镍基单晶合金热弹塑性应力-应变场数值模拟

Numerical Simulation of Thermo Elastic-Plastic Stress-Strain for Single Crystal Nickel-Based Superalloy

利用ANSYS有限元结构分析软件的参数化设计语言APDL和用户可编程特性UPFs,将考虑拉-剪耦合效应的镍基单晶合金屈服准则和弹塑性本构模型集成到ANSYS软件中,实现对镍基单晶合金弹塑性有限元应力-应变场的分析。对温度为680℃的[001]、[011]和[111]3种取向的DD3镍基单晶合金试样进行单向拉伸热弹塑性应力-应变数值模拟,并与试验数据进行对比,最后,对单晶涡轮盘片进行循环应力应变分析。

Based on the yield criterion and constitutive model of taking into account the effects that the components of tension stresses couple with components of torsional stresses for single crystal Nickel-based superalloya,subroutine to calculating the thermo elastic-plastic stress-strain of single crystal Nickel-based superalloy on ANSYS platform is developed by APDL and UPFs of ANSYS.Numerical simulation of uniaxial tension thermo elastic-plastic stress-strain for single crystal nickel-based superalloy specimens at 680 ℃ is done along different orientations [001][,011] and [111]a,nd the calculating results is validated by test data.At lastt,he three dimensional nonlinear cyclic stress-strain of single crystal turbine disk-blade assembly is analyzed.