摘要
利用CMT5205试验机对经过微弧氧化处理的7075铝合金试样进行拉伸实验。运用Matlab最小二乘多项式函数方法对拉伸试样建立名义应力-应变曲线。根据弹塑性理论知识,将名义应力-应变曲线转化为真实应力-应变曲线。此曲线中的非线性均匀变形阶段拟合得到铝合金微弧氧化陶瓷层本构方程。
The 7075 aluminum alloy by micro-arc oxidation was conducted tensile experiment using the CMT5205 tester. Tensile samples are established nominal stress-strain curve using the Matlab least squares polynomial function. According to the plasticity theory knowledge, the nominal stress-strain curve was translated into the true stress-strain curve. Nonlinear uniform deformation stage of the stress-strain curve fitting obtains the constitutive equation of ceramic layer of aluminum alloy by micro-arc oxidation.
出处
《热加工工艺》
CSCD
北大核心
2014年第10期143-144,147,共3页
Hot Working Technology
基金
国家自然科学基金项目(51301047)
广西制造系统与先进制造技术重点实验室课题(12-071-11-61-001)
铝合金微弧氧化陶瓷层的断裂性能研究(2013YB098)
关键词
铝合金
微弧氧化
陶瓷层
本构方程
曲线拟合
aluminum alloy
micro-arc oxidation
ceramic coating
constitutive equation
curve fitting
