Phased Ultrasonic Modulation of Friction and Stiffness in Geomaterials: Toward Reversible, Coherence-Driven Resistance Control

This item contains a methods-focused manuscript proposing and defining bench-scale experiments to test whether phased ultrasonic excitation, combined with static load and geometric resonance, can induce reversible modulation of friction and elastic response in geomaterials such as granite and limestone.The work emphasizes diagnostic clarity, detuned null controls, and reversibility criteria rather than performance optimization. No experimental data are included at this stage. The manuscript is intended to support independent replication, critical evaluation, and subsequent experimental validation.