“Time-varying model” and macroscopic / microcosmic mechanism analysis based on corroded steel mechanical property of bridge durability

2018 ◽  
Vol 529 (1) ◽  
pp. 128-134 ◽  
Author(s):  
Zeng Ding ◽  
Zeng Qihui ◽  
Hao Baohong ◽  
Zhao Jin ◽  
Tang Yuchen
Keyword(s):  
Mechanical Property ◽  
Time Varying ◽  
Mechanism Analysis ◽  
Microcosmic Mechanism

Properties Research and Mechanism Analysis of Polypropylene Fiber Reinforced FGD Gypsum Composites

2013 ◽  
Vol 662 ◽  
pp. 339-342
Author(s):  
Hong Pan ◽  
Guo Zhong Li
Keyword(s):  
Mechanical Property ◽  
Polyvinyl Alcohol ◽  
Stearic Acid ◽  
Polypropylene Fiber ◽  
Strength Loss ◽  
Mechanism Analysis ◽  
Fiber Reinforced ◽  
Fgd Gypsum ◽  
Action Mechanisms ◽  
Scanning Electron

Polypropylene fiber, stearic acid-polyvinyl alcohol emulsion and FGD gypsum were chosen to prepare fiber reinforced FGD gypsum composites by a certain process. The effects of polypropylene fiber and stearic acid-polyvinyl alcohol emulsion on the composites were observed, and their action mechanisms were also analyzed with physical molds of waterproofing mechanism established. QUANTA FEG 250 scanning electron microscope was used to observe the microcosmic morphology of the samples. The investigations indicated that the mechanical property of fiber reinforced FGD gypsum composites was enhanced by admixture with polypropylene fiber while the water-resistant property was improved by adding the organic emulsion which could make the strength loss induced.

Mechanical Property Analysis of High-Rise Building on Construction

2011 ◽  
Vol 243-249 ◽  
pp. 1122-1126
Author(s):  
Shu Ping Cong ◽  
Jin Sheng Han
Keyword(s):  
Mechanical Properties ◽  
Mechanical Property ◽  
Geometrical Model ◽  
Analysis Tool ◽  
Time Varying ◽  
Construction Process ◽  
Life And Death ◽  
High Rise ◽  
Property Analysis ◽  
High Rise Building

Mechanical properties of high-rise building on construction and on service life are different. Geometrical model of structure and material property are time-varying on construction, so mechanical property analysis of high-rise building on construction is complex. The software of ANSYS is selected as the analysis tool. Construction process of high-rise building is simulated through the element “life and death” function of ANSYS. Results of analog calculation are close to the actual values of structure because of considering the construction process. It is beneficial to the safety of high-rise building on construction.

Thermomechanical Treatment of a 4340 Ni-Cr-Mo Alloy Steel

1981 ◽  
Vol 39 ◽  
pp. 314-315 ◽  
Author(s):  
M.T. Jahn ◽  
J.C. Yang ◽  
C.M. Wan
Keyword(s):  
Mechanical Property ◽  
Chemical Composition ◽  
Alloy Steel ◽  
Thermomechanical Treatment ◽  
Room Temperature ◽  
Good Combination ◽  
Thermal Treatments ◽  
Low Carbon ◽  
4340 Steel ◽  
Good Improvement

4340 Ni-Cr-Mo alloy steel is widely used due to its good combination of strength and toughness. The mechanical property of 4340 steel can be improved by various thermal treatments. The influence of thermomechanical treatment (TMT) has been studied in a low carbon Ni-Cr-Mo steel having chemical composition closed to 4340 steel. TMT of 4340 steel is rarely examined up to now. In this study we obtain good improvement on the mechanical property of 4340 steel by TMT. The mechanism is explained in terms of TEM microstructures4340 (0.39C-1.81Ni-0.93Cr-0.26Mo) steel was austenitized at 950°C for 30 minutes. The TMTed specimen (T) was obtained by forging the specimen continuously as the temperature of the specimen was decreasing from 950°C to 600°C followed by oil quenching to room temperature. The thickness reduction ratio by forging is 40%. The conventional specimen (C) was obtained by quenching the specimen directly into room temperature oil after austenitized at 950°C for 30 minutes. All quenched specimens (T and C) were then tempered at 450, 500, 550, 600 or 650°C for four hours respectively.

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