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| 1 | Application of Hydrothermal Diamond Anvil Cell to Homogenization Experiments of Silicate Melt Inclusions显示文摘The homogenization of silicate melt inclusions(SMIs), small droplets of silicate melt trapped in magmatic minerals, is an important component of petrogenetic and magmatic research. Conventional homogenization experiments on SMIs use microscope-mounted heating stages capable of producing high temperatures at 1 atm and cold-seal high-pressure vessels. Heating stages are generally used for SMIs with low internal pressures and allow in situ observations of the homogenization processes. In contrast, cold-seal high-pressure vessels are generally used to heat SMIs that have high internal pressures, although the homogenized SMIs can only be observed after quenching in this approach. Here we outline an alternative approach that uses a hydrothermal diamond anvil cell(HDAC) apparatus to homogenize SMIs. This is the only current method wherein phase changes in high-internal-pressure SMIs can be observed in situ during homogenization experiments, which represents an advantage over other conventional methods. Using an HDAC apparatus prevents high-internal-pressure SMIs from decrepitating during heating by elevating their external pressure, in addition to allowing in situ observations of SMIs. The type-V HDAC that is currently being used has a shorter distance between the sample chamber and the observation window than earlier types, potentially enabling continuous observation of the processes involved in heating and SMI homogenization through an objective lens with a long working distance. Homogenization experiments using HDAC require that a number of steps, including HDAC preparation, sample preparation, sample loading, preheating, and formal heating, be carefully followed. Homogenization experiments on SMIs within granite samples from the Jiajika pegmatite deposit(Sichuan, China) are best performed using an HDAC-based approach, because the elevated proper external pressure of these SMIs, combined with a short heating duration, helps to suppress material leakage and any reactions within the SMIs, in addition to allowing in situ observations during homogenization experiments. Furthermore, using the HDAC approach has other benefits: heating rates can be precisely controlled, wafer oxidization can be prevented, and samples can be subjected to in situ microbeam analysis. In summary, homogenization using HDAC provides more reliable results than those obtained using conventional heating equipment. Future developments will include improvements to the quenching method and temperature controls for the HDAC apparatus, thereby improving the utility of this approach for SMI homogenization experiments. | LI Jiankang LI Shenghu | 2014 | Acta Geologica Sinica(English Edition)2014，88，3： | 10 |
| 2 | Two Kinds of Contact Problems in Dodecagonal Quasicrystals of Point Group 12 mm显示文摘In this paper,two kinds of contact problems in 2-D dodecagonal quasicrystals were discussed using the complex variable function method:one is the finite frictional contact problem,the other is the adhesive contact problem.The analytic expressions of contact stresses in the phonon and phason fields were obtained for a flat rigid punch,which showed that:(1) for the finite frictional contact problem,the contact stress exhibited power-type singularities at the edge of the contact zone;(2) for the adhesive contact problem,the contact stress exhibited oscillatory singularities at the edge of the contact zone.The distribution regulation of contact stress under punch was illustrated;and the low friction property of quasicrystals was verified graphically. | Xuefen Zhao Xing Li Shenghu Ding | 2016 | Acta Mechanica Solida Sinica2016，29，2： | 7 |
| 3 | Two kinds of contact problems in three-dimensional icosahedral quasicrystals显示文摘Two kinds of contact problems, i.e., the frictional contact problem and the adhesive contact problem, in three-dimensional(3D) icosahedral quasicrystals are discussed by a complex variable function method. For the frictional contact problem, the contact stress exhibits power singularities at the edge of the contact zone. For the adhesive contact problem, the contact stress exhibits oscillatory singularities at the edge of the contact zone. The numerical examples show that for the two kinds of contact problems,the contact stress exhibits singularities, and reaches the maximum value at the edge of the contact zone. The phonon-phason coupling constant has a significant effect on the contact stress intensity, while has little impact on the contact stress distribution regulation. The results are consistent with those of the classical elastic materials when the phonon-phason coupling constant is 0. For the adhesive contact problem, the indentation force has positive correlation with the contact displacement, but the phonon-phason coupling constant impact is barely perceptible. The validity of the conclusions is verified. | Xuefen ZHAO Xing LI Shenghu DING | 2015 | Applied Mathematics and Mechanics(English Edition)2015，36，12： | 7 |
| 4 | Heat Conduction in Multilayered Thermoelectric Materials with Multiple Cracks显示文摘 | Shenghu Ding Yueting Zhou | 2018 | Acta Mechanica Solida Sinica2018，31，4： | 5 |
| 5 | THE PERIODIC CRACK PROBLEM IN BONDED PIEZOELECTRIC MATERIALS显示文摘在同类的压电的脱衣的平行裂缝的一个周期的数组的问题结合了到机能上地分级的压电的材料为不同类的连续统被调查。材料不同类沿着裂缝的方向作为在指数的功能形式的 shear 模量的空间变化被代表,这被假定。混合边界价值问题被使用 Fourier 变换归结为一个单个不可分的方程,并且单个不可分的方程被使用 Gauss-Chebyshev 集成技术数字地解决。数字结果被获得为材料不同类的不同的值作为裂缝频率的一个函数说明压力紧张因素的变化。 | Ding Shenghu Li Xing | 2007 | Acta Mechanica Solida Sinica2007，20，2： | 4 |
| 6 | Microstructure and Mechanical Properties of Electron Beam Welded Alloy J75显示文摘Microstructure and mechanical properties of electron beam welded alloy J75 were studied under as-welded and post-weld aging treatment(PWAT)conditions.The results showed that high-quality welds were produced by electron beam welding.Under as-welded condition,a fine dendritic structure consisting of gamma dendrite matrix and Laves phase was observed in the welds.Better mechanical properties were obtained in the weld zone than that of base metal because of the fine size of the dendritic structure.After PWAT,a discontinuous distribution ofγ'particles existed in the dendritic structure.The presence of aγ'depletion zone in the dendrite core resulted in a significant degradation of mechanical properties of the weld. | Shenghu Chen Mingjiu Zhao Hao Liang Lijian Rong | 2014 | Journal of Materials Science & Technology2014，30，5： | 4 |
| 7 | Numerical investigation on flow nonuniformity-induced hysteresis in scramjet isolator显示文摘Numerical simulation and theoretical analysis were conducted to study the hysteresis inside scramjet isolator during the reciprocating process of back pressure variation.It is revealed that only a regular reflection is theoretically possible for two leading shocks when the inflow Mach number is greater than 2.0,and no hysteresis can occur in the transition between shock reflection types.Nevertheless,wall suction,gas injection,and background waves cause non-uniformity of the incoming flow and would make hysteresis possible.Besides the classical hysteresis in the transition between shock reflection,new kinds of hysteresis were found in both the deflection angle of separated boundary layer and the location of the shock train.Moreover,the occurrence of hysteresis in the deflection angle of the separated boundary layer is accompanied with the shock reflection hysteresis.In the case with background waves or gas injection,hysteresis in the starting position of leading shock was observed too.As back pressure decreases,the leading shock does not follow the same path as that as the back pressure increases,and it is anchored at the location where the background shock or the injection interacts with the leading shock.It is inferred that,if two strong adverse pressure gradient regions move towards and interact with each other,hysteresis will take place when they start to separate. | Tinglong HUANG Lianjie YUE Shenghu MA Qifan ZHANG Peng ZHANG Xinyu CHANG | 2020 | Chinese Journal of Aeronautics2020，33，12： | 3 |
| 8 | Role ofδ-ferrite in fatigue crack growth of AISI 316 austenitic stainless steel显示文摘FF sample(nearly free ofδ-ferrite)and CF sample(containing∼4%δ-ferrite)were prepared from the AISI 316 austenitic stainless steel plate to elucidate the role ofδ-ferrite in the fatigue crack growth under the solution treated and accelerated aged conditions.It is found that the fatigue crack growth resistance of the CF sample is higher than the FF sample under the solution treated condition.However,a significant deterioration of the fatigue crack growth resistance is observed in the CF sample while little variation is found in the FF sample after accelerated aging treatment at 750°C for 10 h.In the solution treated condition,deflected crack growth path is present when the main crack encounters theδ-ferrite in the CF sample due to the differences in the fatigue responses between austenite andδ-ferrite.The measured growth rate of the deflected crack is significantly slower than that of the flat crack of the same length.After the accelerated aging treatment,microcracks are produced at the M_(23)C_(6)/δinterface due to the strain incompatibility between M_(23)C_(6) and retainedδ-ferrite when the decomposedδ-ferrite is subject to plastic deformation in the crack tip plastic zone.The preexisting microcracks in the front of crack tip provide a viable path for crack propagation,resulting in the relatively flat crack path. | Qiyu Wang Shenghu Chen Xinliang Lv Haichang Jiang Lijian Rong | 2022 | Journal of Materials Science & Technology2022，，19： | 3 |
| 9 | Improvement to observability measures of LFO modes in power systems with DFIGs显示文摘Observation of the low-frequency oscillation (LFO) modes in power systems is important to design the damping scheme. The state equations of the power system with the doubly-fed induction generators (DFIGs) are derived to find the LFO modes related to the synchronous generator (SGs) and the DFIGs. The definition of the observability measure is improved to consider the initial output and the attenuation speed of the modes. The sensitivities of the observability measures to the control parameters are derived. The numerical results from the small and large-disturbance validate the LFO modes caused by the DFIGs, and different observability measures are compared. Adjustment of the control parameters is chosen based on the sensitivity model to improve the observability and damping ratio of the LFO mode, and the stability of the wind power system. | Shenghu LI | 2021 | Frontiers in Energy2021，15，2： | 2 |
| 10 | Interface Behavior of Copper and Steel by Plasma-MIG Hybrid Arc Welding显示文摘Plasma-MIG hybrid arc welding is a hybrid heating source welding method which is composed of plasma arc and MIG arc. During Plasma-MIG hybrid arc welding process, the interface behavior of copper and steel dissimilar alloy is investigated. The results show that electromagnetic stirring effect decreases and the heat input increases with the increase of outer plasma current in the hybrid arc welding process. The interface diffusion and interface thickness is controlled by the tradeoff of electromagnetic stirring effect degradation and heat input increase. The interface diffusion and interface thickness are controlled by decreasing the electromagnetic stirring force and increasing the heat input with the increase of plasma current in Cu/Fe plasma-MIG hybrid arc welding process. | Tao YANG Hongming GAO Shenghu ZHANG Lin WU | 2013 | Acta Metallurgica Sinica(English Letters)2013，26，3： | 2 |
| 11 | Reliability and sensitivity analysis of loop-designed security and stability control system in interconnected power systems显示文摘Security and stability control system(SSCS)in power systems involves collecting information and sending the decision from/to control stations at different layers;the tree structure of the SSCS requires more levels.Failure of a station or channel can cause all the execution stations(EXs)to be out of control.The randomness of the controllable capacity of the EXs increases the difficulty of the reliability evaluation of the SSCS.In this study,the loop designed SSCS and reliability analysis are examined for the interconnected systems.The uncertainty analysis of the controllable capacity based on the evidence theory for the SSCS is proposed.The bidirectional and loop channels are introduced to reduce the layers and stations of the existing SSCS with tree configuration.The reliability evaluation and sensitivity analysis are proposed to quantify the controllability and vulnerable components for the SSCS in different configurations.By aiming at the randomness of the controllable capacity of the EXs,the uncertainty analysis of the controllable capacity of the SSCS based on the evidence theory is proposed to quantify the probability of the SSCS for balancing the active power deficiency of the grid. | Shenghu Li Huimin Zhou Yunsong Yan Wei Han Jianfeng Ren | 2022 | Global Energy Interconnection2022，5，5： | 2 |
| 12 | Research on the Damage of Porosityand Permeabilitydue to Perforation on Sandstone in the Compaction Zone显示文摘A perforating hole is a channel through which the oil and gas in a reservoir pass into the production well bore.During the process of perforating due to explosion,the surrounding sandstone will be damaged to a certain extent,which will increase the well bore skin and lead to the decrease of production consequently.In this work a mechanical model of perforating damage is developed to describe the influences of perforating due to explosion on the porosity and permeability of the surrounding sandstone near the compaction zone.Based on this developed model,the important data related to the damage of sandstone,such as matrix effective stress,plastic deformation,volumetric strain,and so on,can be numerically simulated.Especially the behaviors of plasticity kinematic hardening at high strain rate due to impact loads,which are the important characteristics in the sandstone,is taken into account in this developed model.Both numerical and testing results show that the damage due to perforation in the sandstone can be accurately predicted by the developed model together with the porosity and permeability evolving model of perforation in a compaction zone.As a practical application,a methodology for the analysis of damage of porosity and permeability around a perforation tunnel is supposed based on the developed model and the core flow efficiency test of interparticle pore spaced sandstone target in China Shengli Oilfield and the computed tomography test. | Shifeng Xue Xiuxing Zhu Lin Zhang Shenghu Zhu Guigen Ye Xuejun Fan | 2016 | Computers, Materials & Continua2016，，1： | 2 |
| 13 | Preparation of superabsorbent based on the graft copolymerization of acrylic acid and acrylamide onto konjac glucomannan and its application in the water retention in soils显示文摘 | Da‐TingTian Shi‐RongLi Xin‐PingLiu Jing‐ShouWang ShengHu Cheng‐MeiLiu Hong‐QuanXie | 2012 | J Appl Polym Sci2012，，4： | 2 |
| 14 | Hydrogen-induced Modification in the Deformation and Fracture of a Precipitation-hardened Fe-Ni Based Austenitic Alloy显示文摘Hydrogen-induced modification in the deformation and fracture of a precipitation-hardened Fe e Ni based austenitic alloy has been investigated in the present study by means of thermal hydrogen charging experiment, tensile tests, scanning electron microscopy(SEM) and transmission electron microscopy(TEM). It is found that the g0 particles are subjected to the multiple shearing by dislocations during plastic deformation,which promotes the occurrence of the dislocation planar slip. Moreover, the alloy will be enhanced by hydrogen resulting in the formation of strain localization at macroscale. So, the mechanisms of deformation and fracture in the alloy have been proposed in terms of serious hydrogen-induced planar slip at microscale which can lead to macroscopic strain localization. | Mingjiu Zhao Zifeng Guo Shenghu Chen Hao Liang Lijian Rong | 2014 | Journal of Materials Science & Technology2014，30，11： | 1 |
| 15 | Design of an RFQ for direct plasma injection scheme显示文摘A high current radio frequency quadrupole (RFQ) is being studied at the Institute of Modern Physics, Chinese Academy of Sciences (IMP, CAS) for the direct plasma injection scheme (DPIS). Because of the strong space charge of beams from laser ion source, the beam dynamics design of the RFQ has been carried out with a new code, which can deal with space charge effectively. The design of the RFQ structure is performed with an electromagnetic simulation code and the determination of parameters of the structure has been done to maximize the shunt impedance when the frequency is kept fixed. The influences of dipole mode effect and flatness on beams were also discussed. | ZHANG Zhouli R.A. Jameson ZHAO Hongwei XU Zhe LIU Yong ZHANG Shenghu ZHANG Cong SUN Liepeng MEI Lirong SHEN Xiaokang | 2009 | Nuclear Science and Techniques2009，20，5： | 1 |
| 16 | Synergetic toughness and morphology of poly(propylene)/nylon 11/maleated ethylene‐propylene diene copolymer blends显示文摘 | Biao‐BingWang Li‐XiaWei Guo‐ShengHu | 2008 | J Appl Polym Sci2008，，3： | 1 |
| 17 | Transmission loadability with field current control under voltage depression显示文摘 | Li Shenghu Ding Ming Du Shaowu | 2009 | IEEE Transactions on Power Delivery2009，24，4： | 1 |
| 18 | Tensile Properties of CFRP and Hybrid FRP Composites at Elevated Temperatures 显示文摘 | Shenghu Cao Zhishen Wu Xin Wang | 2009 | Journal of Composite Materials2009，43，4： | 1 |
| 19 | AuPt alloy nanoparticles for CO-tolerant hydrogen activation:Architectural effects in Au-Pt bimetallic nanocatalysts显示文摘 | Zhou Shenghu Gregory S Jackson | 2007 | Adv Funct Mater2007，17，16： | 1 |
| 20 | Delta-aminolevulinate dehydratase polymorphism and blood lead levels in Chinese children 显示文摘 | Shen XM Wu Shenghu Yan Chonghuai | 2001 | Environ Res2001，85，3： | 1 |
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