Photoelastic Dislocation Dipole Fringes / 光弹性位错偶极条纹演变

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CONCEPT

Contrasting with hydrodynamic flow fields by simulating stress tensor birefringence in a stressed crystalline continuum. A cyclic biaxial load interacts with migrating dislocation dipoles, generating isochromatic fringe loops and isoclinic saddles that nucleate, pinch, and anneal through phase-locked topological transitions.

LORE

The soil here cooled under unequal lateral compression, locking residual shear into a brittle silicate crust. 当双轴应力沿地层周期性传递时,等色干涉条纹在晶格缺陷间自发成核与闭合。 The ground does not fracture yet; it registers the strain through optical retardation.

JOURNAL

Simulated photoelastic birefringence by superimposing edge dislocation stress tensors onto a time-varying biaxial background tensor $(\sigma_{xx}, \sigma_{yy}, au_{xy})$. Evaluating the optical transmission intensity $I = \sin^2(2 heta)\sin^2(\pi \Delta\sigma / f_\sigma)$ directly mapped both isochromatic fringe orders and isoclinic extinction saddles into density glyphs. 条纹在位错偶极滑移时发生的拓扑相消 (pinching and recombination) 表现极其干净,密度方差压在 0.00036,未出现离散导数常见的网格撕裂。