Researchers have met the challenge of modeling impact events involving composite targets for a variety of applications in a variety of ways. In this paper, the theory and implementation details of an orthotropic visco-elastic-visco-plastic material model with strain rate dependence are discussed. The model is driven by experimental data from quasi-static as well as high strain rate tests, and the data is used in defining the deformation, damage and failure sub-models. Validation data is generated by shooting a hollow 50 g Al-2024 projectile at different velocities against a flat panel target made of unidirectional composite material in a 16-ply [(0/90/45/-45)₂]_S layup. Explicit dynamic finite element analyses of four high speed tests involving one contained (projectile rebounded) and three uncontained (projectile penetrated) impact tests show that the developed material model and modeling techniques yield reasonable and acceptable predictions.

研究人员已经遇到了以各种方式对涉及各种应用的复合目标的撞击事件进行建模的挑战。在本文中，讨论了具有应变率相关性的正交各向异性粘弹粘塑性材料模型的理论和实现细节。该模型由来自准静态和高应变率试验的实验数据驱动，这些数据用于定义变形、损坏和失效子模型。验证数据是通过以不同速度向由单向复合材料制成的 16 层 [(0/90/45/-45) ₂ ] _S上篮。四个高速测试的显式动态有限元分析涉及一个包含（弹丸反弹）和三个未包含（弹丸穿透）冲击测试表明开发的材料模型和建模技术产生了合理和可接受的预测。