Study on Temperature-Dependent Tensile Strength ofShort-Fiber-Reinforced Elastomer Matrix Composites
The temperature-dependent tensile strength is an important indicator used to evaluatecombination property of short-fiber-reinforced elastomer matrix composite.Someshort-fiber-reinforced elastomer matrix composites are manufactured in the molding preparationprocess,and the tensile tests of fiber,matrix and the composites are carried out at differenttemperatures.The fiber length and orientation distributions are statistically analyzed.The influence oftemperature on the micromechanical stress distribution and transfer in the composite is investigated,and the thermal stresses in the fiber,matrix and fiber-matrix interface are obtained.Based on thetheory of micromechanical stress distribution and transfer of the fibrous composite,the mixture law ismodified,and a model for predicting the temperature-dependent tensile strength of this kind ofcomposite is developed.Moreover,the mechanism of the tensile fracture of the composite at varioustemperatures is discussed.Research indicates that the tensile strength is largely related to thetemperature,mechanical performances of the main components of the composite and somemicrostructural parameters,such as short fiber aspect ratio,volume fraction and orientationdistribution.The tensile strength of SFRE decreases with increasing temperature.The tensile strengthincreases with the increase of fiber length when the fiber length is no larger than critical fiber length.There exists a critical fiber volume fraction where the tensile strength of SFRE reaches the maximum.The tensile fracture of the composite depends largely on the temperature,the bond strength offiber-matrix interface and the average length of reinforcing short fibers.The temperature-dependenttensile strengths predicted by the presented model are in good agreement with experimental data.
short fiber composite temperature-dependent tensile strength fractu
D.S.Zhu B.Q.Gu Y.Chen
College of Mechanical and Power Engineering,Nanjing University of Technology,No.5 Xin Mo Fan Road,Nanjing 210009,China
国际会议
成都
英文
2008-08-04（万方平台首次上网日期，不代表论文的发表时间）