scholarly journals Constant-Pressure and Constant-Volume Direct Shear Characteristics of Reinforced Sand

1998 ◽  
Vol 13 ◽  
pp. 296-305
Author(s):  
Jin-Ying Qiu ◽  
F. Tatsuoka ◽  
T. Uchimura
Keyword(s):  
Constant Pressure ◽  
Constant Volume ◽  
Direct Shear ◽  
Reinforced Sand ◽  
Shear Characteristics

scholarly journals Constant Pressure and Constant Volume Direct Shear Tests on Reinforced Sand

2000 ◽  
Vol 40 (4) ◽  
pp. 1-17 ◽  
Author(s):  
Jin-Ying Qiu ◽  
Fumio Tatsuoka ◽  
Taro Uchimura
Keyword(s):  
Constant Pressure ◽  
Constant Volume ◽  
Direct Shear ◽  
Shear Tests ◽  
Reinforced Sand ◽  
Direct Shear Tests

scholarly journals Sand- and Clay-Photocured-Geomembrane Interface Shear Characteristics Using Direct Shear Test

2021 ◽  
Vol 13 (15) ◽  
pp. 8201
Author(s):  
Lihua Li ◽  
Han Yan ◽  
Henglin Xiao ◽  
Wentao Li ◽  
Zhangshuai Geng
Keyword(s):  
Soil Surface ◽  
Friction Angle ◽  
Direct Shear ◽  
Tensile Crack ◽  
Shear Tests ◽  
Interface Shear ◽  
Direct Shear Tests ◽  
Carbon Black Powder ◽  
Shear Characteristics ◽  
Impermeable Layer

It is well known that geomembranes frequently and easily fail at the seams, which has been a ubiquitous problem in various applications. To avoid the failure of geomembrane at the seams, photocuring was carried out with 1~5% photoinitiator and 2% carbon black powder. This geomembrane can be sprayed and cured on the soil surface. The obtained geomembrane was then used as a barrier, separator, or reinforcement. In this study, the direct shear tests were carried out with the aim to investigate the interfacial characteristics of photocured geomembrane–clay/sand. The results show that a 2% photoinitiator has a significant effect on the impermeable layer for the photocured geomembrane–clay interface. As for the photocured geomembrane–sand interface, it is reasonable to choose a geomembrane made from a 4% photoinitiator at the boundary of the drainage layer and the impermeable layer in the landfill. In the cover system, it is reasonable to choose a 5% photoinitiator geomembrane. Moreover, as for the interface between the photocurable geomembrane and clay/sand, the friction coefficient increases initially and decreases afterward with the increase of normal stress. Furthermore, the friction angle of the interface between photocurable geomembrane and sand is larger than that of the photocurable geomembrane–clay interface. In other words, the interface between photocurable geomembrane and sand has better shear and tensile crack resistance.

scholarly journals Reinforcing Mechanism Constant Pressure Direct Shear Tests on Sand

1999 ◽  
Vol 14 ◽  
pp. 185-194
Author(s):  
Po-Kai Wu ◽  
Jin-Ying Qiu ◽  
T. Uchimura ◽  
F. Tatsuoka
Keyword(s):  
Constant Pressure ◽  
Direct Shear ◽  
Shear Tests ◽  
Direct Shear Tests

scholarly journals On the temperature variation of the specific heats of hydrogen and nitrogen

1930 ◽  
Vol 126 (801) ◽  
pp. 204-212 ◽  
Keyword(s):  
Kinetic Theory ◽  
Temperature Variation ◽  
Characteristic Equation ◽  
Constant Pressure ◽  
Ideal Gas ◽  
Constant Volume ◽  
Specific Heats

The energy of a gram molecule of an ideal gas can be calculated from the kinetic theory. From this, by the application of the Maxwell-Boltzmann hypothesis, the molecular specific heats at constant volume, S v , of ideal monatomic and diatomic gases are deduced to be 3R /2 and 5R/2 respectively at all temperatures. R is the gas constant per gram molecule = 1⋅985 gm. cal./° C. The corresponding molecular specific heats at constant pressure, S p , can be obtained by the addition of R. In the case of real gases, which obey some form of characteristic equation other than P. V = R. T, it can be shown from thermodynamical considera­tions that the value of S p depends upon the pressure, but as the term involving the pressure also includes the temperature, S p is not independent of the tempera­ture but it increases in value as the temperature is reduced. Assuming the characteristic equation proposed by Callendar, i. e. , v - b ­­= RT/ p - c (where b is the co-volume, c is the coaggregation volume which is a function of the temperature of the form c = c 0 (T 0 /T) n , n being dependent on the nature of the gas), it is easy to show from the relation (∂S p /∂ р ) T = -T(∂ 2 ν /∂Τ 2 ) р , hat S p = S p 0 + n (n + 1) cp /T; and, by combining this with S p – S v = T(∂ p /∂Τ) v (∂ v /∂Τ) p = R(1 + ncp /RT) 2 , the corresponding values of S v can be obtained.

scholarly journals Thermodynamics and dynamics of a monoatomic glass former. Constant pressure and constant volume behavior

2008 ◽  
Vol 128 (14) ◽  
pp. 144505 ◽  
Author(s):  
Vitaliy Kapko ◽  
Dmitry V. Matyushov ◽  
C. Austen Angell
Keyword(s):  
Constant Pressure ◽  
Constant Volume ◽  
Thermodynamics And Dynamics
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