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Online since: January 2013
Authors: Ya Jun Wang, Zhi Hong Dong, Xiao Qing Gan, Chang Yu Wu
Table 1 Measured Values for Creep Parameters of Fully Graded Concrete of Xiluodu Arch Dam Mark: C18035, Age:90d
Duration for Recoverable Creep
/d
Recoverable Creep
/10-6/MPa
Fitted Parameters
Duration for Unrecoverable Creep
/d
Unrecoverable Creep
/10-6/MPa
Fitted Parameters
1
2
A0
4.51443
84
6.8
D
28
2
2.2
A1
25.26697
90
7.1
m3
0.01148
3
2.4
A2
0.53611
120
7.5
4
2.6
B0
3.06571
180
8.3
5
2.8
B1
13
360
10.4
6
3
B2
0.91332
7
3.1
m1
0.01
14
3.8
m2
0.3
21
4.5
28
5
35
5.2
42
5.4
49
6
56
6.4
The compound exponential distribution for creep function of C18035 at age 90d is expressed in Eq. 1.
The numerically fitted curves are showed in Fig.1 and Fig.2
(1) Fig. 1 Fitted Curve for Recoverable Creep of C18035 at age 90d Fig. 2 Fitted Curve for Unrecoverable Creep of C18035 at age 90d Table 2 Measured Values for Creep Parameters of Fully Graded Concrete of Xiluodu Arch Dam Mark: C18035, Age:180d Duration for Recoverable Creep /d Recoverable Creep /10-6/MPa Fitted Parameters Duration for Unrecoverable Creep /d Unrecoverable Creep /10-6/MPa Fitted Parameters 1 0.6 A0 5 84 4 D 45.44927 2 1 A1 53 90 4.6 m3 0.0102 3 1.1 A2 1 120 5.1 4 1.3 B0 -1.30505 180 6 5 1.5 B1 35.87193 360 7.1 6 1.6 B2 0.49821 7 1.7 m1 0.008 14 2.1 m2 0.5 21 2.1 28 2.2 35 2.6 42 3 49 3.1 56 3.3 The compound exponential distribution for creep function of C18035 at age 180d is expressed in Eq. 2.
References [1] Y.
Zhang, Super Gravity Dam Generalized Damage Study, Advanced Materials Research. 479-481 (2012) 421-435 [4] Y.
The numerically fitted curves are showed in Fig.1 and Fig.2
(1) Fig. 1 Fitted Curve for Recoverable Creep of C18035 at age 90d Fig. 2 Fitted Curve for Unrecoverable Creep of C18035 at age 90d Table 2 Measured Values for Creep Parameters of Fully Graded Concrete of Xiluodu Arch Dam Mark: C18035, Age:180d Duration for Recoverable Creep /d Recoverable Creep /10-6/MPa Fitted Parameters Duration for Unrecoverable Creep /d Unrecoverable Creep /10-6/MPa Fitted Parameters 1 0.6 A0 5 84 4 D 45.44927 2 1 A1 53 90 4.6 m3 0.0102 3 1.1 A2 1 120 5.1 4 1.3 B0 -1.30505 180 6 5 1.5 B1 35.87193 360 7.1 6 1.6 B2 0.49821 7 1.7 m1 0.008 14 2.1 m2 0.5 21 2.1 28 2.2 35 2.6 42 3 49 3.1 56 3.3 The compound exponential distribution for creep function of C18035 at age 180d is expressed in Eq. 2.
References [1] Y.
Zhang, Super Gravity Dam Generalized Damage Study, Advanced Materials Research. 479-481 (2012) 421-435 [4] Y.
Online since: December 2014
Authors: Guo Hua Zhou
Equation(1)is shown as follows:
(1)
Among (1), is defined as follows:
is defined as follows:
As maximum, is used to be punitive value, if the constraint condition can’t be satisfy, the punishment will be done.
3-D ENCODING IN GA
When GA was used in job shop scheduling.
Diagonal elements are filled with 0, the remaining elements are filled with-1, as shown in Figure2; B.
Figure 1.
References [1] Arora JS, Huang M W, Hsieh CC.
[2] Nakano R, Yamada T, “Conventional genetic algorithms for job-shop problems”, Proceedings of the Fourth International Conference on Genetic Algorithms, Morgan Kaufmann, San Mateo, 1991, pp. 477–479
Diagonal elements are filled with 0, the remaining elements are filled with-1, as shown in Figure2; B.
Figure 1.
References [1] Arora JS, Huang M W, Hsieh CC.
[2] Nakano R, Yamada T, “Conventional genetic algorithms for job-shop problems”, Proceedings of the Fourth International Conference on Genetic Algorithms, Morgan Kaufmann, San Mateo, 1991, pp. 477–479
Online since: September 2007
Authors: Kai Feng Zhang, Jun Ting Luo, Qing Zhang
Results show that sintered body consists of Si2N2O
and β-Si3N4, with an average grain size about 1µm.
Physical properties of the powders are listed in Table 1.
The average grain size of sintered body is less than 1µm.
References [1] I.W.
Mater Vol. 15 (2003), p1006 [9] Junting Luo,Kaifeng Zhang: Materials Science Forum Vol.475-479 (2004), p2987 [10] Junting Luo,Kaifeng Zhang.
Physical properties of the powders are listed in Table 1.
The average grain size of sintered body is less than 1µm.
References [1] I.W.
Mater Vol. 15 (2003), p1006 [9] Junting Luo,Kaifeng Zhang: Materials Science Forum Vol.475-479 (2004), p2987 [10] Junting Luo,Kaifeng Zhang.
Online since: June 2015
Authors: Oleg V. Sharkov, Sergei Koryagin, Nikolay Velikanov
Introduction
Ratchet tooth is used in a variety of mechanisms for load transfer by normal forces [1-5].
(3) Fig.1.
References [1] R.C.
Applied Mechanics and Materials. 479-480 (2014) 304-308
Mechanism and Machine Theory. 73 (2014) 1-24
(3) Fig.1.
References [1] R.C.
Applied Mechanics and Materials. 479-480 (2014) 304-308
Mechanism and Machine Theory. 73 (2014) 1-24
Online since: September 2013
Authors: Fareed Ahmed, Faheem Ahmed, Yong Yang
Introducton
Discontinuous Galerkin method (DGM) [1] has been widely used in computational fluid dynamics for the past few decades.
CFL number of 1 was used.
Fig.1 shows a triangular grid over NACA 0012 airfoil.
Fig.1 NACA0012 airfoil computational grid.
Hill: Triangular Mesh Methods for the Neutron Transport Equation, Tech. report LA-UR-73-479, Los Alamos Scientific Laboratory, (1973)
CFL number of 1 was used.
Fig.1 shows a triangular grid over NACA 0012 airfoil.
Fig.1 NACA0012 airfoil computational grid.
Hill: Triangular Mesh Methods for the Neutron Transport Equation, Tech. report LA-UR-73-479, Los Alamos Scientific Laboratory, (1973)
Online since: June 2010
Authors: Feng Zhou, Chun H. Wang, Adrian P. Mouritz
Mouritz1,b
1
School of Aerospace, Mechanical and Manufacturing Engineering, RMIT University, Australia.
The microvascular vessels were thin-walled hollow glass fibres with varying diameters up to 680 microns were embedded in the laminate; an example is shown in Figure 1.
As seen in Figure 1, the presence of the hollow fibres increased ply waviness, which in turn reduces the compressive and Figure 1 Cross-sectional view of a composite laminate containing a hollow fibre of 640-micons [5] tensile strengths when above a threshold size.
References [1] S.R.
Solomon, Progress in Polymer Science, 33, (2008), 479-522
The microvascular vessels were thin-walled hollow glass fibres with varying diameters up to 680 microns were embedded in the laminate; an example is shown in Figure 1.
As seen in Figure 1, the presence of the hollow fibres increased ply waviness, which in turn reduces the compressive and Figure 1 Cross-sectional view of a composite laminate containing a hollow fibre of 640-micons [5] tensile strengths when above a threshold size.
References [1] S.R.
Solomon, Progress in Polymer Science, 33, (2008), 479-522
Online since: February 2013
Authors: Ya Jun Wang, Jin Ting Wang, Zhi Hong Dong, Xiao Qing Gan
The fuzzy stochastic damage index function is expressed in Eq. 1
The whole non-linear constitution was adopted here for damage evaluation and the representative test process curve is showed in Fig. 1.
Fig. 1 Uni-axial Compression Test Process Curve Numerical Results of Modal analysis on Xiluodu Arch Dam Fig. 2 Numerical Grid Model for Xiluodu Arch Dam Modal Analysis The finite element gird model is showed in Fig. 2. there live two kinds of element for it, namely, hexahedral element and wedge element.
References [1] Y.
Zhang, Super Gravity Dam Generalized Damage Study, Advanced Materials Research. 479-481 (2012) 421-435 [5] Y.
The whole non-linear constitution was adopted here for damage evaluation and the representative test process curve is showed in Fig. 1.
Fig. 1 Uni-axial Compression Test Process Curve Numerical Results of Modal analysis on Xiluodu Arch Dam Fig. 2 Numerical Grid Model for Xiluodu Arch Dam Modal Analysis The finite element gird model is showed in Fig. 2. there live two kinds of element for it, namely, hexahedral element and wedge element.
References [1] Y.
Zhang, Super Gravity Dam Generalized Damage Study, Advanced Materials Research. 479-481 (2012) 421-435 [5] Y.
Online since: July 2011
Authors: Shu Fan Wang, Xiao Tian Wang, Xiang Yang Zou, Yong Wen
The detecting target is a 1-watt continuous semiconductor laser, the wavelength is 0.82 micrometers.
The experimental layouts see Fig.1.
Fig.1 61 units adaptive optical system Compensation errors analysis Series of errors results from the correction of adaptive optical system to light beam wavefront disturbance, and mainly include the following: Wavefront detecting errors.
Theoretical analysis shows that wavefront detecting errors are inversed of the square of SNR of the detector, and can be expressed as (1) Which is a factor, is signal to noise ratio
Am.A 10, 1993, 646-660 [5] Dessenne,C., Model prediction for closed-loop adaptive optics, Opt.Lett. 20, 1997, 1535-1537 [6] Sechaud, Wavefront sensing in imaging through the atmosphere: a detector strategy, SPIE, Vol.1543, 1991, 479-490 [7] G.Rousset, First diffraction-limited astronomical images with adaptive optics, Astron.and Astrophys., Vol.230, 1990, 29-32
The experimental layouts see Fig.1.
Fig.1 61 units adaptive optical system Compensation errors analysis Series of errors results from the correction of adaptive optical system to light beam wavefront disturbance, and mainly include the following: Wavefront detecting errors.
Theoretical analysis shows that wavefront detecting errors are inversed of the square of SNR of the detector, and can be expressed as (1) Which is a factor, is signal to noise ratio
Am.A 10, 1993, 646-660 [5] Dessenne,C., Model prediction for closed-loop adaptive optics, Opt.Lett. 20, 1997, 1535-1537 [6] Sechaud, Wavefront sensing in imaging through the atmosphere: a detector strategy, SPIE, Vol.1543, 1991, 479-490 [7] G.Rousset, First diffraction-limited astronomical images with adaptive optics, Astron.and Astrophys., Vol.230, 1990, 29-32
Online since: December 2012
Authors: Pei Fang Cheng, Wen Ming Ren, Xue Feng Liu
The WVP (g·mm·m-2·s-1·Pa-1) was calculated by Eq. 1
Table.1 The WVTR values of films Films Cellophane PET PET/PT WVTR(g·m-2·day-1) 24.525 5.225 5.668 It can be seen from Table 1 that the WVTR values of ordinary Cellophane was 24.525 g/m2·24h.
References [1] Carol A Phillips.
International Journal of Food and Science and Technology, 1996, 31:463-479
Critical Reviews in Food Science and Nutrition, 1989, 28(1):1-30
Table.1 The WVTR values of films Films Cellophane PET PET/PT WVTR(g·m-2·day-1) 24.525 5.225 5.668 It can be seen from Table 1 that the WVTR values of ordinary Cellophane was 24.525 g/m2·24h.
References [1] Carol A Phillips.
International Journal of Food and Science and Technology, 1996, 31:463-479
Critical Reviews in Food Science and Nutrition, 1989, 28(1):1-30
Online since: February 2012
Authors: Li Jun Wang, Chun Fei Guo, Min Zhang
Fig.1 shows the magnetizing technique for yoke in according to the standard DIN_EN_1290-2002.
For longitudinal cracks For transverse cracks Fig.1 Yoke magnetizing techniques for fillet weld Theoretical background The MFL problem can be treated as a magnetostatic problem by using of magnetic scalar potential method.
In the domain of a magnetostatic field problem, a solution is sought which satisfies the Maxwell Eq (1) and (2).
(a) Horizontal component, Bx (b) Vertical component, By Fig. 6 The influence of distance S on MFL density Conclusions 1) The magnetic flux density at the center of flaw decreases abruptly as the air gap under yoke pole increases, so the suggestion is that the air gap should not be above 1.5mm during the practical detection process. 2) When the distance S of fillet weld away from magnetic poles increases, the MFL density decreases.
References [1] Huang Zuoying, Que Peiwen, Chen Liang, 3D FEM analysis in magnetic flux leakage method, NDT&E International 2006;39;61-66 [2] F.I Al-Naemi, J.P.Hall, A.J.Moses, FEM modeling techniques of magnetic flux leakage-type NDT for ferromagnetic plate inspections, Journal of Magnetic Material, 2006;304;790-793 [3] M.Katoh, K.Nishio, T.Yamaguchi, FEM study on the influence of air gap and specimen thickness on the detestability of flaw in the yoke method, NDT&E International 2000;33;333-339 [4] Mitsuaki Katoh, Modeling of the yoke-magnetization in MFL-testing by finite elements, NDT&E International 2003;36;479-486 [5] M.Katoh, K.Nishio, The influence of modeled B-H curve on the density of the magnetic leakage flux due to a flaw using yoke-magnetization, NDT&E International 2004;32;603-609
For longitudinal cracks For transverse cracks Fig.1 Yoke magnetizing techniques for fillet weld Theoretical background The MFL problem can be treated as a magnetostatic problem by using of magnetic scalar potential method.
In the domain of a magnetostatic field problem, a solution is sought which satisfies the Maxwell Eq (1) and (2).
(a) Horizontal component, Bx (b) Vertical component, By Fig. 6 The influence of distance S on MFL density Conclusions 1) The magnetic flux density at the center of flaw decreases abruptly as the air gap under yoke pole increases, so the suggestion is that the air gap should not be above 1.5mm during the practical detection process. 2) When the distance S of fillet weld away from magnetic poles increases, the MFL density decreases.
References [1] Huang Zuoying, Que Peiwen, Chen Liang, 3D FEM analysis in magnetic flux leakage method, NDT&E International 2006;39;61-66 [2] F.I Al-Naemi, J.P.Hall, A.J.Moses, FEM modeling techniques of magnetic flux leakage-type NDT for ferromagnetic plate inspections, Journal of Magnetic Material, 2006;304;790-793 [3] M.Katoh, K.Nishio, T.Yamaguchi, FEM study on the influence of air gap and specimen thickness on the detestability of flaw in the yoke method, NDT&E International 2000;33;333-339 [4] Mitsuaki Katoh, Modeling of the yoke-magnetization in MFL-testing by finite elements, NDT&E International 2003;36;479-486 [5] M.Katoh, K.Nishio, The influence of modeled B-H curve on the density of the magnetic leakage flux due to a flaw using yoke-magnetization, NDT&E International 2004;32;603-609