Susceptibility-Tension Coupling

Susceptibility-Tension Coupling is the ATH equation describing how a material's susceptibility (its vulnerability amplification relative to a zero-tension baseline) couples with interface tension escalation and subsystem entanglement to determine how strongly a disturbance propagates across architectural boundaries. It captures the cascade effect — a local failure at a vulnerable, highly-tensioned interface spreading into the wider fabric — and, combined with variance-amplified hazard, predicts not just whether a surface will fail but how far that failure will travel.