ElastoSure Checked Against Independent Isothermal Aging Data (70°C / 30% RH) for a Structural Polyurethane Adhesive

An independent, in-review study held a moisture-curing 1K-PU structural adhesive at a constant 70°C / 30% RH for up to 14 days, measuring six mechanical properties plus glass transition temperature. ElastoSure's fit/extrapolate/validate workflow was run: fit on the unaged and 1-week points, checked against the held-out 2-week measurement.

Karax's primary benchmark is the full predicted-vs-actual stress-strain curve, not a single number reconstructed from scalar data, not a literal digitized trace. That curve shows yield stress rising 86% while post-yield energy dissipation, capacity to absorb energy after yielding, falls 58% over 14 days, and glass transition temperature drops 11.2°C. A strength-only test program would miss the ductility loss entirely.

The source study reports only three time points, so this rests on a single held-out point per property, not enough for a rigorous accuracy claim. Both ElastoSure and a simple linear baseline overshot how much the material actually embrittled by day 14; the white paper reports that limitation directly.