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Online since: February 2014
Authors: Wen Bo Zeng, Qing Hu Zhang, Guo Fei Zhang, Ping Ping Ding
Table1 AC-16 Synthetic graduation Sieve pore 19 16 13.2 9.5 4.75 2.36 1.18 0.6 0.3 0.15 0.075 Upper limites 100 100 92 80 62 48 36 26 18 14 8 Lower limites 100 90 76 60 34 20 13 9 7 5 4 Average value 100 95.0 84.0 70.0 48.0 34.0 24.5 17.5 12.5 9.5 6.0 Synthetic graduation 100 95.5 84.8 71.5 46.6 27.8 20.8 14.9 10.1 7.5 4.8 Mixture ratio 10~20:5~10:3~5:0~3(machine-made sand):0~3(stone chip):mineral powder =32:22:15:13:13:5 Inspection of coarse aggregates CA value: Lin Xiuxian [5] revised the equation of CA value according to the condition of Chinese road design to: CA= (PD/2-P D/4)/ (100-PD/4) (1) In Eq.1, PD/2 refers to passing rate (%) of D/2 (D refers to maximum nominal grain size), P D/4 refers to passing rate (%) of D/4.
Also, the number of times is treated as fatigue life.
Online since: October 2014
Authors: Ji Soon Kim, Hoang Viet Nguyen, Nguyen Thi Hoang Oanh, Pham Ngoc Dieu Quynh, Tran Quoc Lap
The nanocrystalline and amorphous Al-rich Al–TM–RE alloys with low density and a good corrosion resistance exhibit enhanced properties, such as high strength levels of 1,200÷1,500 MPa [1, 2], compared to the materials in the range of 550÷600 MPa with conventional grain size.
This research is funded by Vietnam National Foundation for Science and Technology Development (NAFOSTED) under grant number 103.02-2012.19.
Online since: January 2015
Authors: Zi Qi Zhang, Wei Jun Cen, Li Na Yuan, Ya Nan Chen
The constitutive relation of interface reflect the relationship between its displacement and stress, On the basis of a large number of tests, scholars have proposed a variety of model.
Above work mostly based on static test, and focused on the study of clay, sand and coarse grained soil, dynamic test is fewer.
Online since: May 2013
Authors: Jun Juan Lv, Long Xin
Table 2 Experimental Procedure of Milling Speed Number 1 2 3 4 5 6 7 8 9 10 11 12 13 Milling speed [m/min] 5 25 50 80 120 160 200 220 240 250 260 280 300 Results and Discussions Fig.3 represented the waveform of three-dimension milling force when Vc=300m/min, Vf=1592mm/min, ap=0.3mm.
The grain becomes thinned and elongated, which makes the extrusion force of the cuttings strong on rake face.
Online since: December 2013
Authors: Pavel Padevět, Petr Bittnar
Material for testing The cement paste is fine grain and homogeneous material [3].
Specimen number Age of material q1 q2 q3 q4 1 4 8.1262∙10-2 -1.0054∙102 9.1978 -3.4482∙10-1 2 4 7.0090∙10-2 -1.116827 1.39287∙10-1 3.8830∙10-2 5 4 -1.3502∙10-1 -1.004849∙102 9.53563 3.1785∙10-1 6 4 -1.70419∙10-1 3.404279 8.7555∙10-2 6.62869∙10-1 1 10 -1.294∙10-3 -3.624∙102 20.094 -9.7565∙10-1 2 10 -1.1861∙10-3 -3.1244∙102 18.055 -8.2269∙10-1 5 10 -9.3783∙10-4 -1.1213∙103 64.75 -3.0668 6 10 -1.7342∙10-4 -1148.3 66.307 -3.1427 The results of experiments correspond with simulation very good, see Fig. 6 to 9.
Online since: September 2014
Authors: Daria B. Lazurenko, Pavel S. Yartsev, Daria I. Lagereva, Lilia I. Shevtsova, Alexander G. Anisimov, Vyacheslav I. Mali
It should be emphasized that the number of layers of low density in specimen obtained according the 2nd regime (5 minutes of heating at 830 oC) significantly decreased.
Froes, Grain growth and recrystallization of nanocrystalline Al3Ti prepared by mechanical alloying.
Online since: September 2014
Authors: Denis G. Kiselev, Evgeniy Valerjevich Korolev, Vladimir Smirnov
When producing such composite the sulfur is used as a binder and different powders, fibers and grains can be used as the disperse phases.
Characteristic energies (at least, by the order of magnitude) must match the ratio of mechanical work required for the compaction of a given volume to a number of particles in this volume.
Online since: August 2013
Authors: Gu Hua Li, Da Zhen Xu, Chun Hui Yu, Jin Liang Gao, Bo Lan, Qun Wei
Currently lacking natural sand resources, compared to natural sand , manufactured-sand porosity is small, but has poor grain shape and size distribution, which makes workability of mortar and low strength grade concrete mixture workability significantly lower, can even affect pump performance of concrete mixture, reduce the apparent quality of the concrete structure.
Fineness modular is 2.6, and methylene blue number MB =1.0,and crusher dust content is12.7%.The performance of sand conforms to the requirements of GB/T 14684-2011.
Online since: July 2015
Authors: Alexander Sitnikov, Yuri Kalinin, Oksana Tarasova, Haider Al Azzawi
A number of studies [2-5] reported the presence of a large perpendicular magnetic anisotropy above the percolation threshold of some compositions samples.
For effective control of structural anisotropy nanosystems during their production is necessary to eliminate the anisotropy of the ferromagnetic grains of composite.
Online since: November 2010
Authors: Giuseppe Lamanna, Vascione Ascione, Luigi Grassia
A great number of variables, such as initial frame length and/or final additional stretch, can influence the stress state of frames determining their life and efficiency under operating loading conditions.
Output definition Non-destructive methods for measuring residual stresses are not easily applicable to noncrystalline materials, large grained materials, nanomaterials, textured or heavily deformed metals.
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