This work investigates the high strain rate behavior of AP-PLY composites. The large representative volume elements and brittle nature of this material necessitated the use of a bespoke Split-Hopkinson bar apparatus. AP-PLY and baseline laminates were subjected to tensile loading at strain rates of 30 s${}^{\mathrm{-1}}$. Results were compared with quasi-static data to evaluate whether the laminate architecture introduced any strain rate dependency. In addition, the dynamic experiments were simulated using a multiscale modeling framework, providing further insights into the micromechanisms governing material behavior. The moduli of the AP-PLY composites were found to be strain rate independent, however, strengths were found to be marginally higher than those of their baseline counterparts. At high strain rates, the strain concentrations induced by the geometry of the individual tapes at through thickness undulations and tow boundaries were less significant due to reduced out-of-plane tow straightening and delamination. As a result, no reduction in AP-PLY strength in comparison to the baseline laminates was obtained. These differences in deformation micromechanisms led to an improvement of the damage tolerance when subjected to dynamic loading.

这项工作研究了 AP-PLY 复合材料的高应变率行为。这种材料具有代表性的大体积元素和脆性特性需要使用定制的 Split-Hopkinson 杆装置。AP-PLY 和基线层压板以 30 秒的应变速率承受拉伸载荷${}^{\mathrm{-1}}$. 将结果与准静态数据进行比较，以评估层压结构是否引入了任何应变率依赖性。此外，动态实验使用多尺度建模框架进行模拟，进一步深入了解控制材料行为的微观机制。发现 AP-PLY 复合材料的模量与应变率无关，然而，发现强度略高于其基线对应物。在高应变率下，由于平面外丝束矫直和分层减少，单个带的几何形状在厚度起伏和丝束边界处引起的应变集中不太显着。结果，与基线层压板相比，AP-PLY 强度没有降低。