【摘要】 利用材料试验机装置开展了三维正交机织Kevlar/乙烯基树脂复合材料力学实验,实验表明面内经向拉伸和厚度z方向压缩时,材料具有一定的应变率效应,厚度z方向压缩强度远大于面内压缩强度,而面内经向和纬向的拉伸强度则相当。结合纤维的编织方式,对这些现象做了必要的定性分析。最后,本文基于三维正交机织复合材料的结构特点,推导了一组可用于估算三维正交机织复合材料弹性模量的公式,估算结果和实验值接近。更多还原

【Abstract】 Mechanical properties of 3D orthogonal woven Kevlar/vinyl composite were studied by a series of tests on MTS(Material Test System). The experiment results indicate that the tensile strength along the warp yarns and the compression strength along the thickness direction have certain strain rate effect,and the compression strength along the thickness is much higher than the strength in the plane,but the tensile strength along warp yarn and weft yarn are almost same.Some necessary qualitative analyses about these phenomena were carried out,considering the textile fiber style.Finally,according to the structure characters of the 3D-OWC(Orthogonal Woven Composite),a group of formula to estimate the Young’s Module,and the estimated values are in good agreement with the experimental values.更多还原