Cohesive Zone Models (CZMs) are being increasingly used to simulate fracture and fragmentation processes in metallic, polymeric, and ceramic materials and their composites. Instead of an infinitely sharp crack envisaged in fracture mechanics, CZM presupposes the presence of a fracture process zone where the energy is transferred from external work both in the forward and the wake regions of the propagating crack. In this paper, we examine how the external work flows as recoverable elastic strain energy, inelastic strain energy, and cohesive energy, the latter encompassing the work of fracture and other energy consuming mechanisms within the fracture process zone. It is clearly shown that the plastic energy in the material surrounding the crack is not accounted in the cohesive energy. Thus cohesive zone energy encompasses all the inelastic energy e.g., energy required for grainbridging, cavitation, internal sliding, surface energy but excludes any form of inelastic strain energy in the bounding material.
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October 2002
Technical Papers
Analysis of Energy Balance When Using Cohesive Zone Models to Simulate Fracture Processes
C. Shet,
C. Shet
Department of Mechanical Engineering, FAMU-FSU College of Engineering, Florida State University, Tallahassee, FL 32312
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N. Chandra, Fellow ASME
N. Chandra, Fellow ASME
Department of Mechanical Engineering, FAMU-FSU College of Engineering, Florida State University, Tallahassee, FL 32312
Search for other works by this author on:
C. Shet
Department of Mechanical Engineering, FAMU-FSU College of Engineering, Florida State University, Tallahassee, FL 32312
N. Chandra, Fellow ASME
Department of Mechanical Engineering, FAMU-FSU College of Engineering, Florida State University, Tallahassee, FL 32312
Contributed by the Materials Division for publication in the JOURNAL OF ENGINEERING MATERIALS AND TECHNOLOGY. Manuscript received by the Materials Division June 5, 2001; revised manuscript received February 6, 2002. Associate Editor: M. Zhou.
J. Eng. Mater. Technol. Oct 2002, 124(4): 440-450 (11 pages)
Published Online: September 30, 2002
Article history
Received:
June 5, 2001
Revised:
February 6, 2002
Online:
September 30, 2002
Citation
Shet , C., and Chandra , N. (September 30, 2002). "Analysis of Energy Balance When Using Cohesive Zone Models to Simulate Fracture Processes ." ASME. J. Eng. Mater. Technol. October 2002; 124(4): 440–450. https://doi.org/10.1115/1.1494093
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