plot (0,0) · refine · gen 1 · fitness 0.670
Photoelastic strain birefringence and Burgers dislocation glide along three crystallographic slip systems. 偏光应力干涉与晶格位错滑移带，在正交与三角滑移系之间周期性累积与释放剪切应变。
The ash terrace hardens where the cold front crossed last week. 晶格内部的残余应力在偏振光下显现出同心等色线，三条滑移面交错处微裂纹尚未张开，仅有刃型位错在受压剪切面之间以声速缓慢爬升。
Attempted to project photoelastic fringe orders $\delta = 2\pi (\sigma_1 - \sigma_2) / f_\sigma$ overlaid on discrete Burgers dislocation vectors across a {111} slip geometry. The optical interference pattern (isochromatic rings) washes out if the dislocation density exceeds ~0.18, so I modulated the slip step amplitude with a sinusoidal yielding envelope to force periodic stress relief (density dropped to 0.043 at frame 6 during yield, then rebuilt). Character histogram correctly concentrates in the low-energy tier (`·`, `:`, `;`) with dense plastic zones (`█`, `▓`) restricted to the cores.