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RISS 인기검색어
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- 저자 : Jiewei Hong (검색결과 3 건)
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Analysis of shear stress wrinkling of asymmetric sheet specimen under offset loading
Haoxing Tang,Tong Wen,Jiewei Hong,Yin Zhou,Longzhu Zhang 대한기계학회 2022 JOURNAL OF MECHANICAL SCIENCE AND TECHNOLOGY Vol.36 No.3
The commonly used wrinkling evaluation methods such as cup forming and the Yoshida buckling test (YBT) only consider the symmetric sheet specimen and loading, therefore a deviation from the reality is inevitable. A method using the asymmetric specimen (AS) under offset loading is proposed and investigated with two materials SUS304 and DC04. Results show that the unbalanced external force in AS induces special stress state that is not included in YBT at wrinkling onset, where the shear stresses are dominant. The length and height evolution of the wrinkle is controlled by the principal stresses, and the direction gradually approaches the tensile axis during deformation. The shear stress decreases with the length/width ratio increases, but it rises at first and then falls when the clamping width increases. The error between the simulation and experiment is 2.9 %. This method can be used to examine the shear wrinkling properties of sheet metal.
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Component Prototyping for the China Spallation Neutron Source Project
Jie Wei,Yanwei Chen,Yunlong Chi,Changdong Deng,Haiyi Dong,Shinian Fu,Wei He,Kaixi Huang,Wen Kang,Jian Li,Huafu Ouyang,Huamin Qu,Caitu Shi,Hong Sun,Jingyu Tang,Juzhou Tao,Sheng Wang,Zhongxiong Xu,Xueju 한국물리학회 2009 THE JOURNAL OF THE KOREAN PHYSICAL SOCIETY Vol.54 No.5
The China Spallation Neutron Source (CSNS) complex consists of an H- linear accelerator, a rapid cycling synchrotron accelerating the beam to 1.6 GeV, a solid tungsten target station and instruments for spallation neutron applications. The facility operates at a 25-Hz repetition rate with an initial design beam power of 120 kW and is upgradeable to 500 kW. The primary challenge is to build a robust and reliable user-friendly facility with upgrade potential at a fraction of the \world standard" cost. Success of the project relies on the results of prototyping research & development (R&D) of key technical systems and components. This paper discusses the prototyping experiences of the past two and a half years. The China Spallation Neutron Source (CSNS) complex consists of an H- linear accelerator, a rapid cycling synchrotron accelerating the beam to 1.6 GeV, a solid tungsten target station and instruments for spallation neutron applications. The facility operates at a 25-Hz repetition rate with an initial design beam power of 120 kW and is upgradeable to 500 kW. The primary challenge is to build a robust and reliable user-friendly facility with upgrade potential at a fraction of the \world standard" cost. Success of the project relies on the results of prototyping research & development (R&D) of key technical systems and components. This paper discusses the prototyping experiences of the past two and a half years.
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Jie Wei,Yong-Zhan Zhen,Ju Cui,Fa-Lin He,Tao Shen,Gang Hu,Xiao-Hong Ren,Yajun Lin 대한약학회 2016 Archives of Pharmacal Research Vol.39 No.7
The objective of this study was to investigate the protective effects of rhein lysinate (RHL) on the liver. Mice were divided into four groups: C57BL/J control, the KK/HlJ diabetic model, and 25 and 50 mg/kg/day RHLtreated KK/HlJ groups. The KK/HlJ diabetic mouse model was made by injecting STZ and feeding mice diabetic food. At 16 weeks, mice were sacrificed and their livers were harvested. The results indicated that compared with the C57BL/J control group, the body weights, liver weights and liver weight-to-body weight ratio were increased in KK/HlJ diabetic mice; however, these values were decreased following treatment with RHL. Compared with the C57BL/J control, KK/HlJ diabetic mice had a significantly lower level of SOD and GSH-px in their livers, but had a significantly higher level of MDA. However, these effects were ameliorated by RHL. Hepatic adipose infiltration was observed in KK/HlJ mice, but not in C57BL/J mice. RHL decreased the incidence of hepatic adipose infiltration and significantly decreased the expression of TNF-a, IL-6, NF-jB, SREBP-1c, and Fas, as well as the phosphorylation of NF-jB in the liver. In conclusion, RHL can improve hepatic function by decreasing hepatic adipose infiltration and the expression of inflammatory factors.
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