Experimental Study on the Influence of Temperature and Confined Load on the Creep Characteristics of Geogrid

2014 ◽  
Vol 912-914 ◽  
pp. 1629-1632
Author(s):  
Zhen Zhang
Keyword(s):  
Experimental Study ◽  
Temperature Factor ◽  
Testing Equipment ◽  
Creep Tests ◽  
Influence Of Temperature ◽  
Creep Characteristics ◽  
Two Factors ◽  
Different Temperatures ◽  
Temperature Factors

This paper describes a new testing equipment developed to perform geogrid creep tests under confined load and in different temperatures simultaneously, and the confined load and temperature factors’ influence on the creep characteristics of geogrid was researched systemically , then the tests data was dealt by correlation analysis.The results shows that :the influence of confined load on geogrid creep is very significant, creep tests under no confined load will produce conservative results .The influence of confined load is weaker than the influence of temperature factor. The both two factors must be considered in geogrid creep tests .

Experimental study on influence of temperature and C-rate of discharge on performance of in-house fabricated 30Ah Li-ion prismatic cell made with LFP and MCMB

2021 ◽  
pp. 1-20
Author(s):  
T. V. S. L. Satyavani ◽  
Mathiyazhagan Senthilkumar ◽  
G. Dharma Prasad Rao ◽  
Navneet Kumar ◽  
Adapaka Srinivas Kumar
Keyword(s):  
Experimental Study ◽  
Lithium Iron Phosphate ◽  
Electrochemical Impedance ◽  
Temperature Drop ◽  
Lithium Ion ◽  
High Rate ◽  
Transfer Resistance ◽  
Influence Of Temperature ◽  
Different Temperatures ◽  
Li Ion

Abstract Experimental study was carried out to quantify the influence of temperature and different C-rate of discharge on in-house fabricated Lithium-ion (Li-ion) cell. 30Ah Li-ion cell is made of Lithium Iron Phosphate (LFP) cathode and Meso Carbon Micro Beads (MCMB) anode in prismatic configuration. Capability of Li-ion cell is defined by discharge capacity, voltage & power at different C-rate of discharge. Influence of 4 different current rates (C/5, C/2, 1C & 2C) at 5 different temperatures (−20, 0, 20, 40 and 60 °C) were studied. High discharge rate increases current density of cell which affect mass transport at electrode surface and electrolyte. Increased ohmic and concentration polarization at high rate of discharge decrease the original capacity. Average discharge voltage of cell is reduced gradually as operating temperature drop to below 20 °C. Electrochemical Impedance (EI) were measured on Li-ion cell in different frequency domain at different temperatures (−20, 0, 20 and 60 °C). The obtained impedance spectra were examined with an equivalent circuit using Zman software. The ohmic and charge transfer resistance displayed a solid dependence with respect to temperature.

scholarly journals Theoretical and experimental study of the influence of temperature, humidity and density on the processes of drying, cleaning and filtration of cotton raw materials

2021 ◽  
Vol 1 (4) ◽  
pp. 8-15
Author(s):  
Sirojiddin Fayziev ◽  
Nafisa To’raeva ◽  
Sitora Fatullayeva
Keyword(s):  
Experimental Study ◽  
Raw Materials ◽  
Air Flow ◽  
Moisture Loss ◽  
Air Velocity ◽  
Influence Of Temperature ◽  
Loss Process ◽  
Existing Problems ◽  
Different Temperatures ◽  
Laboratory Device

The article presents information about existing problems and their solutions in the process of drying cotton raw materials at cotton gin plants, patterns of changes in the humidity of cotton raw materials at different values of the warm air velocity are obtained. The influence of the density of cotton raw materials and the relative air velocity on the change in the moisture loss coefficient at different temperatures of the air flow was investigated and it was established using a laboratory device that at a density of 0.5 g/cm3, the moisture loss process in cotton raw materials.

Freeze-Thaw Cycle under the Conditions of Creep Tests of Plastics Geogrid

2012 ◽  
Vol 170-173 ◽  
pp. 317-321
Author(s):  
En Liang Wang ◽  
Bin Zhang ◽  
Jun De Chang
Keyword(s):  
Low Temperature ◽  
Impact Factor ◽  
Freezing And Thawing ◽  
Creep Tests ◽  
Thawing Cycle ◽  
Thaw Cycle ◽  
Creep Characteristics ◽  
Freeze Thaw Cycle ◽  
Different Temperatures ◽  
The One

Through testing the creep characteristics of plastic geogrid under the temperature of 20°C，10°C，0°C and -20°C, we obtained the creep characteristics curve under the different temperature.In order to obtioning the creep regulations of plastic geogrid by freezing and thawing cycle , we made the plastic geogrid for10 times freezing and thawing cycle at -20°C - 20°C, the one which was tested under the temperature of 20°C until its deformation became stable. Conclusions: (1) The creep of the plastic geogrid under different temperatures is quite different, it is greatly influenced by temperature and the lower the temperature the smaller the creep value; freezing and thawing cycle have influence in creep characteristics,In the condition of freezing and thawing cycle,while the creep value get stable at the normal temperature, the creep value also increasing with the temperature getting high and decreasing with temperature getting low; (2) According to the creep regulations under low temperature and freezing and thawing cycle condition,we advance the counting method of impact factor of freezing and thawing cycle, DR and creep impact factor of low temperature FcR.

scholarly journals Influence of temperature on leukocyte kinetics during cardiopulmonary bypass and postoperative organ damage: an experimental study

Critical Care ◽  
10.1186/cc174 ◽  
1998 ◽  
Vol 2 (Suppl 1) ◽  
pp. P044
Author(s):  
Ma Qing ◽  
MC Seghaye ◽  
J Vazquez ◽  
RG Grabitz ◽  
B Klosterhalfen ◽  
...  
Keyword(s):  
Experimental Study ◽  
Cardiopulmonary Bypass ◽  
Organ Damage ◽  
Influence Of Temperature ◽  
Influence Of Temperature On

Evaluation of the Heat Treatment Role for Light Aluminum Alloys Subjected to Creep and Low Cycle Fatigue

2010 ◽  
Vol 638-642 ◽  
pp. 455-460 ◽  
Author(s):  
A. Rutecka ◽  
L. Dietrich ◽  
Zbigniew L. Kowalewski
Keyword(s):  
Mechanical Properties ◽  
Heat Treatment ◽  
Low Cycle Fatigue ◽  
Numerical Models ◽  
Cyclic Hardening ◽  
Fatigue Tests ◽  
Cycle Fatigue ◽  
Lower Stress ◽  
Creep Tests ◽  
Different Temperatures

The AlSi8Cu3 and AlSi7MgCu0.5 cast aluminium alloys of different composition and heat treatment were investigated to verify their applicability as cylinder heads in the car engines [1]. Creep tests under the step-increased stresses at different temperatures, and low cycle fatigue (LCF) tests for a range of strain amplitudes and temperatures were carried out. The results exhibit a significant influence of the heat treatment on the mechanical properties of the AlSi8Cu3 and AlSi7MgCu0.5. An interesting fact is that the properties strongly depend on the type of quenching. Lower creep resistance (higher strain rates) and lower stress response during fatigue tests were observed for the air quenched materials in comparison to those in the water quenched. Cyclic hardening/softening were also observed during the LCF tests due to the heat treatment applied. The mechanical properties determined during the tests can be used to identify new constitutive equations and to verify existing numerical models.

scholarly journals Creep behaviour and life assessment of a cast nickel – base superalloy MAR – M247

2019 ◽  
Vol 38 (2019) ◽  
pp. 590-600
Author(s):  
Marie Kvapilova ◽  
Jiri Dvorak ◽  
Petr Kral ◽  
Karel Hrbacek ◽  
Vaclav Sklenicka
Keyword(s):  
Creep Behaviour ◽  
Life Assessment ◽  
Dislocation Creep ◽  
Nickel Base Superalloy ◽  
Creep Characteristics ◽  
Different Temperatures ◽  
High Temperature Components ◽  
Lower Temperature ◽  
Nickel Base ◽  
Different Grain Size

AbstractThe cast nickel-base MAR-M247 superalloy has been widely used for high-temperature components. In this work, the creep behaviour of two alternates of MAR-M247 superalloy with different grain size processed at different temperatures of casting are compared. Under the creep testing conditions used in this study, only negligible differences of creep behaviour of the alternate alloys were found and the evaluated creep characteristics correspond to the power-law or dislocation creep. The microstructure of the alloys consists of a𝛾matrix with a eutectic,𝛾'strengthening cubic precipitates, and M6C and M23C6carbides. Increasing the temperature induces the dissolution of some M23C6carbides. Fractures of both variants of alloys exhibit a more ductile character at higher temperatures, while at lower temperature a mixture of brittle and ductile fracture modes was observed, which changes the creep fracture ductility.

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