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3d4d47294f
New 746-line test file implementing 6-field THM-ECD system: - Tests 6-field system: Temperature, Displacement, Pore pressure, Electric potential, Chemical concentration, Damage (NEW) - Implements complete physics with 30 off-diagonal coupling blocks - Tests damage-enhanced properties: thermal conductivity κ(d), permeability k(d), diffusion D(d), reduced conductivity σ_e(d) - Tests damage-degraded stiffness: σ = (1-d)·C:ε - Implements damage evolution: mechanical, thermal, chemical, pressure, and electric field damage - Validates elastic energy driving force: Y = ½ε:(C:ε) - Tests all damage coupling mechanisms for hydraulic fracturing, stress corrosion cracking, concrete spalling, shale gas Ultimate hexa-physics demonstration with damage mechanics for complete failure analysis in complex multi-physics systems.