Influence of extreme velocities on dynamic cavity expansion
Name
1003324543-MIT.pdf
Description
Full printable version
Size
3.17 MB
Format
Adobe PDF
Checksum (MD5)
eb0703896d77d4a1bfbaa8594d58ec37
Author(s)
Wittels, Kelsey Lynn
Advisor(s)
Tal Cohen.
Date Issued
2017
Publisher
Massachusetts Institute of Technology
Abstract
Cavitation can broadly be described as the unstable expansion of an empty void in a body, usually occurring when loads on the body reach a critical level. In this thesis, dynamic cavity expansion (DCE) in solids is of particular interest. Cavity expansion has been studied extensively under quasi-static and dynamic loading conditions. However, the behavior of cavitation fields with extreme dynamic expansion velocities have little been studied, especially in materials without a definite yield point. In this thesis, DCE in a hardening elastoplastic medium is considered under extreme velocities. Two nonlinear differential equations are used to describe the steady-state expansion. Using numerical integration, this system is solved to explore the behavior under extreme expansion velocities. By gradually increasing the expansion velocities, we find that a singularity occurs in the governing system, indicating a shock wave emerging and propagating through the material. With this limit velocity of the material known, further characteristics of the material can be described and investigated.
Description
Thesis: M. Eng., Massachusetts Institute of Technology, Department of Civil and Environmental Engineering, 2017.
Cataloged from PDF version of thesis.
Includes bibliographical references (pages 35-36).
Subjects
Civil and Environmental Engineering.
MIT Department
Massachusetts Institute of Technology. Department of Civil and Environmental Engineering
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