A comparison of pressuremeter test results in sea ice

1994 ◽  
Vol 31 (2) ◽  
pp. 254-260 ◽  
Author(s):  
A. Steel ◽  
J.I. Clark ◽  
P. Morin
Keyword(s):  
Mechanical Properties ◽  
Sea Ice ◽  
Ice Sheets ◽  
Confining Pressure ◽  
Test Results ◽  
Short Term ◽  
Pressuremeter Test ◽  
Field Environment ◽  
Field Assessment ◽  
The Given

The results of short-term pressuremeter tests from three different sea ice environments are presented. These results are used to derive mechanical properties of the ice, to compare the ice types, and to evaluate the Texam pressuremeter as an instrument for the field assessment of ice sheets and ice packs. The results are also compared with those existing in the literature. It was found that the strength of the sea ice was affected most significantly by temperature, but also by salinity and to a lesser extent by confining pressure and ice structure. The Texam pressuremeter operated well in the given field environment and will prove to be a valuable piece of equipment for determining the characteristics of these important ice formations. Key words : pressuremeter, sea ice, short-term tests, strength, salinity, confining pressure, temperature.

Experimental Analysis of Mechanical Properties of High Organic Soft Clay at Different Depths

2014 ◽  
Vol 1056 ◽  
pp. 52-57
Author(s):  
Fei Liu ◽  
Jun Song Chen ◽  
Kai Wen Li
Keyword(s):  
Mechanical Properties ◽  
Northeast China ◽  
Soft Clay ◽  
Confining Pressure ◽  
Test Results ◽  
Shear Tests ◽  
Formation Stage ◽  
Good Guide ◽  
Different Depths ◽  
Clay Layers

In this study, with regard to the differences of formation stage and physicochemical properties for different high organic soft clay layers, a series of laboratory tests have been carried out to evaluate the mechanical properties of high organic soft clay in Northeast China. The conventional high-pressure consolidation and strain-controlled triaxial shear tests have been carried out to measure the compression and shear strength of high organic soft clay which formed in different ages. Furthermore, the comparisons of stress-strain relations between undisturbed and remoulded high organic soft clay samples under the confining pressure of 300kPa reveal the significant differences in compression and shear strengths of high organic soft clay at different depths, which can be interpreted by the differences in the degree of decomposition of the soil. The test results show that the degree of decomposition of high organic soft clay greatly depend on its formation stage at different depths, which is deemed to determine the mechanical properties. This study will provide a good guide to civil engineers on the constructions of the foundation.

Modeling Mechanical Properties of Multilayer Coatings TiAlN

2021 ◽  
Vol 410 ◽  
pp. 578-584
Author(s):  
Vladimir I. Kolesnikov ◽  
Tatiana V. Suvorova ◽  
Olga A. Belyak
Keyword(s):  
Mechanical Properties ◽  
The Self ◽  
Nanoindentation Test ◽  
Multilayer Coatings ◽  
Test Results ◽  
Margin Of Error ◽  
Differential Scheme ◽  
The Given ◽  
Consistency Method ◽  
Self Consistency

The paper outlines two approaches (the ANSYS finite element modeling and the differential scheme of the self-consistency method) to model the mechanical properties of TiAlN multilayer coatings. To validate the experimental results, these findings were compared with the nanoindentation test results for single and multilayer coatings. This work has revealed the effect of Ti/Al ratio on the mechanical properties of multilayer coatings. The given approaches could be applied to calculate, with an acceptable margin of error, the mechanical properties of TiAlN multilayer coatings.

Research on Rheological Properties of Room-Temperature Curing Epoxy Adhesive

2013 ◽  
Vol 639-640 ◽  
pp. 354-358 ◽  
Author(s):  
Hui Li ◽  
Ying She Luo ◽  
Jian Jun Xie ◽  
Sheng Ming Chen
Keyword(s):  
Mechanical Properties ◽  
Rheological Model ◽  
Room Temperature ◽  
Epoxy Adhesive ◽  
Test Results ◽  
Short Term ◽  
Creep Tests ◽  
C 30 ◽  
Term Creep ◽  
Short Term Creep

The rheological mechanical properties of two kinds of self-designed epoxy adhesive curing systems were studied in this paper through the dynamic and static thermodynamics instrument named EPLEXOR 500N made by GABO® company in Germany. Short-term creep tests were carried out under three different temperature conditions of 20°C, 30°C and 40°C and the rheological model is developed to describe the materials creep law. In addition, the test results from the two different epoxy adhesive are also compared and analyzed.

Soft Rock Roadway Mesh Shell Lining Experimental Study of the Mechanical Properties

2013 ◽  
Vol 671-674 ◽  
pp. 774-777 ◽  
Author(s):  
Hong Xia Li ◽  
Yong Wei Wang ◽  
Bai Xiao Tang
Keyword(s):  
Mechanical Properties ◽  
Soft Rock ◽  
Confining Pressure ◽  
Test Results ◽  
Underground Engineering ◽  
High Level ◽  
Theoretical Test ◽  
Soft Rock Roadway ◽  
Rock Roadway ◽  
Reliable Basis

Similar model experiment under confining pressure, research latticed shell lining the mechanical properties and the carrying capacity of new support for the underground engineering - network shell support, according to the model experiments and theoretical. Test results prove that the the latticed shell supporting structure has good mechanical properties and a high level of support is a reliable form of support. Can make up for the deficiencies of the existing soft rock roadway structure, calculated to provide a reliable basis for mesh shell lining theoretical analysis.

The mechanical properties of sea ice — A compilation of available data

1984 ◽  
Vol 11 (4) ◽  
pp. 884-923 ◽  
Author(s):  
Luc Lainey ◽  
René Tinawi
Keyword(s):  
Mechanical Properties ◽  
Sea Ice ◽  
Elastic Moduli ◽  
Shear Tests ◽  
Short Term ◽  
Relaxation Functions ◽  
Multiaxial Compression ◽  
Tension And Compression ◽  
Ice Strength

The mechanical properties of S2- and S3-type sea ice are reviewed. Strength and, in some cases, elastic moduli are presented for short-term loadings. The loadings considered are uniaxial tension and compression and multiaxial compression; annular tests as well as flexural and shear tests were also reported. The parameters that influence the values are also described. These are the grain diameter and orientation, loading rate, temperature, salinity, and density, as well as the size of the specimens and whether these are obtained in the field or are laboratory grown. The long-term mechanical properties are also presented. Creep laws or relaxation functions are given whenever available. The results of the compilation are presented in a tabulated form for each type of loading. A short discussion is also given for each mechanical property. Key words: sea ice mechanical properties, sea ice strength, sea ice modulus, sea ice creep, sea ice behaviour.

Mechanical Properties of Sandstone under Loading and Unloading Conditions

2014 ◽  
Vol 852 ◽  
pp. 441-446 ◽  
Author(s):  
Xing Xia Wang ◽  
Wen Juan Ma ◽  
Jian Wen Huang ◽  
Zai Yi Liao
Keyword(s):  
Mechanical Properties ◽  
Triaxial Compression ◽  
Deformation Modulus ◽  
Confining Pressure ◽  
Rock Deformation ◽  
Test Results ◽  
Compression Tests ◽  
Triaxial Compressive Strength ◽  
Unloading Confining Pressure ◽  
Triaxial Compression Tests

The mechanical properties of rock mass under unloading conditions are essentially different from that under loading conditions. Triaxial compression tests and unloading confining pressure tests are conducted, and test results show that unloading failure is more brittle, and rock samples suffer more damage under unloading failure. The larger the initial confining pressure is, the easier of unloading failure is occurred. The increasing or decreasing values of rock deformation modulus under unloading conditions are within 10% of rock triaxial compressive strength. Unloading failure leads to deterioration of rock deformation modulus, which decreases gradually with confining pressure decreasing, and the decrease rates get bigger and bigger with unloading ratio of confining pressure increasing. Deformation modulus is only 24-34% of that under loading condition when rock strength goes down to residual strength.

scholarly journals Performance Evaluation of Warm Asphalt Mixtures Containing Chemical Additive and Effect of Incorporating High Reclaimed Asphalt Content

Materials ◽  
2021 ◽  
Vol 14 (14) ◽  
pp. 3793
Author(s):  
Mukul Rathore ◽  
Viktors Haritonovs ◽  
Martins Zaumanis
Keyword(s):  
Test Results ◽  
Short Term ◽  
Chemical Additive ◽  
Reclaimed Asphalt ◽  
Specimen Test ◽  
Wheel Tracking Test ◽  
Indirect Tensile ◽  
Asphalt Content ◽  
Wheel Tracking ◽  
The Given

Reclaimed asphalt (RA) and Warm mix asphalt (WMA) are two widely used environmentally friendly mixtures in the paving industry. This study compares the laboratory performance of conventional hot mix asphalt (HMA) with virgin WMA, and WMA containing 60% RA content, using thermal stress restrained specimen test, wheel tracking test, and indirect tensile strength test. Based on test results, a reduction of 15 °C in mixing temperature was achieved for WMA mixtures compared to HMA using the given chemical additive. The virgin WMA mixture showed superior cracking resistance but lower rutting resistance than HMA, and incorporation of RA material without any further modification in the binder, deteriorated both cracking and rutting performance of WMA. It was also shown that laboratory short-term aging can significantly affect the performance of the mixtures.

Sunlight exposure: the effects on the performance of paragliding fabric

2018 ◽  
Vol 69 (05) ◽  
pp. 381-389
Author(s):  
MENGÜÇ GAMZE SÜPÜREN ◽  
TEMEL EMRAH ◽  
BOZDOĞAN FARUK
Keyword(s):  
Mechanical Properties ◽  
Aging Process ◽  
Air Permeability ◽  
Sunlight Exposure ◽  
Test Results ◽  
Coating Materials ◽  
Strength Tests ◽  
Before And After ◽  
The Relationship ◽  
Dark Blue

This study was designed to explore the relationship between sunlight exposure and the mechanical properties of paragliding fabrics which have different colors, densities, yarn counts, and coating materials. This study exposed 5 different colors of paragliding fabrics (red, turquoise, dark blue, orange, and white) to intense sunlight for 150 hours during the summer from 9:00 a.m. to 3:00 p.m. for 5 days a week for 5 weeks. Before and after the UV radiation aging process, the air permeability, tensile strength, tear strength, and bursting strength tests were performed. Test results were also evaluated using statistical methods. According to the results, the fading of the turquoise fabric was found to be the highest among the studied fabrics. It was determined that there is a significant decrease in the mechanical properties of the fabrics after sunlight exposure. After aging, the fabrics become considerably weaker in the case of mechanical properties due to the degradation in both the dyestuff and macromolecular structure of the fiber

scholarly journals Discrete Element Simulation Analysis of Biaxial Mechanical Properties of Concrete with Large-Size Recycled Aggregate

2021 ◽  
Vol 13 (13) ◽  
pp. 7498
Author(s):  
Tan Li ◽  
Jianzhuang Xiao
Keyword(s):  
Mechanical Properties ◽  
Stress State ◽  
Strain Curve ◽  
Confining Pressure ◽  
Recycled Concrete ◽  
Recycled Aggregate Concrete ◽  
Recycled Aggregate ◽  
Recycled Aggregates ◽  
Aggregate Model ◽  
Large Size

Concrete made with large-size recycled aggregates is a new kind of recycled concrete, where the size of the recycled aggregate used is 25–80 mm, which is generally three times that of conventional aggregate. Thus, its composition and mechanical properties are different from that of conventional recycled concrete and can be applied in large-volume structures. In this study, recycled aggregate generated in two stages with randomly distributed gravels and mortar was used to replace the conventional recycled aggregate model, to observe the internal stress state and cracking of the large-size recycled aggregate. This paper also investigated the mechanical properties, such as the compressive strength, crack morphology, and stress–strain curve, of concrete with large-size recycled aggregates under different confining pressures and recycled aggregate incorporation ratios. Through this research, it was found that when compared with conventional concrete, under the confining pressure, the strength of large-size recycled aggregate concrete did not decrease significantly at the same stress state, moreover, the stiffness was increased. Confining pressure has a significant influence on the strength of large-size recycled aggregate cocrete.

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