Abstract In this paper, the ultimate strength of unstiffened steel plates under uniaxial in-plane compression is numerically studied considering the local lateral impact of a rigid-body impactor. The plates are made of mild steel, where its behaviour is modelled by using the Johnson-Cook material model. The material parameters of the Johnson-Cook material model calibrated by the authors were employed for predicting the behaviour of the target in order to numerically reproduce the impact tests. The value of average in-plane stress of the plates is determined accounting for the collision of rigid-body impactor with masses of 50–150 gr and velocities of 400–1200 m/s. Moreover, the effects of stress waves induced as a result of lateral impact of the rigid-body impactor on the ultimate strength of the plates under uniaxial in-plane compression are also assessed. The results indicate that the ultimate strength of the plate decreases due to stress-wave creation and thus, it is required to take that into account. Besides, it is revealed that assuming the final damaged state of the plate after being laterally impacted by the rigid-body impactor as an initial condition, does not yield a correct response when evaluating its ultimate compressive strength under uniaxial in-plane compression.

中文翻译：

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局部横向高速冲击对单轴面内压缩未加筋钢板极限强度影响的详细有限元研究

摘要 本文考虑了刚体冲击器的局部横向冲击，对单轴面内压缩下未加筋钢板的极限强度进行了数值研究。板由低碳钢制成，其行为通过使用 Johnson-Cook 材料模型进行建模。由作者校准的 Johnson-Cook 材料模型的材料参数用于预测目标的行为，以便在数值上重现冲击试验。考虑到质量为 50-150 gr 且速度为 400-1200 m/s 的刚体撞击器的碰撞，确定了板的平均面内应力值。而且，还评估了由于刚体冲击器的横向冲击而引起的应力波对单轴面内压缩下板的极限强度的影响。结果表明，由于应力波的产生，板的极限强度会降低，因此需要考虑到这一点。此外，还表明，假设板在受到刚体冲击器横向冲击后的最终损坏状态作为初始条件，在评估其在单轴面内压缩下的极限抗压强度时不会产生正确的响应。