摘要
为了研究SUS304不锈钢材料的损伤和塑性断裂行为,利用有限元软件ABAQUS提供的二次接口,开发了基于Lemaitre本构模型的VUMAT用户材料子程序。然后在万能试验机上对标准试样进行加载卸载实验得到SUS304不锈钢的应力应变数据,并根据弹性模量变化法拟合得到SUS304不锈钢的损伤参数。通过有限元软件ABAQUS进行VUMAT子程序的单胞测试,验证了子程序的正确性。最后对标准试样进行有限元仿真模拟,结果显示Lemaitre模型比Johnson-Cook模型仿真得到的力-位移拟合曲线精度更高,断裂拟合位置也更接近实验值,验证了损伤参数的准确性和有效性;且通过Lemaitre模型子程序仿真输出的结果可以直接观测损伤值D的增长和分布规律。
To examine the damage and plastic fracture behavior of SUS304 stainless steel,the VUMAT user material subroutine based on the Lemaitre constitutive model was developed using the secondary interface provided by the finite element software ABAQUS. Then the stress and strain data of SUS304 stainless steel was obtained by loading and unloading the standard specimens on the universal testing machine,and the damage parameters of SUS304 stainless steel were fitted according to the elastic modulus change method. The unit cell test of the VUMAT subroutine was conducted by finite element software ABAQUS,and the correctness of the subroutine was verified. Finally,the finite element simulation of the standard specimens was performed. The results show that the accuracy of force-displacement fitting curve obtained by Lemaitre model is higher than that obtained by Johnson-Cook model,and the fitted fracture position is closer to the experimental position,which verify the accuracy and effectiveness of the damage parameters. Besides,the growth and distribution of the damage value D can be directly observed through the simulation output of the Lemaitre model subroutine.
作者
王治磊
周杰
杨波
易力力
董建鹏
熊江茗
WANG Zhi-lei;ZHOU Jie;YANG Bo;YI Li-li;DONG Jian-peng;XIONG Jiang-ming(State Key Laboratory of Mechanical Transmission,Chongqing University,Chongqing 400044,China)
出处
《塑性工程学报》
CAS
CSCD
北大核心
2020年第11期167-173,共7页
Journal of Plasticity Engineering
基金
国家自然科学基金资助项目(51975074)
中央高校基本科研业务费(2018CDQYJX0013)。
