摘要
本文根据各向同性和各向异性硬化模型,利用有限单元法计算了双相钢的反向(压缩)流动曲线.计算结果清楚地揭示了由塑性变形不均匀产生的相应力对Bauschinger 效应的影响规律:使反向曲线在较低的载荷下进入屈服,初始流动阶段具有较高的硬化率,不产生永久软化.
The Bauschinger effect(BE)in dual phase steels was computationally simulated and
the influence of phase stresses,developed due to non-homogeneous deformation during
preloading on the BE was investigatcd,lsotropic and anisotropic hardening models were
used in finite element method calculation to produce the reverse flow stress-strain curves
(compression)of dual phase steels from the rcversc stress-strain cnrves of single phase ma-
terials.Aspects of the Bauschinger effect,including the rounding of the revcrsc flow curve,
yielding at low reverse stress,high initial work hardcning rate,the absence of permanent
softening etc.,were elucidated by the variation in phase strcsscs in the constituent phase.
出处
《西安交通大学学报》
EI
CAS
CSCD
北大核心
1990年第1期1-8,共8页
Journal of Xi'an Jiaotong University
基金
中国科学院科学基金资助项目
关键词
双相钢
相应力
包氏效应
有限元法
Bauschinger effect
finite element method
residual stress
