Material behavior beyond the elastic limit can be rate-dependent, and this rate sensitivity can be captured by the viscoplastic material models. To describe the viscoplastic material behavior in structural analysis, an efficient numerical framework is necessary. In this paper an algorithm is proposed for metals for which von Mises yield surface along with Perić’s viscoplastic model is employed. The efficiency and accuracy of the technique is examined by comparison with different numerical studies. The convergence rate of the proposed algorithm is investigated. Characteristics of the viscoplastic behavior such as relaxation are illustrated in the selected case studies. Finally, application of the algorithm in practice is demonstrated by a boundary value problem.

超出弹性极限的材料行为可能与速率有关，而这种速率敏感性可以由粘塑性材料模型捕获。为了描述结构分析中的粘塑性材料行为，必须建立一个有效的数值框架。本文提出了一种针对金属的算法，该算法采用冯·米塞斯（von Mises）屈服面以及Perić的粘塑性模型。通过与不同的数值研究进行比较，检验了该技术的效率和准确性。研究了该算法的收敛速度。在选定的案例研究中说明了粘塑性行为（如松弛）的特征。最后，通过边值问题证明了该算法的实际应用。