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TECHNICAL PAPERS

Analysis of Energy Balance When Using Cohesive Zone Models to Simulate Fracture Processes

[+] Author and Article Information
C. Shet, N. Chandra

Department of Mechanical Engineering, FAMU-FSU College of Engineering, Florida State University, Tallahassee, FL 32312

J. Eng. Mater. Technol. 124(4), 440-450 (Sep 30, 2002) (11 pages) doi:10.1115/1.1494093 History: Received June 05, 2001; Revised February 06, 2002; Online September 30, 2002
Copyright © 2002 by ASME
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References

Figures

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A typical cohesive traction-displacement curve
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Embedded cohesive process zone
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Energy dissipating micromechanisms in the wake and forward regions
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Conceptual frame work of cohesive zone model
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(a) Double-edge notched plate, (b) geometry and boundary/loading conditions used in FEA model
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(a) Finite element mesh model of quarter portion of double edge notched plate (b) fine mesh near the crack tip
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Variation of plastic work with cohesive energy for different σmaxy ratio
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A line of patch of elements along the line of crack propagation
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The variation of cohesive energy in the wake and forward region as the crack propagates. The numbers indicate the cohesive element patch numbers adjoining the patches of binding elements.
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Variation of elastic energy in various patch of elements as a function of crack extension. The numbers indicate patch numbers starting from initial crack tip.
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Variation of dissipated plastic energy in various patches as a function of crack extension. The numbers indicate patch numbers starting from initial crack tip.
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Schematic of crack initiation and propagation process in a ductile material
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Contour plot of yield locus zone around the cohesive crack tip at the various stages of crack growth
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Variation of plastic dissipation and elastic work in various patch of elements along the interface for the case of σmaxy=1.5. The numbers indicate the energy in various patch of elements starting from the crack tip.

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