Determining Extent of Singular-Dominant Region for Interface Cracks Using Deoscillatory Displacement Jumps
Publication: Journal of Engineering Mechanics
Volume 145, Issue 10
Abstract
Because of oscillatory asymptotic mechanical behavior, it is difficult to properly examine the extent of the near-front singular-dominant region for interface cracks. An approach is proposed for generating a near-front “deoscillatory displacement jump” (DDJ) field led by a pure square-root-dominant (i.e., -dominant) term. In the DDJ approach, the real and the imaginary parts of the complex expressions for near-front displacement discontinuities are decoupled, so oscillatory asymptotic behavior does not explicitly appear in the formulation. This enables direct incorporation of finite-element solutions for proper examination of the extent of the singular-dominant region and the accuracy of near-front numerical solutions.
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Acknowledgments
This work has been partially supported by Ministry of Science and Technology Grant No. MOST 106-2221-E-008-028 to National Central University.
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Published In
Journal of Engineering Mechanics
Volume 145 • Issue 10 • October 2019
Copyright
©2019 American Society of Civil Engineers.
History
Received: Apr 1, 2018
Accepted: Feb 11, 2019
Published online: Jul 19, 2019
Published in print: Oct 1, 2019
Discussion open until: Dec 19, 2019
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