Defects, Fracture and Fatigue: Proceedings of the Second International Symposium, held at Mont Gabriel, Canada, May 30–June 5, 1982. Questo articolo non è disponibile.Defects, Fracture and Fatigue: Proceedings of the Second International Symposium, held at Mont Gabriel, Canada, May 30–June 5, 1982

The Second International Symposium on Defects, Fracture and Fatigue took place at Mont Gabriel, Quebec, Canada, May 30 to June 5, 1982, and was organized by the Mechanical Engineering Department of McGill University and Institute of Fracture and Solid Mechanics, Lehigh University. The Co-Chairmen of the Sympo­ sium were Professor G. C. Sih of Lehigh University and Professor J. W. Provan of McGill University. Among those who served on the Organizing Committee were G. C. Sih (Co-Chairman), J. W. Provan (Co-Chairman), H. Mughrabi, H. Zorski, R. Bullough, M. Matczynski, G. Barenblatt and G. Caglioti. As a result of the interest expressed at the First Symposium that was held in October 1980, in Po­ land, the need for a follow-up meeting to further explore the phenomena of mate­ rial damage became apparent. Among the areas considered were dislocations, per­ sistent-slip-bands, void creation, microcracking, microstructure effects, micro/ macro fracture mechanics, ductile fracture criteria, fatigue crack initiation and propagation, stress and failure analysis, deterministic and statistical crack models, and fracture control. This wide spectrum of topics attracted researchers and engineers in solid state physics, continuum mechanics, applied mathematics, metallurgy and fracture mechanics from many different countries. This spectrum is also indicative of the interdisciplinary character of material damage that must be addressed at the atomic, microscopic and macroscopic scale level.

Section I Dislocation Behavior and Influence.- Direct observations of crack tip dislocation behavior during tensile and cyclic deformation.- The behavior of dislocations and the formation of wall structures observed by in situ high voltage electron microscopy.- Dislocation dynamics in aluminum and in aluminum-based alloys investigated by TEM and NMR techniques.- The cyclic deformation of titanium: dislocation substructures and effective and internal stresses.- Fatigue softening in precipitation hardened copper-cobalt single crystals.- Section II Modeling of Dislocations and Microcracking.- The elastic strain energy of dislocation structures in fatigued metals.- Dislocation kinetics and the formation of deformation bands.- Intergranular fracture criteria and interfacial thermodynamic properties.- Statistical mechanics of early growth of fatigue cracks.- The effect of homo- and heterogeneous mechanisms coupling on microcrack nucleation in metals.- Section III Slip-Bands and Crack Initiation.- A model of high-cycle fatigue-crack initiation at grain boundaries by persistent slip bands.- Shape and structure of persistent slip bands in iron carbon alloys.- Estimation of crack initiation in plain carbon steels by thermometric methods.- Inhomogeneous work-softening during cyclic loading of SAE 4140 in different heat treated states.- Fatigue crack initiation in iron.- The cyclic response and strain life behaviour of polycrystalline copper and ?-brass.- Section IV Material Damage and Fracture.- Prediction of damage sites ahead of a moving heat source.- A pseudo-linear analysis of yielding and crack growth: strain energy density criterion.- Nonlocal mechanics of crack curving.- Motion of the crack under constant loading and at high constant temperature.- Creep cavitation and fracture due to a stress concentration in 21/4 Cr-1 Mo.- Section V Stress and Failure Analysis.- Stress intensity factors for radial cracks in bimaterial media.- Sudden twisting of partially bonded cylindrical rods.- An axisynmetric-elastodynamic analysis of a crack in orthotropic media using a path-independent integral.- Unstable growth of branched cracks.- Experimental stress intensity distributions by optical methods.- Section VI Fatigue Crack Propagation.- Analyses of microstructural and chemical effects on fatigue crack growth.- A fractographic study of corrosion-fatigue crack propagation in a duplex stainless steel.- Effects of environment on fatigue deformation of iron.- Microstructural processes prior to and during fatigue softening of structural steels.- Section VII Statistical Fracture and Fatigue.- On a predictive fatigue crack initiation reliability for large steel castings.- Reliability of structures with time dependent properties.- An experimental investigation of fatigue reliability laws.- Section VIII Fracture Testing and Control.- On cracking instability in plates containing circular holes.- Effect of inclusions on dynamic toughness of line-pipe steel.- Discontinuity sources in manufacturing processes.- A stochastic interpretation of material degradation processes.- List of Participants.