金属力学行为中应变路径效应的研究进展

Development of strain path effects on the mechanical behaviors of metals

在塑性加工中,金属的力学行为强烈依赖于所经历的应变路径;另外,有限元数值计算领域对应变路径效应的研究需求也越来越迫切。因此,应变路径效应的研究重新受到研究者的关注。结合文献调研和研究经历,详细介绍了目前应变路径效应的研究进展。首先介绍了应变路径的表征方法,并分析了各个表征方法的适用范围和局限性。其次,综述了应变路径对金属力学行为的影响规律,分析了导致应变路径效应的微观机理,并介绍了现有的几种考虑应变路径效应的数值模型,以及应变路径效应在塑性加工技术中的应用。最后,对金属材料力学行为中应变路径效应未来的研究方向进行了展望。

During metal plastic forming,the mechanical behavior strongly depends on the strain path. In addition,the investigation of strain path effects is demanded more and more urgently in finite element numerical calculation. Therefore,it attracts many concerns again recently. Based on the literature survey and investigating experience,the development of strain path effects was introduced in detail. Firstly,the expression of strain path was introduced,and its application and localization were analyzed. Secondly,the influence of strain path on mechanical behaviors of metal was reviewed,and the micro mechanisms were also analyzed. Then,several numerical models considering strain path effects were introduced,and the applications of strain path effects in metal forming technology were reviewed. Finally,the prospects of future research direction for strain path effects in mechanical behaviors of metal were given.