孔隙对3D打印功能梯度材料验证轮盘破裂转速影响分析  

Effect of Pores on Burst Speed of Functionally Graded Material Validation Turbine Disk Manufactured by 3D Printing

作　　者：杨雅丽 赖希宁 赵伟 叶超[1] 陈云[1] 陈立杰[1] YANG Yali;LAI Xining;ZHAO Wei;YE Chao;CHEN Yun;CHEN Lijie(Xiamen University,Xiamen 361005,China;AECC Sichuan Gas Turbine Establishment,Mianyang 621000,China)

机构地区：[1]厦门大学,厦门361005 [2]中国航发四川燃气涡轮研究院,绵阳621000

出　　处：《航空制造技术》2023年第13期94-101,共8页Aeronautical Manufacturing Technology

基　　金：中国航发自主创新专项资金(ZZCX-2018-017)。

摘　　要：目前多材料融合3D打印技术对于短寿命、低成本小型发动机的研发具有很好的应用前景,如3D打印功能梯度材料在新型涡轮盘典型热端关键部件上的应用。为探究3D打印技术产生的孔隙缺陷对涡轮盘破裂转速的影响,基于极限应变法开展了500℃测试均匀温度场及真实温度场下功能梯度材料验证轮盘的破裂转速分析。研究中主要考虑孔隙率、大孔隙所处区域、大孔隙个数、孔隙间距及孔隙与起裂位置的距离等孔隙缺陷表征参量及相关因素对验证轮盘破裂转速的影响。研究结果表明,对于3D打印轮盘的性能分析,不能只考虑孔隙缺陷的随机分布,分布于高应变区(危险截面)的大孔隙将导致验证轮盘破裂转速的显著下降,在3D打印时应严格控制距离预测起裂位置较近的高应变区域内的缺陷。At present,the multi-material fusion 3D printing technology has a good application prospect for the development of short-life and low-cost small engines,such as the application of 3D printing functionally graded materials in the typical hot section parts of new-type turbine disk.In order to explore the influence of pore defects generated by 3D printing technology on the burst speed of turbine disk in aero-engine,the burst speed analysis of functionally graded material validation turbine disk was carried out based on the strain-based fracture criteria under the testing uniform temperature field of 500℃and the real temperature field respectively.Our studies mainly focus on the influences of pore defect characterization parameters and related factors,such as porosity,the position of large pores located,the number of large pores,large-pore spacing and the distance between large pore and bursts initiation position on the burst speed of validation turbine disk.The results show that the random distribution of pore defects is not the only consideration for the performance analysis of 3D printed disk.The large pores distributed in the high-strain region(hazard section)will lead to a significant decrease in the burst speed of validation turbine disk,and the defects in the high-strain region,close to the predicted bursts initiation position,should be strictly controlled during 3D printing.

关 键 词：破裂转速 孔隙 3D打印 功能梯度材料 有限元方法 

分 类 号：V263[航空宇航科学与技术—航空宇航制造工程]