摘要
晶体塑性作为突破宏观塑性均匀化局限性的重要理论手段,有助于关联微观变形与宏观性能,实现材料力学行为的精准预测。本文综述了晶体塑性变形运动学与晶体塑性变形基础,对比了唯象型晶体塑性本构模型与机理型晶体塑性本构模型的优缺点。根据单晶体塑性模型与多晶体塑性模型的本质及其联系引出均匀化模型,对全场晶体塑性模型与平均场晶体塑性模型进行介绍,列举了晶体塑性有限元模型在工程应用中的代表性实例。阐述了该模型应用的突破性进展,提出多晶体塑性模型的不足与晶体塑性理论的局限性,并对其未来的发展趋势进行了展望。
Crystal plasticity,as an important theoretical approach for overcoming the limitations of macroscopic plastic homogenization,helps to link microscopic deformation with macroscopic properties and enables accurate prediction of material mechanical behavior.The kinematics of crystal plasticity deformation and the basis of crystal plastic deformation are reviewed in this paper.The advantages and disadvantages of the phenomenological crystal plasticity constitutive model and the mechanical crystal plasticity constitutive model were compared.According to the relationship between the single crystal plasticity model and the polycrystalline plastic model as well as their respective natures,the homogenization model is introduced,and the full-field crystal plastic model and the mean-field crystal plastic model are introduced.Representative examples of crystal plasticity finite element models in engineering applications are presented,and the breakthroughs brought by the application of this model are elaborated.The shortcomings of polycrystalline plasticity models and the limitations of the theory of crystal plasticity are proposed,and future development trends are proposed.
作者
孙进
张同先
王寅杰
SUN Jin;ZHANG Tongxian;WANG Yinjie(Kehua Holdings Co.,Ltd.,Changzhou 213001,China)
出处
《铸造技术》
2026年第1期77-99,共23页
Foundry Technology
关键词
晶体塑性
塑性变形
本构模型
均匀化模型
有限元模型
crystal plasticity
plastic deformation
constitutive models
homogenization model
finite element model
