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Online since: December 2016
Authors: Radka Pernicová, Daniel Dobiáš
Concrete is dense, homogeneous, with max grain size up to 22 mm, on the cut surfaces of the bore a greater number of macropores within 4-6 mm has been observed.
Online since: July 2022
Authors: Shigeru Hamada, Wan Jia Li
Although the physics-based crystal plasticity model incorporating many mechanisms (dislocation motion, twinning induced plasticity, non-crystalline shear band, etc.) has many advantages, it has a significant disadvantage: the increasing number of material constitutive parameters.
Symbol Description Value Units Elastic parameters C11 C12 C44 Single crystal elastic constants 168.4 121.4 75.4 GPa Slip parameters dgrain bS Average grain size Burgers vector for slip 3 × 10-5 2.55 × 10-10 m m QS* Activation energy for slip 4.0 × 10-19 J QC Activation energy for climb 2.7 × 10-19 J Ω Activation volume for climb 1.0 bS3 m3 p Top of obstacle profile 1.03 - q Bottom of obstacle profile 1.0 - islip Average dislocation spacings a dislocation travels 10.0 - v0 Dislocation slip velocity 1.0 × 10-4 m/s D0 Self-diffusion coefficient for fcc Fe 2.0 × 10-5 m3/s τsol* Solid solution strength 14.2 × 106 Pa ρ0 ρdip0 Initial dislocation density Initial dipole density 1.0 × 1012 1.0 m-3 m-3 Twin parameters btw Burgers vector for twinning 1.47 × 10-10 m Ltw* Length of twin nuclei in Burgers vectors 520.0 × btw m itw Average twin spacings a dislocation travel 1.0 - ttw Average twin thickness 1.5 × 10-7 m γsf Stacking fault energy at zero K 0.042 J/m3 VCS Cross-slip activation
Online since: July 2010
Authors: Ying Cheng Hu, Fang Chao Cheng, Li Zhang, Jin Li, Xu Jie Zhang
Table 3 Results of Orthogonal Experiment Number Depth of Tanks[mm] Glue Spread [g/m 2] Adhesive Type Ultimate Tension[N] 1 12 140 PVAc 1184.5 2 12 160 MDI 1437.0 3 12 180 PVAc 1557.0 4 12 200 MDI 1287.3 5 9 160 PVAc 1546.0 6 9 140 MDI 1364.5 7 9 200 PVAc 1421.3 8 9 180 MDI 1238.0 9 6 180 PVAc 1920.3 10 6 200 MDI 1585.3 11 6 140 PVAc 1428.3 12 6 160 MDI 1569.7 13 15 200 PVAc 1314.0 14 15 180 MDI 1392.7 15 15 160 PVAc 1139.0 16 15 140 MDI 1364.5 600 800 1000 1200 1400 1600 1800 3 6 9 12 15 18 Depth of The Tanks[mm] Ultimate Tension[N] 1200 1250 1300 1350 1400 1450 1500 1550120 140 160 180 200 220 Glue Spread[g/m 2 ] Ultimate Tension[N] Fig.4 Effect caused by different depth of tanks on ultimate tension of wood I-joists.
(2) The main destructional form is the fracture in the direction parallel to grain on the flanges which was mainly caused by adhesive type.
Online since: May 2014
Authors: Franz Dieter Fischer, Jiří Svoboda, Ernst Kozeschnik, Yao V. Shan
Ongoing work is presently done for accounting different numbers (1 to 6) of substitutional foreign atoms, situated in the nearest vicinity of the trap, influencing the depth of the trap and defining the sort of the traps.
Hodgson, Grain size effect on the warm deformation behavior of a Ti-IF steel, Mater.
Online since: September 2020
Authors: Khairul Nizar Ismail, Fatihah Halim
Over a past few years, the existing inner and outer structure of LWA, especially the microstructure of the LWA and cement paste of concrete has been the subject of a number of research publications [2].
The starting point of the ITZ lies in the so called divider impact sourced by the aggregate particles, where the aggregates will show up locally level to the cement grains and disturb their packing.
Online since: December 2008
Authors: V.L. Goncharov, Y.V. Lakhotkin, V.P. Kuzmin, J. Roth, Vladimir K. Alimov
X-ray diffraction analysis has revealed that the size of the CVD tungsten carbides grains varies from 3 to 20 nm.
The operating ability of the multilayer coating depends on the number of layers, their microhardness and thickness.
Online since: May 2012
Authors: Guang Sheng Bian, Fang Cheng, Zong Cai Li, Tao Fan
Introduction Shandong provincial museum is located in Jinan yanshan overpass Edom 1.5 km, the construction area is about 82980 m2, building structure categories is for I class, and design use fixed number of year is for 100 years.
Construction site 150 mm thick grain concrete pavement can't meet the demand of large crawler crane walk. 400 t crawler crane walk by adopts transverse laid roadbed area of box foundation reinforcement and ensure that way longitudinal slope is less than 12°, horizontal slope is less than 5°.
Online since: February 2011
Authors: Yun Li, Chen Xue Wang, You Shang, Ping Chang, Lina Jia
Fe2O3 particles might have been reacted with massive hydroxyl groups from SiO2, this inference can be confirmed through the 1103cm-1 Si-O-Si stretching vibration peak moved to lower wave number of 1086cm-1 [8].
And the smaller the grain diameter is, the stronger the UV absorption capacity is.
Online since: July 2006
Authors: Zhan Qiang Liu, Yi Wan, Xing Ai
The content, grain size, binding phase and so on have great effects on the cutting performance of PCBN.
Five group inserts were employed and the results were average number.
Online since: May 2011
Authors: Fang Qiang Chang, Quan Sun
The fine grained soil at the Mississippi River estuary and the Yellow River estuary can be treated as Tresca materials, so the thin layer of rigid body (shearing failure part) deformation can be divided into translational and rotational movement.
In the example, the still water depth is 8.0m, under one 50-year reappearing period wind, the mean wavelength is 70.6m, then 10 average of 70.6 of the Rayleigh distributed random numbers are generated, such as: [77.8 15.4 26.8 124.3 132.9 38.0 89.9 130.5 69.1 168.1] m.
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