao Ping Wu ◽  
Lin Lin Wan ◽  
Zhan Pan ◽  
Gao Feng Zhang
Keyword(s):  
Finite Element ◽  
Temperature Field ◽  
Finite Element Simulation ◽  
Cutting Temperature ◽  
Element Model ◽  
Thermal Source ◽  
Element Simulation ◽  
Simulation And Experiment ◽  
Machining Properties ◽  
The Mathematical Model

To investigate the distribution of cutting temperature for surface cutting of nanastructured WC/12Co coating used the PDC cutter, according to machining properties of WC/12Co coating and working conditions, on the basis of the theory of thermal equilibrium of moving thermal source, the mathematical model of temperature field was established through reasonable hypothesis. Simulations were performed for the temperature distribution on the surface and inside the WC/12Co coating specimen using finite element method. And experiment of surface temperature of WC/12Co coating used the PDC cutter was carried out. The finite element simulation results were in good agreement with the experiment data, which verified the validation and capability of the finite element model.

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