Elementary engineering fracture mechanics
When asked to start teaching a course on engineering fracture mechanics, I realized that a concise textbook, giving a general oversight of the field, did not exist. The explanation is undoubtedly that the subject is still in a stage of early development, and that the methodologies have still a very limited applicability. It is not possible to give rules for general application of fracture mechanics concepts. Yet our comprehension of cracking and fracture beha viour of materials and structures is steadily increasing. Further developments may be expected in the not too distant future, enabling useful prediction of fracture safety and fracture characteristics on the basis of advanced fracture mechanics procedures. The user of such advanced procedures m\lst have a general understanding of the elementary concepts, which are provided by this volume. Emphasis was placed on the practical application of fracture mechanics, but it was aimed to treat the subject in a way that may interest both metallurgists and engineers. For the latter, some general knowledge of fracture mechanisms and fracture criteria is indispensable for an apprecia tion of the limita tions of fracture mechanics. Therefore a general discussion is provided on fracture mechanisms, fracture criteria, and other metal lurgical aspects, without going into much detail. Numerous references are provided to enable a more detailed study of these subjects which are still in a stage of speculative treatment.
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The elastic cracktip stress field
Dynamics and crack arrest
Plane strain fracture toughness
Failsafety and damage tolerance
Fracture of structures
Stiffened sheet structures
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Aerospace Inst aluminium alloy amplitude analysis application ASTM STP behaviour brittle Broek calculated chapter cleavage constant crack arrest crack extension crack length crack resistance crack speed crack tip critical crack CTOD curve cycle depends determined discussed ductile ductile fracture effect elastic energy electron energy release rate engineering equations failure fatigue crack growth fatigue crack propagation finite element finite element analysis follows Fract fracture mechanics fracture toughness function growth rate high toughness increase initial integration kinetic energy Kmax linear elastic load measurement Mech method notch occur particles plane strain plane stress plastic deformation plastic zone correction plate prediction pressure vessels Rept residual strength retardation shear shear stress sheet shown in figure small cracks solution specimen steel stiffened panel stress field stress intensity factor striations stringer structures surface flaw tensile thickness unstiffened yield strength yield stress zero