Full field investigation of salt deformation at room temperature

2012 ◽  
Author(s):  
M Bourcier ◽  
A Dimanov ◽  
E Héripré ◽  
J Raphanel ◽  
M Bornert ◽  
...  
Keyword(s):  
Room Temperature ◽  
Field Investigation ◽  
Full Field

An Infrared Interferometer for Elastoplastic Crack-Tip Field Investigation of Homogeneous and Bimaterial Beams: A Study of Three-Dimensional Effects and J-Dominance

1998 ◽  
Vol 65 (4) ◽  
pp. 1032-1041
Author(s):  
J. K. Sinha ◽  
H. V. Tippur
Keyword(s):  
Plane Deformation ◽  
Three Dimensional ◽  
Surface Preparation ◽  
Field Measurements ◽  
Sample Surface ◽  
Field Investigation ◽  
Crack Tip Field ◽  
Full Field ◽  
Infrared Wavelength ◽  
Dimensional Effects

An infrared interferometer capable of performing real-time full-field noncontacting deformation field measurements on optically rough surfaces is proposed as a tool for elastoplastic fracture mechanics investigations. The choice of the infrared wavelength allows interferometric measurements on fracture samples with little or no surface preparation and is more tolerant of the damage accumulation near the crack. The interferometer also bridges a sensitivity gap among existing techniques for out-of-plane deformation measurement. First, a rigorous Fourier optics analysis is provided for the interferometer and the range of surface roughness that can be studied using this interferometer is examined. The interferometer is then used for mapping deformations near elastoplastically deformed cracks in aluminum beams and solder-copper bimaterials. The regions of dominant three-dimensional effects and J-dominance are examined on the sample surface by evaluating measurements along with companion finite element analyses and the HRR fields.

Far-Infrared Thermal Desorption of Sandy Soil and its Mechanism

2012 ◽  
Vol 518-523 ◽  
pp. 2147-2150
Author(s):  
Guo Long Gao ◽  
Jian Guo Jiang ◽  
Ye Xiao ◽  
Lian Bi Zhou
Keyword(s):  
Water Content ◽  
Thermal Desorption ◽  
Sandy Soil ◽  
Material Balance ◽  
Far Infrared ◽  
Field Investigation ◽  
Full Field ◽  
Desorption Temperature ◽  
Desorption Time ◽  
Condensed Liquid

A full-field investigation was conducted of far-infrared thermal desorption of sandy soil polluted by r-Hexachlorocyclohexane (RH). The effects of thermal desorption time, temperature, vacuum and water content on the thermal desorption efficiency (CE) were determined. CE of RH is increasing with the increasing of thermal desorptionSubscript text time, temperature, vacuum. The optimum thermal desorption conditions for sandy soil are as follows: thermal desorption time 10 minutes, thermal desorption temperature 200°C, vacuum 0.05MPa and water content 15%.The material balance was basically realized, and most RH lies in condensed liquid.

Field Investigation on Thermal Performance of the Tile Ventilator

2014 ◽  
Vol 619 ◽  
pp. 73-77 ◽  
Author(s):  
Konglit Juengpimonyanon ◽  
Withaya Puangsombut ◽  
Thana Ananacha
Keyword(s):  
Thermal Performance ◽  
Room Temperature ◽  
Construction Materials ◽  
Field Investigation ◽  
Heat Accumulation ◽  
Roof Tile ◽  
Ceiling Temperature ◽  
Solar Intensity ◽  
Ventilation Pattern ◽  
Common House

This paper investigates the thermal performance of the tile ventilator for attic ventilation to reduce ceiling heat gain into space room. Two small houses were built using common construction materials; one common house served as reference and the other was used to test in experiments. The external ventilation pattern was considered. The inlet air openings are located at eaves and the outlet air at the tile ventilators. The results were performed that the tile ventilator is effective for reducing attic air temperature, ceiling temperature and also room temperature. Due to solar intensity during daytime, the tile ventilator could decrease heat accumulation in attic space. However, it is suitable for promoting to integrate on the roof tile.

Thermal Desorption Remediation of Soil Highly Polluted by 1,2-Dichloroethane in China

2011 ◽  
Vol 356-360 ◽  
pp. 1131-1134 ◽  
Author(s):  
Guo Long Gao ◽  
Jian Guo Jiang
Keyword(s):  
Thermal Desorption ◽  
Clay Soil ◽  
Type System ◽  
Field Investigation ◽  
Technological Parameters ◽  
Residual Concentration ◽  
Full Field ◽  
Desorption Time ◽  
System Temperature ◽  
Remediation Of Soil

A full-field investigation was conducted of thermal desorption remediation of soil polluted by 1, 2-dichloroethane (1, 2-DCA). The effects of soil type, system temperature, thermal desorption time, and stirring speed on the residual concentration of 1, 2-DCA were determined. The residual concentration of 1, 2-DCA decreased with increasing viscosity, system temperature, thermal desorption time, and stirring speed. Optimal thermal desorption conditions for moderately polluted clay soil were a system temperature of 130°C and thermal desorption time of 50 min with stirring. Optimal thermal desorption conditions for heavily polluted clay soil were a system temperature of 130°C and thermal desorption time of 90 min with stirring. This study provides technological parameters and theoretical guidance for engineering.

Vacuum-Enhanced Far-Infrared Thermal Desorption of Clay Soil Polluted by R-Hexachlorocyclohexane

2012 ◽  
Vol 518-523 ◽  
pp. 1716-1719
Author(s):  
Guo Long Gao ◽  
Jian Guo Jiang ◽  
Ye Xiao ◽  
Lian Bi Zhou
Keyword(s):  
Mass Balance ◽  
Water Content ◽  
Thermal Desorption ◽  
Active Carbon ◽  
Clay Soil ◽  
Far Infrared ◽  
Field Investigation ◽  
Desorption Rate ◽  
Desorption Process ◽  
Full Field

A full-field investigation was conducted of vacuum-enhanced far-infrared thermal desorption of clay soil polluted by r-Hexachlorocyclohexane (RH). It demonstrated that vacuum-enhanced far-infrared thermal desorption process is effective for remediating RH contaminated clay soil. The thermal desorption rate (CE) were improved under such conditions: thermal desorption time 20 minutes, thermal desorption temperature 200 °C, vacuum 0.05MPa and water content 15%. The mass balance of RH was verified after 20min of reaction. The residue RH was distributed in the condensate, whereas the soil and active carbon contained lower amounts of RH.

scholarly journals Oxygen/nitrogen-assisted embrittlement of titanium alloys exposed at elevated temperature

2020 ◽  
Vol 321 ◽  
pp. 06004
Author(s):  
D. Texier ◽  
Q. Sirvin ◽  
V. Velay ◽  
M. Salem ◽  
D. Monceau ◽  
...  
Keyword(s):  
Tensile Strength ◽  
Titanium Alloys ◽  
Diffusion Zone ◽  
Room Temperature ◽  
Image Correlation ◽  
High Solubility ◽  
Full Field ◽  
Macroscopic Deformation ◽  
Solubility Of Oxygen ◽  
Fracture Features

Due to high solubility of oxygen and nitrogen in titanium alloys, the influence of the diffusion zone on the macroscopic tensile properties of pre-oxidized annealed Ti-6Al-4V tensile specimens was examined at room temperature. Thin microtensile specimens were prepared with different thicknesses ranging from 100 µm to 500 µm and then exposed at 750°C for durations between 5 and 200h. A dedicated gripping technique was developed in the present study to investigate the brittleness of such pre-oxidized and ultrathin specimens at room temperature. Tensile testing was paired with digital image correlation techniques to assess both macroscopic deformation and full-field strain maps. High temperature pre-oxidation treatments significantly decreased the ductility of the specimen and the tensile strength of the materials (yield strength and ultimate tensile strength). Fractographic examinations revealed typical brittle fracture features in the oxygen/nitrogen-affected diffusion zone in the periphery of the cross-section while the fracture remained ductile in the core of the specimen for most of the specimens. Some specimens fully failed in a brittle manner for “(pre-ox. duration)1/2/thickness” configurations with ratio equal or higher than 0.45 h1/2.µm-1.

Identification of Local Viscoplastic Properties in P91 Welds from Full Field Measurements at Room Temperature and 625 °C

2012 ◽  
Vol 53 (3) ◽  
pp. 455-468 ◽  
Author(s):  
M. Touboul ◽  
J. Crepin ◽  
G. Rousselier ◽  
F. Latourte ◽  
S. Leclercq
Keyword(s):  
Room Temperature ◽  
Field Measurements ◽  
Full Field ◽  
Viscoplastic Properties

Salmonella Typhimurium outbreak associated with a contaminated food container in a school in Sichuan Province, China

2015 ◽  
Vol 144 (2) ◽  
pp. 285-290 ◽  
Author(s):  
L. G. LIU ◽  
X. Y. ZHOU ◽  
Z. LAN ◽  
L. LI ◽  
Z. LI ◽  
...  
Keyword(s):  
High School ◽  
High School Students ◽  
Room Temperature ◽  
Boarding School ◽  
Field Investigation ◽  
Sichuan Province ◽  
School Students ◽  
Food Container ◽  
Source Of Infection ◽  
Contaminated Food

SUMMARYOn 13 June 2013, a fever and diarrhoea outbreak occurred in a boarding school in Sichuan Province. We conducted a field investigation and compared food exposure of 81 case students and 104 control students (years 7 and 8) in order to identify the source of infection. There were 401 cases identified (399 students and two cooks). The attack rates were 23–46% in nursery, primary, and secondary schools, but 0% in the high school. Eighty-five percent of case students, consumed cowpea salad compared to 60% of control students at lunch on 12 June (odds ratio 3·1, 95% confidence interval 1·3–7·8). The cowpeas were stored at room temperature for 3 h in a bucket previously used to store raw ingredients. The bucket was cleaned using water without a disinfectant. There were two buckets of cowpea, one for the high-school students and another for the other students. This Salmonella outbreak was likely caused by the cowpea salad due to cross-contamination via a storage bucket.

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