Edge of Practice — Extended Cycle

Experiments that earned time

Extended Cycle experiments are promoted from Edge of Practice (Short-Cycle) after surviving initial falsification. These experiments do not ask new questions—they test whether the same assumptions fail under repetition, fatigue, or environmental cycling.

Entry into this index is gated. An experiment must demonstrate that rapid failure modes have been ruled out and that time itself is now the dominant variable.

Qualification Criteria

• Short-cycle failure conditions explicitly passed
• New failure modes require repetition or duration
• No chemistry, coatings, or proprietary tools introduced
• Still binary: pass or fail

Extended Cycle Candidates

• Fatigue Energy Dissipation in PP via Untreated CaCO₃
  Crack deflection and delayed fatigue failure under cyclic loading
• Wear Stability in HDPE via Untreated Talc
  Long-horizon tribological behavior driven by particle orientation
• Thermal Cycling Stability in PC with Short Glass Fiber
  Micro-slip stress dissipation under repeated thermal shock
• Optical Stability in PMMA via Untreated Silica
  Haze resistance under humidity and thermal cycling
• Moisture Cycling Stability in Nylon 6 via Graphite
  Dimensional and modulus stability under wet–dry cycling

Governance

Extended Cycle experiments remain falsification-first. Survival does not imply usefulness, safety, or permanence—only that time has not yet broken the assumption.

Promotion to Persistence requires explicit documentation of extended survival and identification of slow, irreversible failure modes.