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Containment of high-speed rotating disk fragments 被引量:9
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作者 Hai-jun XUAN Lu-lu LIU +2 位作者 Yi-ming FENG Qing HE Juan-juan LI 《Journal of Zhejiang University-Science A(Applied Physics & Engineering)》 SCIE EI CAS CSCD 2012年第9期665-673,共9页
Disk burst accidents sometimes happen in aeroengines.To avoid tragic consequences,aeroengine casings must have sufficient containment capability.Experiments and simulations need to be conducted to study the impact,dis... Disk burst accidents sometimes happen in aeroengines.To avoid tragic consequences,aeroengine casings must have sufficient containment capability.Experiments and simulations need to be conducted to study the impact,distortion,and perforation caused by disk burst and which may give important clues to potential failure mechanisms.This paper presents some containment tests of high-speed rotating disk fragments,in which the original disks were burst into three equal fragments within a predetermined rotating speed range.The failure modes of the containment casing varied significantly with the thickness of the containment casing.Shearing,tearing,tensile fracture,and large plastic stretching deformation occurred in a thin-walled containment casing,while a thick-walled casing could contain disk fragments and withstand large plastic deformation.Numerical simulations were carried out to study the impact process and failure modes further.Good agreement was found between the results of the simulations and the tests. 展开更多
关键词 AEROENGINE Disk fragments Engine casing containment capability Numerical simulation
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Penetration of disk fragments following impact on thin plate 被引量:6
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作者 Juan-juan LI Hai-jun XUAN +2 位作者 Lian-fang LIAO Wei-rong HONG Rong-ren WU 《Journal of Zhejiang University-Science A(Applied Physics & Engineering)》 SCIE EI CAS CSCD 2009年第5期677-684,共8页
To investigate the ballistic resistance and failure pattern of aeroengine casing following the impact of disk fragments, and to determine the optimum case structure, the phenomena of a 1/3rd disk fragment impact on si... To investigate the ballistic resistance and failure pattern of aeroengine casing following the impact of disk fragments, and to determine the optimum case structure, the phenomena of a 1/3rd disk fragment impact on single and double-layered thin plate targets were simulated using nonlinear dynamical analysis software MSC.Dytran. Strain rate effect was introduced in a Johnson-Cook (JC) material model for the disk fragment and the plate. Impact modeling was based on the Arbitrary Lagrange-Eulerian method, and simulated using explicit finite element method (FEM). Simulation results showed that the major failure pattern of the plate is shearing and tensile fracture with large plastic deformation. It was also concluded that the ballistic limit velocity increases with the standoff distance when it is beyond a certain value, and that greater resistance is obtained when the front plate has either a proportionately low or high thickness. The impact resistance of a double-layered plate may exceed that of a single plate if the thicknesses and standoff distance of the two plates are set appropriately. 展开更多
关键词 AEROENGINE Disk burst failure Case containment capability Ballistic limit velocity
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Narrow distribution of cyanophage psbA genes observed in two paddy waters of Northeast China by an incubation experiment 被引量:3
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作者 Xinzhen Wang Ruiyong Jing +5 位作者 Junjie Liu Zhenhua Yu Jian Jin Xiaobing Liu Xiaojuan Wang Guanghua Wang 《Virologica Sinica》 SCIE CAS CSCD 2016年第2期188-191,共4页
Dear Editor,Cyanophages are viruses that infect cyanobacteria.They play an important role in shaping the genetic and functional diversity of themselves and their hosts through genetic exchange and shuffling(Lindell e... Dear Editor,Cyanophages are viruses that infect cyanobacteria.They play an important role in shaping the genetic and functional diversity of themselves and their hosts through genetic exchange and shuffling(Lindell et al.,2005;Singh et al.,2012). 展开更多
关键词 incubation paddy waters capable Northeast cyanobacteria phage shaping contained themselves
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