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Online since: September 2008
Authors: Ephrahim Garcia, Emily Leylek, Justin Manzo
The joint is a composite that
makes use of three materials: shape memory alloy (SMA) as face sheets, shape memory polymer
(SMP) for core material, and nichrome wire to provide additional heating.
Next, the structure is strategically cooled in such a way as to retain as much of the contraction as possible while the materials revert back to their cooled states.
"T th AIAA/ASME/ASCE/AHS/ASC Structures, Structural Dynamics, and Materials Conference an Exhibit, (1998).
"Evaluating t rd on aircraft performance," AIAA-2002-1631, 43 AIAA/ASME/ASCE/AHS/ASC Structures, Structural Dynamics, and Materials Conference, (2002).
"Comparison of Morphing Wing S th AIAA/ASME/ASCE/AHS/ASC Structures, Structural Dynamics, and Materials Conferenc (2004).
Next, the structure is strategically cooled in such a way as to retain as much of the contraction as possible while the materials revert back to their cooled states.
"T th AIAA/ASME/ASCE/AHS/ASC Structures, Structural Dynamics, and Materials Conference an Exhibit, (1998).
"Evaluating t rd on aircraft performance," AIAA-2002-1631, 43 AIAA/ASME/ASCE/AHS/ASC Structures, Structural Dynamics, and Materials Conference, (2002).
"Comparison of Morphing Wing S th AIAA/ASME/ASCE/AHS/ASC Structures, Structural Dynamics, and Materials Conferenc (2004).
Online since: June 2010
Authors: Na Jia, Chang Liu
Self-adsorption fiber board is a new type of functional wood-based panel belonging to the
category of functional compound material, which utilizes the composite element functional
processing method [9].
Physical and Mechanical Performance of Self-adsorption fiber board Amount of added activated carbon Density [g/cm 3] Bending strength [MPa] Elastic modulus [MPa] Internal bond strength [MPa] 24h water absorption thickness expansion rate [%] No addition 0.76 30.04 2350.72 0.30 13.95 3% powder 0.78 30.61 2265.98 0.38 15.60 5% powder 0.78 31.26 2360.06 0.41 16.10 10% powder 0.79 34.04 2526.26 0.45 18.95 3% grain 0.78 30.43 2312.87 0.42 14.78 5% grain 0.79 32.46 2257.87 0.59 15.15 10% grain 0.81 32.16 2315.88 0.56 9.70 (2)Test on formaldehyde release of self-adsorption fiber board In accordance with the regulation of GB /T18580-2001 Indoor Decorating and Refurbishing Materials-Limit of Formaldehyde Emission of Wood-based Panels and Finishing Products, the drier method is adopted to test the formaldehyde emission of self-adsorption fiber board . 0 0.2 0.4 0.6 0.8 1 Amount of addition % F o r m a l d e h y d e e
Discussion Physical and mechanical performance The composition element of self-adsorption fiber board is added with activated carbon, especially the activated carbon grain, which plays a role in reinforcing composite material, therefore, theoretically, the mechanical performance of the panel will be improved.
Forest Products Journal, 1999, 49(1):49-55 [4] Jack D Thrasher, Kaye H Kilburn.
Jiangsu Environmental Science and Technology (supplement 2): 43-45
Physical and Mechanical Performance of Self-adsorption fiber board Amount of added activated carbon Density [g/cm 3] Bending strength [MPa] Elastic modulus [MPa] Internal bond strength [MPa] 24h water absorption thickness expansion rate [%] No addition 0.76 30.04 2350.72 0.30 13.95 3% powder 0.78 30.61 2265.98 0.38 15.60 5% powder 0.78 31.26 2360.06 0.41 16.10 10% powder 0.79 34.04 2526.26 0.45 18.95 3% grain 0.78 30.43 2312.87 0.42 14.78 5% grain 0.79 32.46 2257.87 0.59 15.15 10% grain 0.81 32.16 2315.88 0.56 9.70 (2)Test on formaldehyde release of self-adsorption fiber board In accordance with the regulation of GB /T18580-2001 Indoor Decorating and Refurbishing Materials-Limit of Formaldehyde Emission of Wood-based Panels and Finishing Products, the drier method is adopted to test the formaldehyde emission of self-adsorption fiber board . 0 0.2 0.4 0.6 0.8 1 Amount of addition % F o r m a l d e h y d e e
Discussion Physical and mechanical performance The composition element of self-adsorption fiber board is added with activated carbon, especially the activated carbon grain, which plays a role in reinforcing composite material, therefore, theoretically, the mechanical performance of the panel will be improved.
Forest Products Journal, 1999, 49(1):49-55 [4] Jack D Thrasher, Kaye H Kilburn.
Jiangsu Environmental Science and Technology (supplement 2): 43-45
Online since: September 2012
Authors: Keng Soon Woon, Shigeyuki Kanno, Kui Liu
Introduction
Gundrilling is a specialized material removal process for the construction of deep holes with typical depth to diameter ratios of greater than 10.
Primarily, this type of nickel-chromium-based superalloy is highly prone to work hardening [5] in which machining of the outer layer of material increases the hardness of the subsequent layer through sub-surface plastic deformation.
With the increased in hardness, higher magnitude of cutting force (energy) is required to machine the same amount of materials.
Teo: Journal of Materials Processing Technology Vol. 63 (1997), 199-204
Mannan: Machining Science and Technology Vol. 4-1 (2000), 127-168.
Primarily, this type of nickel-chromium-based superalloy is highly prone to work hardening [5] in which machining of the outer layer of material increases the hardness of the subsequent layer through sub-surface plastic deformation.
With the increased in hardness, higher magnitude of cutting force (energy) is required to machine the same amount of materials.
Teo: Journal of Materials Processing Technology Vol. 63 (1997), 199-204
Mannan: Machining Science and Technology Vol. 4-1 (2000), 127-168.
Online since: November 2013
Authors: Jian Guo Zhang, Bao Qun Wang, Yong Duan
., Room 2-2601, A Building, No. 24, Culture East Road, Lixia Region, Ji¢nan, Shandong, China
2School of Civil Engineering, Shandong Jiaotong University, No. 5001, Crabapple Road, University Science Park, Changqing Region, Ji¢nan, Shandong, China
awbaoqun@163.com, bjgzhang0508@163.com
Keywords: tunnel entrance, forepoling bolt, pre-supporting, finite numerical simulation, complicated geological condition
Abstract.
Mechanical parameters of surrounding rock and supports materials are shown in Table 1.
Table 1 Mechanical parameters of the materials Types of materials Elastic modulus (Gpa) Poisson ratio Cohesion (Mpa) Internal friction angle (°) Density (kg.m-3) Surrounding rock 0.30 0.40 0.15 19 1900 Primary supports 28.5 0.23 - - 2500 Reinforced area of systematic bolts 0.33 0.40 0.15 19 1900 Forepoling bolts 210 0.30 - - 7700 Analysis of Internal Force and Safety Factor of Primary Support Five control points in section have been chosen for analysis, and position of control points is shown in Figure 2.
Chinese Journal of Rock Mechanics and Engineering.
Mechanical parameters of surrounding rock and supports materials are shown in Table 1.
Table 1 Mechanical parameters of the materials Types of materials Elastic modulus (Gpa) Poisson ratio Cohesion (Mpa) Internal friction angle (°) Density (kg.m-3) Surrounding rock 0.30 0.40 0.15 19 1900 Primary supports 28.5 0.23 - - 2500 Reinforced area of systematic bolts 0.33 0.40 0.15 19 1900 Forepoling bolts 210 0.30 - - 7700 Analysis of Internal Force and Safety Factor of Primary Support Five control points in section have been chosen for analysis, and position of control points is shown in Figure 2.
Chinese Journal of Rock Mechanics and Engineering.
Online since: October 2011
Authors: Li Ming Wu, Zi Jian Wang
Figure 1 The building of reservoir slope section plane
Figure 2 The Area of slope sliding led to building superstructure foundation settlement after cracking
Table 1 Member size and strength of material
Member
Cross-section /mm
Strength of material
Upright post
450×450
C25
Beam
250×350
C25
Foundation beam
300×400
C25
Pile
800×800
C25
Wall
240
Mu10
Floor
100
C25
Table 2 The related parameters of soil
Soil number
Proportionality constant
Internal friction
Average bulk density
Lateral pressure coefficient
Negative friction coefficient
The friction strength
1
2000
10
16.5
2000×H
0.3
-4.80e3
2
4000
22
18.0
4000×H
0.3
-16.14e3
3
3000
30
20.0
5000×H
0.3
-33.78e3
Figure 3 The structure layout Figure 4 Distribution of soil profile
Figure 5 8 single piles settlement Figure 6 Roof beam and column
position location number intersected 12 nodes location number
Material Character.
Table 5 Comparison of internal force and displacement of load step table Number Result 0 1 2 3 4 5 6 7 8 Model node y maximum displacement (m) 0.05 0.05 0.05 0.05 0.05 0.05 0.05 0.05 0.05 Floor node y maximum displacement (m) 0.0043 0.0305 0.0221 0.0272 0.0347 0.0238 0.0174 0.0220 0.0280 Wall node y maximum displacement (m) 0.0020 0.0305 0.0221 0.0272 0.0347 0.0238 0.0174 0.0220 0.0280 Maximum frame bending moment E6 0.0808 1.230 2.230 2.920 1.520 2.180 2.070 2.720 2.810 Maximum value of frame-shear E6 0.1971 3.530 5.410 6.780 4.350 5.100 4.850 6.360 6.590 Axial force maximum frame E7 0.112 15.20 15.20 19.10 3.790 14.20 14.20 18.60 3.720 Lower Figure 7 and Figure 8 from the previous comparison results can be seen, in the same material, size, and the same gravity loads under those conditions, after the settlement of the upper 12 nodes of displacements and stresses are greater than when not settlement.
Design of superstructure Foundation and when considered separately, in order to meet seismic bearing capacity of structure shall increase the strength of materials.
Journal of Chongqing Jiaotong University Natural Science,Vol. 540-543 (2008), p. 27(4).
Table 5 Comparison of internal force and displacement of load step table Number Result 0 1 2 3 4 5 6 7 8 Model node y maximum displacement (m) 0.05 0.05 0.05 0.05 0.05 0.05 0.05 0.05 0.05 Floor node y maximum displacement (m) 0.0043 0.0305 0.0221 0.0272 0.0347 0.0238 0.0174 0.0220 0.0280 Wall node y maximum displacement (m) 0.0020 0.0305 0.0221 0.0272 0.0347 0.0238 0.0174 0.0220 0.0280 Maximum frame bending moment E6 0.0808 1.230 2.230 2.920 1.520 2.180 2.070 2.720 2.810 Maximum value of frame-shear E6 0.1971 3.530 5.410 6.780 4.350 5.100 4.850 6.360 6.590 Axial force maximum frame E7 0.112 15.20 15.20 19.10 3.790 14.20 14.20 18.60 3.720 Lower Figure 7 and Figure 8 from the previous comparison results can be seen, in the same material, size, and the same gravity loads under those conditions, after the settlement of the upper 12 nodes of displacements and stresses are greater than when not settlement.
Design of superstructure Foundation and when considered separately, in order to meet seismic bearing capacity of structure shall increase the strength of materials.
Journal of Chongqing Jiaotong University Natural Science,Vol. 540-543 (2008), p. 27(4).
Online since: August 2014
Authors: Francesco Micelli, Maria Antonietta Aiello, Emilia Vasanelli, Maria Sileo, Giovanni Leucci, Angela Calia
Material and Methods
Materials.
Despite the large scatter (R2=0.5), there is a linear positive trend with the UPV, which is in agreement with the theoretical assumption that ultrasonic pulse velocity is directly dependent on the density of the material, where longitudinal waves are measured.
Erdogan, Correlating sound velocity with the density, compressive strength and Young’s modulus of carbonate rocks, International Journal of Rock Mechanics & Mining Sciences. 41(2004) 871–875
Spanu, Some mechanisms of microstructure weakening in high-porous calcareous stones, Materials and Structures (2006), 39, 525–531.
Despite the large scatter (R2=0.5), there is a linear positive trend with the UPV, which is in agreement with the theoretical assumption that ultrasonic pulse velocity is directly dependent on the density of the material, where longitudinal waves are measured.
Erdogan, Correlating sound velocity with the density, compressive strength and Young’s modulus of carbonate rocks, International Journal of Rock Mechanics & Mining Sciences. 41(2004) 871–875
Spanu, Some mechanisms of microstructure weakening in high-porous calcareous stones, Materials and Structures (2006), 39, 525–531.
Online since: January 2014
Authors: Yun Han Li, Chun Fu Shao, Han Deng, Chang Qing Zheng
Fig.1 3D traffic environment construction procedure
Materials.
In 3Dmax, UC-win/Road can read the maps successfully only when them being appended by the material editor, set the mapping mode by UVW map.
Built-in model editor can edit size, materials and properties of the building.
The contours of warning signs, prohibition sign and some mandatory signs like round or triangular, so that a fit black map must be attached to reproduction pattern, check in the process of adding "through the black part of the material" option, then it can show its special contour in the 3D road network.
References [1] Qing Zhu, Hui Lin: Study on the virtual 3D city model city in environment of digital city geographic information system (Wuhan University Publications, China 2004) [2] Yonggang Zhang, Jianmin Xu, Jian Xiong: Journal of Chinese People’s Public Security University (Science and Technology) Vol. 65 (2010), p.73.
In 3Dmax, UC-win/Road can read the maps successfully only when them being appended by the material editor, set the mapping mode by UVW map.
Built-in model editor can edit size, materials and properties of the building.
The contours of warning signs, prohibition sign and some mandatory signs like round or triangular, so that a fit black map must be attached to reproduction pattern, check in the process of adding "through the black part of the material" option, then it can show its special contour in the 3D road network.
References [1] Qing Zhu, Hui Lin: Study on the virtual 3D city model city in environment of digital city geographic information system (Wuhan University Publications, China 2004) [2] Yonggang Zhang, Jianmin Xu, Jian Xiong: Journal of Chinese People’s Public Security University (Science and Technology) Vol. 65 (2010), p.73.
Online since: August 2013
Authors: Li Gang Wang, Fei Long Zhao, Wu Jun Chen, Yu Feng Chen
Its configuration and dimensions are given in Fig. 1and 2, and the material properties are listed in Table 1.
Its configuration and dimensions are given in Fig. 1, and the material properties are listed in Table 1.
Its configuration and dimensions are given in Fig. 7, and the material properties are listed in Table 1.
Acknowledgements The authors are grateful to the financial support by the national Natural Science Foundation of China(No. 51278299) References [1] Wielgosz C, Thomas J C.
[4] H.F.Tan, Y.L.Li, L.N.Mao,X.W.Du,Free Vibration Characteristics of Inflatable supporting tube, Journal of Harbin Institute of Technology.45(5)(2008)709-713 [5] Gao Haijian.
Its configuration and dimensions are given in Fig. 1, and the material properties are listed in Table 1.
Its configuration and dimensions are given in Fig. 7, and the material properties are listed in Table 1.
Acknowledgements The authors are grateful to the financial support by the national Natural Science Foundation of China(No. 51278299) References [1] Wielgosz C, Thomas J C.
[4] H.F.Tan, Y.L.Li, L.N.Mao,X.W.Du,Free Vibration Characteristics of Inflatable supporting tube, Journal of Harbin Institute of Technology.45(5)(2008)709-713 [5] Gao Haijian.
Online since: September 2016
Authors: Norimitsu Kishi, Yusuke Kurihashi, Maki Mizuta, Akinori Shimata
Material properties of concrete
Specimen
Compressive
strength (MPa)
Static elastic
Modulus (GPa)
Non-damaged
30.7
20.5
Damaged
25.7
10.3
Photo 1.
Material properties.
[2] Choi W. and Yun, H.: Acoustic emission activity of CFRP-strengthened reinforced concrete beams after freeze–thaw cycling, Cold Regions Science and Technology 110 (2015) 47-58
[3] Hasan, M., Okuyama, H., Sato, Y, and Ueda, T.: Stress-strain model of concrete damaged by freezing and thawing cycles, Journal of Advanced Concrete Technology, Vol.2, No.1 (2003) 89-99
(in Japanese) [5] Berto, L., Saetta, A., and Talledo, D.: Constitutive model of concrete damaged by freeze–thaw action for evaluation of structural performance of RC elements, Construction and Building Materials 98 (2015) 559-569
Material properties.
[2] Choi W. and Yun, H.: Acoustic emission activity of CFRP-strengthened reinforced concrete beams after freeze–thaw cycling, Cold Regions Science and Technology 110 (2015) 47-58
[3] Hasan, M., Okuyama, H., Sato, Y, and Ueda, T.: Stress-strain model of concrete damaged by freezing and thawing cycles, Journal of Advanced Concrete Technology, Vol.2, No.1 (2003) 89-99
(in Japanese) [5] Berto, L., Saetta, A., and Talledo, D.: Constitutive model of concrete damaged by freeze–thaw action for evaluation of structural performance of RC elements, Construction and Building Materials 98 (2015) 559-569
Online since: January 2015
Authors: Denis Sivin, Alexander Ryabchikov, Vladimir Golovkov, Valentina Sokhoreva
In the base kitting-up, the installation is equipped with six vacuum-arc evaporators (VAE) with the devices for metal plasma macroparticles filtering (MPF), high frequency dual magnetron, gaseous plasma generator with a heated cathode, source of ion beams and plasma of conductive materials based on vacuum-arc discharge (VAD), high voltage pulsed generator for the realization of regime of high-frequency short-pulse plasma-immersion ion implantation and/or coating deposition [6-8].
New generation installation of ion-beam and plasma material treatment: а) scheme; b) external view.
Acknowledgement The work was supported by Ministry of Education and Science of the Russian Federation.
Russian Physics Journal. 10/3 (2007) 275-280 (in Russian)
Nasyrov, Sources and methods of repetitively pulsed ion/plasma material treatment.
New generation installation of ion-beam and plasma material treatment: а) scheme; b) external view.
Acknowledgement The work was supported by Ministry of Education and Science of the Russian Federation.
Russian Physics Journal. 10/3 (2007) 275-280 (in Russian)
Nasyrov, Sources and methods of repetitively pulsed ion/plasma material treatment.