Question

ansys 出错了 请教高手

我在算钢筋混凝土结构应力时，出现了以下的错误：
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.
有哪位高人知道这应该如何处理？很急呀~
先在此谢谢啦~
MP,EX,1,1.3585E10 !灌芯混凝土弹性模量
MP,PRXY,1,0.2 !泊松比
MP,DENS,1,2500
FC1=14.3E6
FT1=1.43E6
TB,MISO,1,,10
TBPT,,0.0002,FC1*0.19 !混凝土应力应变数据
TBPT,,0.0004,FC1*0.36
TBPT,,0.0006,FC1*0.51
TBPT,,0.0008,FC1*0.64
TBPT,,0.0010,FC1*0.75
TBPT,,0.0012,FC1*0.84
TBPT,,0.0014,FC1*0.91
TBPT,,0.0016,FC1*0.96
TBPT,,0.0018,FC1*0.99
TBPT,,0.0020,FC1
TB,CONCR,1 !混凝土破坏参数
TBDATA,,0.5,0.95,FT1,-1

MP,EX,2,4.6E9 !石膏弹性模量
MP,PRXY,2,0.2 !泊松比
MP,DENS,2,1400
FC2=5.6E6
FT2=1.82E6
TB,MISO,2,,9
TBPT,,0.0001,0.46E6 !石膏应力应变数据
TBPT,,0.0003,1.3639E6
TBPT,,0.0006,2.7439E6
TBPT,,0.0009,4.1239E6
TBPT,,0.0012,5.5039E6
TBPT,,0.0015,FC2
TBPT,,0.0018,FC2
TBPT,,0.0021,FC2
TBPT,,0.0024,FC2
TB,CONCR,2 !石膏破坏参数
TBDATA,,0.5,0.95,FT2,-1

MP,EX,3,2.0E11 !钢筋应力应变数据
MP,PRXY,3,0.3
MP,DENS,3,7800
TB,BKIN,3
TBDATA,,350E6,2.0E9

Answer 1

你使用的材料特性出错了。你输入的应力应变曲线产生的矩阵出现奇异，不能得出有限元结果。你改用非线性的各向异性材料试一试，但要注意它们的赋值大小。或者改用各向同性材料试一下能否得出结果，如果也不能，就改变网格的疏密重新网格化。

Answer 2

，材料已经屈服，可能是加载太大了...你把荷载变小点。

Answer 3

我找到原因了，这是因为你的混凝土本构关系给的范围小了，你在TBPT,,0.0020,FC1命令的后面再加上一行，tbpt,,0.0200,fc1,与君共勉！！！