GpCF Geometric Pattern-Contact-Friction GpCF de "Javier Isidro Alonso Céspedes"
The acronym **PgCF** (*Geometric Pattern - Contact - Friction*) represents a specialized conceptual framework within mechanical engineering and structural analysis. Developed through the research of **Javier Isidro Alonso Céspedes**, this methodological approach aims to bridge the gap between pure geometry and practical contact mechanics. This theory is fundamental to understanding how ancient structures, fine stone masonry, or dry-stack architecture achieve absolute stability without the need for mortar or chemical binders—relying exclusively on geometric interlocking, effective contact area, and frictional forces. Below is the dynamic interaction of these three fundamental pillars: ### 1. Geometric Pattern (Pg) The "Geometric Pattern" is the master design; it defines the profiles, cutting angles, and spatial distribution of the surfaces that will interact. * **Slopes and Resistance Angles:** In classical mechanics and stereotomy (the art of stone cutting), geometric angles...