摘要
基于Hill 48屈服准则,在ABAQUS/Explicit平台上建立了考虑TA1板材各向异性的球面件拉深成形三维有限元模型,模拟研究材料厚向异性和面内异性对其厚度和等效塑性应变分布的影响规律,并与基于各向同性屈服准则的模拟结果和试验结果进行了对比。结果表明,TA1板材的r值越大,拉深胀形区的厚度分布越均匀,最小厚度发生的位置高度越低;拉深件最大厚度变薄率越小,但拉深区加工硬化显著;与各向同性准则相比,该模型获得了与试验更吻合的结果,准确的描述了TA1球面件拉深过程中的各向异性效应。
Considering anisotropy of TAlblank, 3D FE model of spherical part deep drawing is established on the platform of ABAQUS/Explicit based on Hi11＇48 anisotropic yield criterion. The effect of normal and planar anisotropy to thickness and equivalent plastic strain distribution are studied and compared with the results of simulation based on isotropic yield criterion and experiments. The results show that with the increase of r value of TA1 blank, the thickness distribution of bulging areas of spherical part is more homogeneous, the position of the minimal thickness is lower and the maximal thickness reduction ratio is decreased, but at the same time the work hardening is notable at the drawing area. Compared with isotropic yield criterion, the results obtained by the new model agree with experiment better.
出处
《塑性工程学报》
CAS
CSCD
北大核心
2010年第2期11-16,共6页
Journal of Plasticity Engineering
基金
国家自然科学基金资助项目(50805121)
中国博士后科学基金资助项目(20080440192)
关键词
钛合金
各向异性
球面件
冷拉深
有限元模拟
titanium alloy
anisotropy
spherical part
cold deep drawing
finite element simulation
