Ni基单晶叶片粘塑性分析

推进技术 ›› 1996, Vol. 17 ›› Issue (3): 50-55.

Ni基单晶叶片粘塑性分析

岳珠峰,吕震宙,郑长卿,尹泽勇

西北工业大学工程力学系;西北工业大学工程力学系;西北工业大学工程力学系;南华动力机械研究所

发布日期:2021-08-15
基金资助:
航空基金,西安交大力学开放基金

A VISCOPLASTIC CRYSTALLOGRAPHIC ANALYSIS OF A NICKEL-BASE SINGLE CRYSTAL BLADE

Dept.of Engineering Mechanics,Northwestern Polytechnical Unly.,Xi’an,710072;Dept.of Engineering Mechanics,Northwestern Polytechnical Unly.,Xi’an,710072;Dept.of Engineering Mechanics,Northwestern Polytechnical Unly.,Xi’an,710072;Nanhua Powerplant Research lust’, Zhuzhou,412002

Published:2021-08-15

摘要/Abstract

摘要： 从位错滑移机理出发，建立了一种适用于Ｎｉ基高温单晶结构分析用的晶体滑移粘塑性本构模型。该模型将八面体、十二面体及六面体滑移系作为潜在的开动滑移系，考虑阻应力和背应力两种内应力状态参量。利用某Ｎｉ基单晶叶片材料在７００℃和９５０℃的试验结果对模型进行了考核并标定了模型参数。进而将所建模型编入有限元结构分析软件中，对某型发动机单晶叶片进行了计算分析。

关键词: 叶片;镍基合金;粘塑性;应变率;有限元法;本构方程

Abstract: Based on dislocation theory,an unified anisotrOPic crystallographic constitute has been developed for nickel-base single crystal superalloys.Detahedral{111} <110>,{111}<112> and cubic{100}<110> slip systems are consdered in the model.The constitute utilizes drag stress and back stress state variables to model the local inelastic flow.The model was tested with the experiments of nickel-base crystal superalloy DD3 at 700 ℃ and 950℃ The model parameters have been also simultaneously obtained at the two temperatures.The constitute has been implemented into a structure finite element program. The strength and life of a nickel-base single crystal turbine blade have been calculated.

Key words: Blade;Nickel base superalloy;Viscoplasticity;Strain rate;Finite element method;Constitutive equation

岳珠峰,吕震宙,郑长卿,尹泽勇. Ni基单晶叶片粘塑性分析[J]. 推进技术, 1996, 17(3): 50-55.