冲击作用下含孔洞纤维增强复合材料平板的动力学实验与数值研究

Experimental and Numerical Study on Fiber Reinforced Comp osite Plate with Cavity under Impact Loading

作为复合材料动力学实验与数值研究的应用实例 ,实验研究采用正交异性动态光弹性方法 ,数值分析运用各向异性介质的时域边界元方法。纤维增强光弹性复合材料平板被用来模拟含孔洞的正交异性半无限域 ,用小口径步枪施加与纤维方向成 0°及 90°两个方向的冲击载荷 ,在正交异性动态光弹性实验中记录了应力波在孔洞周围的传播、反射与绕射过程 ,此过程被进一步转换成应力分量的变化时程 ,并与相应的时域边界元方法的数值分析结果进行了比较。

The paper shows an application of experimental and numerical study on composite dynamics.Dynamic orthotropic photo elasticity is employed in the experimental research and time domain boundary ele ment method for anisotropic media is adopted in the numerical analysis.Fibre-re inforced birefringent composite plate is used to model the semi-infinite orthot ropic domain with cavity.The rifle exerts the impact loading with the loading di rection parallel and perpendicular to the fiber direction.The propagation,reflec tion and diffraction of the stress wave around the cavity are recorded experimen tally.Time histories of stress components are further obtained employing the abo ve method and compared with the results from corresponding computations with tim e domain boundary element method.