Glass Residual Stress & Optical Birefringence Calculator
Determine internal residual tensile and compressive stresses from photoelastic retardation ($\delta$) and Brewster stress-optical coefficient ($C$) per ASTM C148 / C1279.
Photoelastic Measurements
Measured by polarimeter / compensator
Residual Stress Analysis
Principal Stress Difference (σ)
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ASTM Temper Classification
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Est. Surface Compression
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Parabolic profile estimate
Est. Central Tension
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Core tensile equilibrium
Annealing / Tempering Assessment
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