图  1  剪切带脱离体及受力示意图及坐标系选取

Figure  1.  Schematic diagram for the shear band with applied forces and coordinates

图  2  平面应变条件下Cosserat介质质点自由度

Figure  2.  Degrees of freedom of a Cosserat continuum particle in the plane strain condition

图  3  剪切带厚度因子ξ_d/2对参数r₀的依赖关系

Figure  3.  Shear band thickness factor ξ_d/2 vs. parameter r₀

图  4  对应r₀设定值参数β的先验和后验值

Figure  4.  Priori and posteriori values of β vs. parameter r₀

图  5  半带厚内y(ξ)和z(ξ)

Figure  5.  Variations of y(ξ)and z(ξ)in the half shear band

图  6  半带厚内$\hat{\theta}(\xi), \hat{\theta}^{\prime}(\xi)$和$\hat{R}(\xi)$

Figure  6.  Variations of $\hat{\theta}(\xi), \hat{\theta}^{\prime}(\xi)$ and z(ξ) in the half shear band

图  7  剪切带内正则化应力、偶应力分布

Figure  7.  Distributions of the normalized stress and the couple stress components in the shear band

图  8  剪切带内正则化应变率、微曲率率和剪切速率分布

注   为了解释图中的颜色，读者可以参考本文的电子网页版本.

Figure  8.  Distributions of the normalized strain rate, the micro-curvature rate and the shear velocity in the shear band