Thermal-induced upheaval buckling of concrete pavements incorporating the effects of temperature gradient

2018 ◽  
Vol 164 ◽  
pp. 316-324 ◽  
Author(s):  
Guotao Yang ◽  
Mark A. Bradford
Keyword(s):  
Temperature Gradient ◽  
Concrete Pavements ◽  
Upheaval Buckling ◽  
Effects Of Temperature

EFFECTS OF TEMPERATURE GRADIENT ON LAMELLAR ORIENTATIONS OF DIRECTIONAL SOLIDIFIED TiAl--BASED ALLOY

2011 ◽  
Vol 46 (10) ◽  
pp. 1223-1229 ◽  
Author(s):  
Zhixia XIAO ◽  
Lijing ZHENG ◽  
Lili YANG ◽  
Jie YAN ◽  
Hu ZHANG
Keyword(s):  
Temperature Gradient ◽  
Effects Of Temperature

From thin films to shaped platelets: effects of temperature gradient on SnS synthesis

2020 ◽  
pp. 138507
Author(s):  
Thiago Carvalho ◽  
Myriano H. Oliveira ◽  
R. Magalhães-Paniago ◽  
Andre Santarosa Ferlauto
Keyword(s):  
Thin Films ◽  
Temperature Gradient ◽  
Effects Of Temperature

Effects of temperature gradient reduction: Comparison of Drägersorb 800 Plus®, Drägersorb Free® and Amsorb Plus®

2008 ◽  
Vol 25 (Sup 44) ◽  
pp. 31
Author(s):  
G. Hirabayashi ◽  
H. Uchino ◽  
T. Nakajima ◽  
A. Kitagawa ◽  
N. Ishii
Keyword(s):  
Temperature Gradient ◽  
Effects Of Temperature

Foundation Modeling for Jointed Concrete Pavements

2000 ◽  
Vol 1730 (1) ◽  
pp. 34-42 ◽  
Author(s):  
William G. Davids
Keyword(s):  
Finite Element ◽  
Temperature Gradient ◽  
Load Transfer ◽  
Plain Concrete ◽  
Positive Temperature ◽  
Concrete Pavements ◽  
Finite Element Program ◽  
Joint Load ◽  
Foundation Type ◽  
Dense Liquid

Issues related to the finite element modeling of base and subgrade materials under jointed plain concrete pavements are examined. The threedimensional finite element program EverFE, developed in conjunction with the Washington State Department of Transportation, was employed for the analyses. The relevant modeling capabilities of EverFE are detailed, including the ability to model multiple foundation layers, the incorporation of loss of contact between slab and base, and the efficient iterative solution strategies that make large three-dimensional finite element analyses possible on desktop computers. The results of parametric studies examining the effects of foundation type (layered elastic and dense liquid) and properties on the response of jointed plain concrete pavements subjected to axle and thermal loads are presented. Special attention is paid to the interactions between joint load transfer effectiveness and foundation type, and joint load transfer is shown to change significantly with different foundation models and properties. A consideration of simultaneous thermal and axle loadings indicates that the effect of foundation type and properties on critical slab stresses caused by edge loading and a positive temperature gradient is relatively small. However, the slab response is quite sensitive to foundation type for a combined negative temperature gradient and corner loading. On the basis of these results, use of an equivalent dense liquid foundation modulus in mechanistic rigid pavement analysis or design is not recommended when stiff base layers are present.

scholarly journals Effects of temperature gradient and particle size on self-ignition temperature of low-rank coal excavated from inner Mongolia, China

2019 ◽  
Vol 6 (9) ◽  
pp. 190374 ◽  
Author(s):  
Yongjun Wang ◽  
Xiaoming Zhang ◽  
Hemeng Zhang ◽  
Kyuro Sasaki
Keyword(s):  
Activation Energy ◽  
Particle Size ◽  
Temperature Gradient ◽  
Ignition Temperature ◽  
Coal Particle ◽  
Critical Value ◽  
Low Rank ◽  
Low Rank Coal ◽  
Coal Particles ◽  
Effects Of Temperature

This study investigates the effects of temperature gradient and coal particle size on the critical self-ignition temperature T CSIT of a coal pile packed with low-rank coal using the wire-mesh basket test to estimate T CSIT based on the Frank–Kamenetskii equation. The values of T CSIT , the temperature gradient and the apparent activation energy of different coal pile volumes packed with coal particles of different sizes are measured. The supercriticality or subcriticality of the coal is assessed using a non-dimensional index I HR based on the temperature gradient at the temperature cross-point between coal and ambient temperatures for coal piles with various volumes and particle sizes. The critical value I HRC at the boundary between supercriticality and subcriticality is determined as a function of pile volume. The coal status of supercritical or subcritical can be separated by critical value of I HR as a function of pile volume. Quantitative effects of coal particle size on T CSIT of coal piles are measured for constant pile volume. It can be concluded that a pile packed with smaller coal particles is more likely to undergo spontaneous combustion, while the chemical activation energy is not sensitive to coal particle size. Finally, the effect of coal particle size on T CSIT is represented by the inclusion of an extra term in the equation giving T CSIT for a coal pile.

Effects of temperature gradient reduction in three different carbon dioxide absorbents

2009 ◽  
Vol 26 (6) ◽  
pp. 469-474 ◽  
Author(s):  
Go Hirabayashi ◽  
Hiroyuki Uchino ◽  
Takao Nakajima ◽  
Yukihiko Ogihara ◽  
Nagao Ishii
Keyword(s):  
Carbon Dioxide ◽  
Temperature Gradient ◽  
Effects Of Temperature
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