摘要
应用有限元对液压鼓胀试验进行模拟,通过SUS304材质的试样位移-载荷曲线的模拟值与试验值对比,验证有限元模型参数的准确性。考虑上夹持器在螺栓夹紧的同时发生微弱拱起,定义其几何模型由一段斜线和圆弧组成,并进行论证。提出了一种结合液压鼓胀试验和有限元两方面确定微试样材料性能的方法。对316L材料进行线性强化弹塑性模型简化,通过有限元分析计算得到的位移-载荷曲线逐步逼近试验位移-载荷曲线,反推出屈服强度和线性强化弹塑性模型的最优参数,并将其与相同材质相同厚度的材料拉伸试验得出的材料属性进行对比。
In this paper ,finite element method was adopted to establish the sus304 hydraulic bulging test model .A comparison of pressure-displacement curve between the simulation and the test has been done to ensure validity of the FE parameters .Based on the hunch-up of upper holder during the process of bolt clamping , the hypothesis of upper holder geometry that composes of an inclined straight line and an arc was proved to be reasonable . A combination of hydraulic bulging test and finite element analysis to determine the material properties of miniature-specimen has also been proposed . 316L material plastic property is simplified as linear hardening model . The pressure-displacement curves generated by finite element simulations approximate the curves of the test , thus the parameters of yield strength and linear hardening model are inversely resolved . The golden section optimization is used during the optimization process . The material property generated by tensile test was compared with the optimization results .
出处
《塑性工程学报》
CAS
CSCD
北大核心
2014年第3期116-121,共6页
Journal of Plasticity Engineering
基金
国家高技术研究发展计划:基于腐蚀的油气管道用高强钢寿命预测关键技术及微损评价技术研究(863计划)资助项目(2012AA040105)
关键词
微试样
液压鼓胀试验
反向有限元
miniature-specimen
hydraulic bulging test
inverse finite element analysis
作者简介
朱兴来，男，1990年生，硕士研究生
E-mail：dearwhk@gmail．com
