Li H.-N.,Dalian University of Technology |
Ji X.-H.,Dalian University of Technology |
Ji X.-H.,China Triumph International Engineering Co. |
Ren L.,Dalian University of Technology |
And 2 more authors.
Dalian Ligong Daxue Xuebao/Journal of Dalian University of Technology | Year: 2011
A small dimensional sensor with two holders in both sides of fiber Bragg grating (FBG), which is protected and packaged by a stainless steel tube, is used for strain measurement. Experiments were conducted on the universal material testing machine to calibrate the strain transferring characteristics in different parent materials. The strain measured by FBG sensor agrees well with the theoretical result. The tube-packaged strain FBG sensors are applied to the vibration experiments of artificial concrete dam models. The results show that this FBG strain sensor, which has the advantages of high sensitivity, low noise and long-term measure stability, can effectively monitor the changing trends of elastic strain and crack initiation strain of artificial concrete dam model in the vibration experiments. It is testified to be a promising potential instrument in long-term vibration-based structural health monitoring. Source
Wang J.-X.,Anhui University of Science and Technology |
Peng X.-B.,China Triumph International Engineering Co.
Zhuzao/Foundry | Year: 2012
To study the effects of macroscopic pores on the damping behavior of Cu, porous Cu specimens were prepared using pressure infiltration process. Its damping behavior was investigated using multifunction internal friction apparatus. It was found that the damping capacity of porous Cu is higher than that of its bulk metal, increases with the increment of porosity and the decrement of pore size, and typically depends on strain amplitudes. TEM observations show that a lot of dislocations exist in porous Cu. The experimental result shows that macroscopic pores and dislocations are the main contributors to damping mechanism of porous Cu. Source
Zhang J.,Lanzhou University |
Zhang Y.,Lanzhou University |
Feng L.,Gansu Architecture Design and Consultation Co. |
Dong Q.,Lanzhou University |
And 2 more authors.
Jianzhu Cailiao Xuebao/Journal of Building Materials | Year: 2014
Based on the thickness of surface corrosion layer and the loss rate of compressive strength in corrosion region and according to the model of strength damage of corroded concrete, the test of three groups of concrete samples immersed in sodium sulfate solution for long time was carried out. The experimental results were fitted, and parameters were analyzed. It is revealed that the calculation results and test results are in good agreement. The results show that the concrete under sulfate environment may be divided into three regions: expansion dense region, crack development region and uncorroded region. The comprehensive corrosion coefficient may reflect relationship between concrete mix ratio and corrosion resistance, the higher the corrosion coefficient, the worse the corrosion resistance. According to the model of strength damage of corroded concrete and the computation method of corrosion resistance coefficient for compressive strength, concrete corrosion resistance under sulfate environment may be evaluated and forecasted. Source
Shou P.,China Triumph International Engineering Co.
Glass Physics and Chemistry | Year: 2015
This paper briefly introduces the development status of world flat glass industry, especially the breakthroughs achieved in terms of new technologies, new products and energy conservation and environment protection in Chinese flat glass industry after entering the 21st century. Based on the analytical investigation on several aspects of capacity distribution, technical innovation, market trends, product structure, the energy conservation and environment protection, this paper is focused on the future development direction of world flat glass industry under the background of economic globalization and market integration. © 2015, Pleiades Publishing, Ltd. Source
Ding W.,Dalian Jiaotong University |
Ding W.,Dalian University of Technology |
Li L.,Dalian Jiaotong University |
Zhang L.,Dalian Jiaotong University |
And 3 more authors.
Journal of Chemical Physics | Year: 2013
The super-thin silicon oxynitride (SiOxNy) films were deposited onto the N doped polyethylene terephthalate (PET) surface. Varying the N doping parameters, the different chemical bond structures were obtained at the interface between the SiOxNy film and the PET surface. X-ray photoelectron spectra results showed that at the initial stage of SiOxNy film growth, the CN bonds could be broken and C-N-Si crosslink bonds could be formed at the interface of SiOxN yPET, which CN bonds could be formed onto the PET surface during the N doping process. At these positions, the SiOxNy film could be crosslinked well onto the PET surface. Meanwhile, the doped N could crosslink the SiO4 and SiN4 tetrahedrons, which could easily form the dense layer structure at the initial stage of SiO xNy film growth, instead of the ring andor chain structures of SiO4 tetrahedrons crosslinked by O. Finally, from the point of applying SiOxNyPET complex as the substrate, the present work reveals a simple way to crosslink them, as well as the crosslink model and physicochemical mechanism happened at the interface of complex. © 2013 American Institute of Physics. Source