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Title: Stress investigation on crack tip plastic zone - part II: sub-interface crack and crack in layered materials
Authors: Poh, Xuan You.
Keywords: DRNTU::Engineering::Materials::Composite materials
Issue Date: 2011
Abstract: Elastic-plastic stress analysis has been carried out for the value of J Integral of a sub-interface crack with small scale yielding. In the study, the shape of plastic zone is assumed as a long, slim strip at both crack tips. In the plastic zone, both normal stress and yield stress exist and are considered, due to the bi-material interface. The values of plastic zone size, normal stress and shear stress are pre-determined by satisfying the conditions that both Mode I and Mode II stress intensity factors vanish and the Von Mises yield criterion is met. The value of J Integral is obtained by finding the average value when the loading is fully applied. Lastly, the effect of loading, crack depth (distance to interface), crack length and the thickness of the top layer are being discussed.
Schools: School of Mechanical and Aerospace Engineering 
Rights: Nanyang Technological University
Fulltext Permission: restricted
Fulltext Availability: With Fulltext
Appears in Collections:MAE Student Reports (FYP/IA/PA/PI)

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