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	Meccanica della Frattura di Griffith	Analisi Modale
Campo	Produzione industriale	Produzione industriale
Famiglia	Process / pipeline	Process / pipeline
Anno di origine	1921	1975
Ideatore	Alan A. Griffith	Clough, R. W., Penzien, J.
Tipo	Theoretical model for brittle fracture and crack propagation	Computational method for structural dynamics
Fonte seminale	Griffith, A. A. (1921). The phenomena of rupture and flow in solids. Philosophical Transactions of the Royal Society A, 221, 163-198.	Clough, R. W., & Penzien, J. (1975). Dynamics of Structures. McGraw-Hill. ISBN: 0-07-011394-7
Alias	Brittle fracture theory, Energy release rate, Linear elastic fracture mechanics	Eigenvalue analysis, Frequency response analysis, Natural frequencies
Correlati	4	4
Sintesi	Griffith's theory of brittle fracture explains how small flaws or cracks in materials grow unstably, leading to sudden catastrophic failure. Formulated by Alan A. Griffith in 1921 through experiments on glass fibers, this theory balances the elastic energy released by crack growth against the surface energy required to create new material surfaces. It predicts that materials fail at stresses far below their theoretical strength due to the stress concentration around pre-existing flaws.	Modal analysis is a computational and experimental method for determining the natural frequencies and associated mode shapes of a mechanical structure. By decomposing structural vibration into its fundamental modes (natural oscillation patterns), engineers can predict resonance frequencies, assess dynamic response to external forces, and design structures to avoid problematic vibrations. Developed rigorously by Clough and Penzien in their foundational work on structural dynamics, modal analysis is essential for designing robust mechanical systems.