新闻资讯
7050-T7451铝合金铣削加工表面材料特性与本构关系模型的建立
发布人：上海艾荔艾金属材料有限公司www.shailiai.com
更新时间：2015-12-03
为研究7050-T7451铝合金材料铣削后表面应力应变特征，并建立表面材料本构关系模型，采用SSM-B4000TM型应力应变显微探针测试系统对铝合金7050-T7451材料表面进行自动球压痕(ABI)实验测试。
7050-T7451铝合金铣削加工表面材料特性与本构关系模型的建立Milling surface properties of 7050-T7451aluminum alloy and establishment of constitutive model
为研究7050-T7451铝合金材料铣削后表面应力应变特征，并建立表面材料本构关系模型，采用SSM-B4000TM型应力应变显微探针测试系统对铝合金7050-T7451材料表面进行自动球压痕(ABI)实验测试，获得载荷-深度曲线，据此估算本构关系模型中应变硬化指数(n)与屈服强度(σy)等未知参数。进而基于有限元建模(FEM)进行压痕过程的有限元仿真分析，研究本构关系模型中参数n与σy的变化对载荷-深度曲线的影响规律，获得仿真载荷-深度曲线与实验曲线误差最小时的参数n与σy应满足的函数关系，验证了基于实验本构关系模型参数的准确性。采用该材料本构关系模型仿真的载荷-深度曲线与实验曲线相比，平均误差为5.2 %。
In order to investigate the stress-strain properties of milling surface for 7050-T7451 aluminum alloy, and also to establish the constitutive model, automated ball indentation (ABI) test was carried out on the SSM-B4000TM stress-strain microprobe system. The load-depth curve was obtained. Unknown parameters such as strain hardening exponent n and yield strength σy were obtained based on this curve. Furthermore, indentation processes were simulated based on finite element method (FEM). Accordingly, the influence rules of the changes of parameters n and σy on load-depth curve were studied. The functional relationship between parameters n and σy was obtained when the error of load-depth curve between the simulation result and experimental value is the lowest. At last, the validity of parameters n and σy in constitutive model obtained from ABI test was proved. Under this constitutive model, the average error between simulation load-depth curve and the test one is 5.2%.
获取更多我们供应的合金和服务信息，请致电086-021-67660801或发电子邮件kefu@ailiaigroup.com联系我们，您也可以通过微博和微信和我们互动。
For more information on the alloys and services that we supply, call us at 086-021-67660801 or email us at kefu@ailiaigroup.com. You can also get in touch on social media, we are constantly active on Weibo and Weixin.