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Properties of Nanokaolin and Its rubber composites

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Journal of China University of Mining and Technology 2005年第4期15卷 317-321页

作者： ZHANG Yu-de LIU Qin-fu JI Lei-bo LU Yin-ping School of Resources and Safety Engineering China University of Mining and Technology Beijing 100083 China

A kind of nanokaolin powder with a thickness of 20-50nm and an average diameter of 300nm is produced through combined procedure of purification, delamination, surface modification and pulverization. The application experiments in butadiene rubber (BR), ethylene-propylene diene methylene (EPDM), and natural rubber (NR) indicates that this nano-kaolin powder material is much better than precipitated silica in reinforcement, while in styrene-butadiene rubber (SBR) it is close to precipitated silica. Nanokaolin is of superiority in elasticity, elongation at break, anti-flexure property.

关键词： nanokaolin properties rubber composites

Fatigue Damage Accumulation of Steel/rubber Composite

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Journal of Materials Science & Technology 2006年第5期22卷 647-650页

作者： Zhenhui TIAN Huifeng TAN Xingwen DU Center for Composite Materials Harbin Institute of Technology Harbin 150001 China

The fatigue damage accumulation of [±20°] laminated steel cord reinforced rubber composite under T-T loading was studied. Results indicate that the increase in the cyclic maximum strain exhibits three-stage tendency in the process of fatigue. The macroscopic fatigue damage initiates from the ends of steel cords in the form of cylindrical crack. Damage propagates along with the increase in crack numbers, the cord/matrix interface debonding and the growth of interply cracks. By using the dynamic creep as parameter, a linear fatigue damage accumulation model was established. This model can be used under dual loading conditions to estimate the residual fatigue life of the specimen.

关键词： rubber composites Fatigue Dynamic creep Damage accumulation

A subregional model for delamination prediction of rubber composite under fatigue loading

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Journal of Harbin Institute of Technology(New Series) 2005年第3期12卷 255-260页

作者：田振辉谭惠丰 Institute of Engineering Mechanics China Earthquake Bureau Harbin 150080 China Center for Composite Materials Harbin Institute of Technology Harbin 150001 China

Results from fatigue experiments of cross-laminated steel cord-rubber composites (SCRC) indicate that fatigue damage life can be categorized into three regimes. In terms of fatigue modes, a subregional fatigue model is developed to describe the damages evolution of SCRC under fatigue loads. Firstly, finite element analysis is introduced to determine interply stress distribution of the specimen. Then, based on the experimental fatigue data, subregional models are introduced to simulate relations between maximum strain, effective stiffness, delamination shear stress and fatigue cycles. Relations between crack density, delamination length growth rate, macro crack density and cycles are modeled by two semi-empirical models. A reasonable prediction result was achieved by the current model, where model parameters can be determined by basic outputs of fatigue testing.

关键词： Fatigue crack density delamination rubber composites FEA