摘要
为了研究材料性能参数对管材数控绕弯过程截面畸变的影响规律及敏感性大小,基于ABAQUS非线性有限元平台,建立了高强TA18钛管数控绕弯成形过程有限元模型,并通过文献中的实验结果验证了模型的可靠性,然后采用该模型模拟研究了材料性能波动下高强TA18钛管数控绕弯成形过程的截面畸变行为。结果表明:截面畸变率随着弹性模量、硬化指数的增加或强度系数、厚向异性指数的减小而减小,其减小率分别为11.76%,23.67%,12.07%和23.51%;不同材料性能参数波动下,高强TA18钛管绕弯过程截面畸变率的最大值均小于4.00%,并且在弯曲平面附近,截面畸变率出现负值;截面畸变率对材料性能参数的敏感性大小依次为强度系数、弹性模量、硬化指数和厚向异性指数。
In order to study the influence rule and sensitivities of material property parameters on cross section deformation of tube in numerical control（NC） rotary draw bending process,a finite element（FE） model of high strength titanium tube TA18 in NC rotary draw bending process was established by ABAQUS software,and its reliability was validated by experiment results in literature.Then,the cross section deformation behaviors of high strength titanium tube TA18 in NC rotary draw bending process were numerically studied by the model under material property variations.The results show that the cross section deformation ratio decreases with the increasing of elastic modulus and hardening exponent or with the decreasing of strength coefficient and normal anisotropy exponent,and the decrease rates are11.76%,23.67%,12.07% and 23.51% respectively.The maximum value of cross section deformation ratio is less than 4.00% under different material property variations,and the cross section deformation ratio shows a negative value near the bending plane.Furthermore,the sensitivities of cross section deformation ratio to material property parameters from high to low are strength coefficient,elastic modulus,hardening exponent and normal anisotropy exponent.
出处
《锻压技术》
CAS
CSCD
北大核心
2017年第7期158-163,共6页
Forging & Stamping Technology
基金
江西省教育厅科学技术研究项目(GJJ150810)
轻合金加工科学与技术国防重点学科实验室开放课题研究基金项目(gf201501001)
江西科技师范大学博士科研启动基金项目(BSJJ2015015)
关键词
高强TA18钛管
材料性能参数
截面畸变
数控绕弯
有限元分析
high strength titanium tube TA18
material property parameters
cross section deformation
NC rotary draw bending
FE analysis
