摘要
为了获取巨型压机C型机架的尺寸系数,基于TCD(The Critical Distance)理论给出了缺口试样尺寸系数的有限元计算方法。首先,利用精确的有限元分析结果,获取缺口周围的应力场模型,结合材料的疲劳性能参数得出缺口试样尺寸系数;其次,运用该方法计算一系列比例放大后的缺口试样尺寸系数,同时制作出相应的几何试样并进行试验测试其尺寸系数,通过公式计算值与试验测试值的比较证实该方法的有效性。最后,根据疲劳模拟实验原理建立C型机架模拟缩比模型,利用缺口试样尺寸系数计算方法得到压机机架的尺寸系数。该方法为大型结构件的尺寸系数计算提供参考依据。
In order to calculate size coefficient of C type frame for huge pressure machine,the finite element method（ FEM） of the notched-specimen size coefficient was proposed based on TCD（ The Critical Distance） theory. Firstly,the stress field model was obtained by finite element analysis,and the size coefficient of notched-specimen could be easily calculated combining the parameters of fatigue properties of the material. Secondly,a series of size coefficient of notched-specimen were calculated by the above method,and corresponding geometry specimens were made. Furthermore,their size coefficients were tested,and the validity of this method was verified by comparing the calculated value with the tested value. Finally,the simulated-scaled model of C type frame was built according to the principle of fatigue simulation experiments,and its size coefficient of pressure machine frame was calculated by the above method. This method provides the reference for size coefficient calculation of large-scaled structure components.
出处
《锻压技术》
CAS
CSCD
北大核心
2016年第7期67-71,90,共6页
Forging & Stamping Technology
基金
贺州学院博士基金启动项目(HZUBS201303)
贺州市科技开发项目(贺科能1408013)
广西高校科研项目(KY2015ZD128)
