FKM标准中增材制造钛合金构件疲劳强度评估的材料参数识别  

Material Parameters Identification for Fatigue Strength Assessment of Additively Manufactured Titanium Alloy Components in the FKM Guideline

作　　者：李远杰 金海波[2] 谢隋杰 刘军 Li Yuanjie;Jin Haibo;Xie Suijie;Liu Jun(Nanjing Aerospace Sinoequip Co.,Ltd.,Nanjing 210032;Key Laboratory of Fundamental Science for National Defense-advanced Design Technology of Flight Vehicle,Nanjing University of Aeronautics&Astronautics,Nanjing 210016;Wuhu State-owned Factory of Machining,Wuhu 241007)

机构地区：[1]南京航天国器智能装备有限公司,南京210032 [2]南京航空航天大学飞行器先进设计技术国防重点学科实验室,南京210016 [3]国营芜湖机械厂,芜湖241007

出　　处：《航天制造技术》2025年第2期35-40,共6页Aerospace Manufacturing Technology

基　　金：国家重点研发计划(2018****105800)。

摘　　要：FKM标准主要用于钢、铸铁和铝合金构件的静强度及疲劳强度评估,其中aG和bG、aM和bM是评估计算必要的2组材料参数。以增材制造的TA15钛合金中心缺口板状试样为研究对象,通过建立有限元模型计算应力场分布,结合FKM标准和Neuber-Kuhn表达式,得出一组材料参数aG和bG,再对27件试样进行疲劳试验并拟合出S-N曲线,利用FKM标准计算公式,逆向推算得到一组材料参数aM和bM。2组参数可用于增材制造钛合金构件的疲劳强度评估,拓展了FKM标准的适用范围。The FKM guideline is primarily used for assessing the static and fatigue strength of components made of steel,cast iron,and aluminum alloys,with aG and bG,as well as aM and bM,being the two most critical material parameter groups for these assessments.This study focused on additively manufactured TA15 titanium alloy specimens with a center-notched plate design.A finite element model was established to calculate the stress field distribution,and the FKM Guideline along with the Neuber-Kuhn expression was used to derive the material parameters aG and bG Subsequently,fatigue tests were conducted on 27 specimens to obtain an S-N curve through fitting,and the parameters aM and bM were inversely calculated using FKM guideline formulas.These two sets of parameters enable the fatigue assessment of additively manufactured titanium alloy components,extending the applicability of the FKM guideline.

关 键 词：增材制造 钛合金 FKM标准 参数识别 疲劳试验 

分 类 号：V215.5[航空宇航科学与技术—航空宇航推进理论与工程]