Actions for J-integral patch for finite element analysis of dynamic fracture due to impact of pressure vessels

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J-integral patch for finite element analysis of dynamic fracture due to impact of pressure vessels

Author
Kunin, Boris I.
Published
Nov 1, 1993.
Physical Description
1 electronic document
Online Version

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Unclassified, Unlimited, Publicly available.
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Summary
Prediction of whether a pressurized cylinder will fail catastrophically when impacted by a projectile has important applications ranging from perforation of an airplane's skin by a failed turbine blade to meteorite impact of a space station habitation module. This report summarizes the accomplishment of one task for a project whose aim is to simulate numerically the outcome of a high velocity impact of pressure vessels. A finite element patch covering the vicinity of a growing crack has been constructed to estimate the J-integral (crack driving force) during the impact. Explicit expressions for the J-integral through the nodal values of displacement, strain, and stress have been written. The patch is to be used repeatedly to estimate the amount of crack growth during the time of the impact. The resulting crack size is to be compared to an estimated critical crack size for the pressurized cylinder.
Other Subject(s)
Collection
NASA Technical Reports Server (NTRS) Collection.
Note
Document ID: 19940019956.
Accession ID: 94N24429.
The 1993 NASA(ASEE Summer Faculty Fellowship Program; 5 p.
Terms of Use and Reproduction
No Copyright.
View MARC record | catkey: 15660336