Question

急求ansys高手啊！！！！我在ANSYS钢筋混凝土非线性分析中出现材料本构关系的错误

错误如下
*** FATAL *** CP = 2062.453 TIME= 13:19:43
The supplied nonlinear material properties produced an incorrect
material tangent matrix. Please check your TB input carefully. A
very small yield stress may cause this failure.
上面显示材料的本构关系模型的有问题，可我觉得没有问题啊
下面是我本构关系的命令流：
!定义混凝土本构模型
FC=23.1e6 !单轴抗压强度
FT=1.89e6
tb,concr,1 !混凝土破坏准则W-W5参数
tbdata,,0.2,0.95,FT,-1
tb,miso,1,,11 !混凝土应力应变曲线，用MISO模型
tbpt,,0.0002,fc*0.19
tbpt,,0.0004,fc*0.36
tbpt,,0.0006,fc*0.51
tbpt,,0.0008,fc*0.64
tbpt,,0.001,fc*0.75
tbpt,,0.0012,fc*0.84
tbpt,,0.0014,fc*0.91
tbpt,,0.0016,fc*0.96
tbpt,,0.0018,fc*0.99
tbpt,,0.002,fc
tbpt,,0.0033,fc

mp,ex,2,2.0e11 !贯穿钢筋
mp,prxy,2,0.3
mp,dens,2,7850
tb,bkin,2 !贯穿钢筋的应力应变关系，用BKIN模型
tbdata,,300e6,0

急求！！已经一个星期了，没找到错误在哪，马上就要交报告！！！！

Answer 1

你没有定义混凝土的弹模吧，定义本构关系的时候要注意曲线第一点要与弹性模量相一致！

Answer 2

你没定义混凝土的弹性模量，泊松比这些弹性材料信息

Answer 3

a