In this work, an atomistic-based finite temperature multiscale interphase finite element method has been developed, and it has been applied to study fracture process of metallic materials at finite temperature. The coupled thermomechanical finite element formulation is derived based on continuum thermodynamics principles. The mesoscale constitutive relations and thermal conduction properties of materials are enriched by atomistic information of the underneath lattice microstructure in both bulk elements and interphase cohesive zone. This is accomplished by employing the Cauchy–Born rule, harmonic approximation, and colloidal crystal approximation. A main advantage of the proposed approach is its ability to capture the thermal conduction inside the material interface. The multiscale finite element procedure is performed to simulate an engineering nickel plate specimen with weak interfaces under uni-axial stretch. The simulation results indicate that the crack propagation is slowed down by thermal expansion, and a cooling region is found in the front of crack tip. These phenomena agree with related experimental results. The effect of different loading rates on fracture is also investigated.
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July 2012
Research Papers
A Finite Temperature Multiscale Interphase Zone Model and Simulations of Fracture
Lisheng Liu,
Lisheng Liu
Department of Civil and Environmental Engineering,
The University of California
, Berkeley, CA 94720;Department of Engineering Structure and Mechanics, Wuhan University of Technology
, Wuhan, 430070, P.R. China
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Shaofan Li
Shaofan Li
Department of Civil and Environmental Engineering,
e-mail: shaofan@berkeley.edu
The University of California
, Berkeley, CA 94720
Search for other works by this author on:
Lisheng Liu
Department of Civil and Environmental Engineering,
The University of California
, Berkeley, CA 94720;Department of Engineering Structure and Mechanics, Wuhan University of Technology
, Wuhan, 430070, P.R. China
Shaofan Li
Department of Civil and Environmental Engineering,
The University of California
, Berkeley, CA 94720e-mail: shaofan@berkeley.edu
J. Eng. Mater. Technol. Jul 2012, 134(3): 031014 (12 pages)
Published Online: June 11, 2012
Article history
Received:
September 30, 2011
Revised:
February 28, 2012
Online:
June 11, 2012
Published:
June 11, 2012
Citation
Liu, L., and Li, S. (June 11, 2012). "A Finite Temperature Multiscale Interphase Zone Model and Simulations of Fracture." ASME. J. Eng. Mater. Technol. July 2012; 134(3): 031014. https://doi.org/10.1115/1.4006583
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