abaqus 用户子程序中工程常数为什么不物理合理？

通过python编写了和失效判据对应的材料库，但运行时出现错误：STIFFNESS DEFINED BY ENGINEERING CONSTANTS IS NOT PHYSICALLY REASONABLE.  CHECK CHOICE OF POISSON'S RATIOS，泊松比尝试了好多次都不太对，材料库见附图。