平纹织物复合材料的弹性模量预测

利用细观力学的代表体积元(RVE)法,预测了平纹织物复合材料的弹性模量。建立了表征RVE形态的数学模型,分析了细观结构与宏观性能之间的关系,编制了从组分材料的弹性性能推测复合材料的弹性性能的预测程序。对理论预测进行了实验验证,理论值与实测值在一定误差范围内能较好吻合,说明此预测方法具有一定的可靠性。

PREDICTION FOR ELASTIC PROPERTIES OF PLAIN WEAVE FABRIC COMPOSITES

The theoretical analysis and experimental verification aboutthe elastic properties of Plain Weave Fabric Composites( PWFC) is discussed in this article.Representative Volume Element ( RVE) method is used to predictthe elastic properties according to those of raw materials of PWFC. RVE method belongsto micromechanics,in which an elementthatcan representthe propertiesof the whole material isselected and studied,thus the contribution of fiber,resin,interface can be analyzed respectively.The simplest unit cell of PWFC is taken out as RVE in this research.A mathematics model based on RVE issetup and the yarn shape in the compositesis regarded assinusoidal.The re- lationship between micro structure and macro properties is analyzed.A predictorprogram is made for predicting quickly.The predictor software programmed with Visual Basic has some convenient fea- tures.With considering all factorsof the yarn geometric shape,the fiber volume contentand the hol- low rate,the theoretically elastic data of PWFC can be predicted.Compared experimentsare done by using lay- outand RTM processto make samples.The relatively smallerror between the experimental resultand predicted data proves the feasibility of the mathematics model and predictor method.