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Relations between structural intensity and J-integral

✍ Scribed by F. Wang; H.P. Lee; C. Lu

Publisher
Elsevier Science
Year
2005
Tongue
English
Weight
305 KB
Volume
72
Category
Article
ISSN
0013-7944

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✦ Synopsis

The present study introduces the concept of structural intensity, which can be interpreted as power flux, into fracture mechanics. It is derived theoretically that the normal component of the structural intensity along crack edge equals Jintegral. SI is the power flux or vector representation of the J-integral at the crack tip. Using the finite element method, the structural intensity can be easily calculated. The numerically calculated structural intensity is adopted to visualize the J-integral of a crack tip. Directional power flow path and magnitude at the crack tip is demonstrated schematically with the structural intensity, which facilitates convenient evaluation of the crack propagation status.

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