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2018 | OriginalPaper | Chapter

5. Elastic-Plastic Fracture Mechanics

Author : Wolfgang Brocks

Published in: Plasticity and Fracture

Publisher: Springer International Publishing

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Abstract

Deformation theory of plasticity is applied to generalise fracture mechanics concepts to nonlinear material behaviour. Special emphasis is put on the J-integral as energy release rate and crack-tip intensity parameter in perfect analogy to linear-elastic fracture mechanics. Its definition as path independent integral and calculation from experimental records is addressed. Requirements, extensions, applications, validity and limitations of J as “crack driving force” are discussed, in particular its application to ductile crack extension. The asymptotic J-dominated stress and strain fields at the crack tip are derived. Alternative fracture parameters like dissipation rate, crack-tip opening displacement (CTOD) and angle (CTOA) are introduced and procedures for structural integrity assessment based on these parameters are briefly introduced.

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previous chapter Extension of LEFM for Small-Scale Yielding
next chapter Solutions for Fully Plastic Conditions
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Metadata
Title
Elastic-Plastic Fracture Mechanics
Author
Wolfgang Brocks
Copyright Year
2018
Book
Plasticity and Fracture

Print ISBN: 978-3-319-62751-9

Electronic ISBN: 978-3-319-62752-6

Copyright Year: 2018

DOI
https://doi.org/10.1007/978-3-319-62752-6_5

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