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Predication of Plastic Flow Characteristics in Ferrite/Pearlite Steel Using a Fern Unit Cell Method

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上海交通大学学报 2004年第Z2期38卷 61-66页

作者： Hong li jingtao han jing liu Lv Zhang School of Material Sci. & Eng. Univ. Of Sci. &Tech. Beijing Beijing100083 China School of Material Sci. & Eng. Univ. Of Sci. &Tech. Beijing Beijing100083 China School of Material Sci. & Eng. Univ. Of Sci. &Tech. Beijing Beijing100083 China School of Material Sci. & Eng. Univ. Of Sci. &Tech. Beijing Beijing100083 China

The flow stress of ferrite/pearlite steel under uni-axial tension was simulated with finite element method (FEM) by applying commercial software MARC/MENTAT. Flow stress curves of ferrite/pearlite steels were calculated based on unit cell model. The effects of volume fraction, distribution and the aspect ratio of pearlite on tensile properties have been investigated.

关键词： ferrite/pearlite steel unit cell flow curve finite element method simulation

Net Voltage and Phenomenon of Resonance Induced by Chaotic Signal for a Superconducting Junctions Device

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Communications in Theoretical Physics 2006年第4X期46卷 647-650页

作者： li jing-Hui han Yin-Xia Department of Physics Ningbo University Ningbo 315211 China

The effects of a quenched chaotic signal on the over-damped motion of the electron pairs of a superconducting junctions device are studied. It is shown that the chaotic signal can induce the net voltage and the phenom... 详细信息

关键词： superconducting junction electron pairs noise

Mean First Passage Time for System with Fluctuating Potential Barrier and Coupled Noise

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Communications in Theoretical Physics 2007年第3期47卷 517-519页

作者： li jing-Hui han Yin-Xia Faculty of Science Ningbo University Ningbo 315211 China

In this paper we study the mean first passage time （MFPT） over a fluctuation potential barrier driven by a coupled noise. It is shown that the MFPT over the fluctuation potential barrier displays resonant activations as the function of the flipping rate of the fluctuation potential barrier, and as the function of the dichotomous noise transition rate.

关键词： mean fist passage time resonant activation coupled noise

Transport of Electron Pairs in a Superconducting Junction Device： Underdamped Case

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Communications in Theoretical Physics 2006年第6期45卷 1031-1034页

作者： li jing-Hui han Yin-Xia Faculty of Science Ningbo University Ningbo 315211 China

Transport of electron pairs in a superconducting junction device in the underdamped case is investigated. It is shown that the capacitance of the junctions can slow the movement of the electron pairs and reduce the net voltage. It is also shown that, for the underdamped case and the overdamped case, the movement of the electron pairs in this superconducting junctions device has some similar features. By controlling the correlation between the additive and multiplicative noise, the flux can be reversed. In addition, if the additive noise strength （or the temperature T） is large enough, a reversal can also be induced.

关键词： superconducting junction electron pairs noise

Giant-Resonance for a Four-Dimensionally Coupled System with Dichotomous Noise

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Communications in Theoretical Physics 2007年第4期47卷 672-674页

作者： li jing-Hui han Yin-Xia Faculty of Science Ningbo University Ningbo 315211 China

In this paper, we investigate a four-dimensionally coupled system driven by dichotomous noise. A new kind of stochastic resonance is found, for which the response of the system to the input signal can be hugely intens... 详细信息

关键词： super-conducting junction electron pairs spatial-temporal noise

Stochastic Resonance Induced by Dichotomous Resistor in an Electric Circuit

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Communications in Theoretical Physics 2007年第3期47卷 487-490页

作者： li jing-Hui han Yin-Xia Faculty of Science Ningbo University Ningbo 315211 China

Abstract An electric circuit with dichotomous resistor is investigated. It is shown that the amplitude of the average electric current washing the resistor represents the phenomenon of stochastic resonance, which is t... 详细信息

关键词： stochastic resona.nce dichotomous noise electric current

Resonance, Multi-resonance, and Reverse-resonance Induced by Multiplicative Dichotomous Noise

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Communications in Theoretical Physics 2007年第4X期48卷 605-609页

作者： li jing-Hui han Yin-Xia Faculty of Science Ningbo University Ningbo 315211 China

A constant-potential system driven by multiplicative dichotomous noise and subject to an input oscillatory signal is investigated. Two phenomena of stochastic resonance are observed. One is the response as a function of the noise＇s parameters; the other is that as a function of the input signal frequency. A phenomenon of multi-resonance （there are three or four peaks） is found for the response as a function of a parameter of the noise. A phenomenon of reverse-resonance is found, for which the response of the system to the signal can be weakened by the presence of the noise （there is an optimal minimum）. These results help in studies of the systems with multiplicative dichotomous noise, such as the semiconductor, the proteins motor, the chemical reaction, and so on.

关键词： stochastic resonance dichotomous noise

Thermal,Rheological and Mechanical Properties of Biodegradable Poly(propylene carbonate)/Epoxidized Soybean Oil Blends

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Chinese Journal of Polymer Science 2021年第12期39卷 1572-1580页

作者： ling Zhao Shi-ling Jia Ze-Peng Wang Yun-jing Chen Jun-Jia Bian li-jing han Hui-liang Zhang li-Song Dong Changchun UniversityofTechnology Changchun 130012China Key Laboratory of Polymer Ecomaterials Chinese Academy of SciencesChangchun Institute of Applied ChemistryChangchun 130022China Sinopec-SK(Wuhan)Petrochemical Company limited Wuhan 430000China

Biodegradable poly(propylene carbonate)(PPC)/epoxidized soybean oil(ESO)blends with different component ratios were prepared by melt blending to improve the performance of *** phase morphology,thermal properties,rheological properties and mechanical properties of the blends were in vestigated in *** exami nation revealed good in terfacial adhesi on betwee n PPC matrix and *** to DSC and DMA,as the content of ESO increased,the glass transition temperature of the PPC component increased,indicating that there was a strong in terfacial in teracti on between the PPC matrix and *** in terfacial in teraction may be caused by rin g-opening reaction between the hydroxyl end groups of PPC and the epoxy groups of ESO,which restricted the chain movement of PPC *** disappearanee of the epoxy groups in FTIR indicated that the in terfacial in teracti on betwee n the two phases was due to the rin g-openi ng reactio n betwee n PPC and *** the addition of ESO,the thermal stabilities were *** the increasing ESO content,the modulus gradually ***,the stre ngth at yield,the strength at break and the elon gation at break were in creased for the PPC/ESO blends,suggest!ng that the enhancement of the strength and toughness of PPC was achieved by the incorporation of *** rheological measurement revealed that the complex viscosity,storage modulus and loss modulus of PPC were in creased with the increasi ng ESO content at low freque ncy,which indicated that the addition of ESO enhanced the melt strength of PPC in stead of plasticizi ng PPC.

关键词： Poly(propylene carbonate) Epoxy soybean oil Compatibility Mechanical properties

Biodegradable Foaming Material of Poly(butylene adipate-co-terephthalate)(PBAT)/Poly(propylene carbonate)(PPC)

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Chinese Journal of Polymer Science 2022年第2期40卷 208-219页

作者： han-lin Tian Ze-Peng Wang Shi-ling Jia Hong-Wei Pan li-jing han Jun-Jia Bian Ying li Hui-li Yang Hui-liang Zhang Changchun University of Technology School of Chemical EngineeringChangchun 130012China Key Laboratory of Polymer Ecomaterials Chinese Academy of SciencesChangchun Institute of Applied ChemistryChangchun 130022China Jilin COFCO Biochemistry Packaging Co. Ltd.Liaoyuan 136300China

A biodegradable blend foaming material of poly(butylene adipate-co-terephthalate)(PBAT)/poly(propylene carbonate)(PPC)was successfully prepared by chemical foaming agent and screw extrusion ***,PBAT was modified by bis(tert-butyl dioxy isopropyl)benzene(BIBP)for chain extension,and then the extended PBAT(E-PBAT)was foamed with PPC using a twin(single)screw *** analyzing the properties of the blends,we found that Young’s modulus increased from 58.8 MPa of E-PBAT to 244.7 MPa of E-PBAT/PPC 50/*** viscosity of the polymer has a critical influence on the formation of *** with neat PBAT(N-PBAT),the viscosity of E-PBAT increased by 3396 Pa·s and E-PBAT/PPC 50/50 increased by 8836 Pa·***,the dynamic mechanical analysis(DMA)results showed that the storage modulus(E’)at room temperature increased from 538 MPa to 1650 *** various phase morphologies(“sea-island”,“quasi-co-continuous”and“cocontinuous”)and crystallinity of the blends affected the spread velocity of gas and further affected the foaming morphology in E-PBAT/PPC ***,through the analysis of phase morphology and foaming mechanism,we concluded that the E-PBAT/PPC 70/30 component has both excellent strength and the best foaming performance.

关键词： Poly(butylene adipate-co-terephthalate) Poly(propylene carbonate) Phase structure Biodegradable foam Extrusion foaming