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This chapter describes the fundamentals of structural fracture mechanics, with the eventual aim of application to ductile structures. It describes the concept and applications of the stress intensity factor as a representative parameter in linear elastic fracture mechanics (LEFM), and considers modes of crack extension other than mode I. In the LEFM approach, it has been recognized that the fatigue crack growth rate can be related to the cyclic elastic stress field at the tip of a long crack subjected to low to intermediate levels of cyclic stress. However, consistent application of the procedure to a real structure necessitates elastic‐plastic fracture mechanics (EPFM) analysis to model crack tip behavior, for which special‐purpose finite elements may be used. Elastic buckling of a simply supported plate under uniaxial compressive loads is considered when the plate has vertical edge crack or horizontal edge crack.
This chapter describes the fundamentals of structural fracture mechanics, with the eventual aim of application to ductile structures. It describes the concept and applications of the stress intensity factor as a representative parameter in linear elastic fracture mechanics (LEFM), and considers modes of crack extension other than mode I. In the LEFM approach, it has been recognized that the fatigue crack growth rate can be related to the cyclic elastic stress field at the tip of a long crack subjected to low to intermediate levels of cyclic stress. However, consistent application of the procedure to a real structure necessitates elastic‐plastic fracture mechanics (EPFM) analysis to model crack tip behavior, for which special‐purpose finite elements may be used. Elastic buckling of a simply supported plate under uniaxial compressive loads is considered when the plate has vertical edge crack or horizontal edge crack.
Structural Fracture Mechanics
Paik, Jeom Kee (author)
2018-03-28
50 pages
Article/Chapter (Book)
Electronic Resource
English
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