Abstract Plasticity is inevitable during contact with a high load, and thus should be considered when simulating high-load contact. Plasticity during non-conformal contact has been well studied. However, no contact law that considers plasticity during conformal contact has been developed, even though such ``plastic conformal contact'' commonly occurs in journal-bearing systems under high loads. Herein, we constructed a plastic Winkle model of plastic conformal contact, and integrated it into a contact solver to simulate the impact dynamics of a single journal-bearing system. The plastic contact law was first verified by finite-element simulations, which were in good agreement with the plastic indentation observed during loading and unloading. To study the plasticity during conformal impact, we integrated the contact law into a dynamic-contact model of the single journal-bearing system. The results indicate that the energy dissipation due to plasticity was much greater than that from damping and friction. Ignoring plasticity may result in an unrealistic travel distance of the journal during impact. The developed model was used to construct a velocity map to determine whether or not that plasticity should be considered.

中文翻译：

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塑性对轴颈轴承系统动态冲击的影响：平面情况

摘要 高载荷接触过程中不可避免地会产生塑性，因此在模拟高载荷接触时应考虑塑性。非共形接触期间的可塑性已得到很好的研究。然而，尚未开发出考虑共形接触期间塑性的接触定律，即使这种“塑性共形接触”通常发生在高载荷下的轴颈轴承系统中。在此，我们构建了塑性共形接触的塑性 Winkle 模型，并将其集成到接触求解器中以模拟单个轴颈轴承系统的冲击动力学。塑性接触定律首先通过有限元模拟得到验证，这与在加载和卸载过程中观察到的塑性压痕非常吻合。为了研究保形冲击期间的塑性，我们将接触定律集成到单个轴颈轴承系统的动态接触模型中。结果表明，塑性引起的能量耗散远大于阻尼和摩擦引起的能量耗散。忽略可塑性可能会导致在冲击过程中轴颈的移动距离不切实际。开发的模型用于构建速度图以确定是否应考虑可塑性。