Numerical Analysis of Stress Intensity Factors in Three-Dimensional Functionally Graded Materials

Journal Article · Fri Feb 15 04:00:00 EST 2008 · AIP Conference Proceedings

DOI:https://doi.org/10.1063/1.2896761· OSTI ID:21055238

Licheng, Guo; Linzhi, Wu; Hongjun, Yu ^[1]

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1. Center for Composite Materials, Harbin Institute of Technology, Harbin 150001 (China)

In this paper, a finite element method based on nonhomogeneous elements is used to study crack problems in three-dimensional (3D) functionally graded materials (FGMs). Since the actual material properties at each integral point are employed in the integration during formation of the element stiffness matrix, each element can have nonhomogeneous material properties. By this method, the number of elements is reduced and the meshing effort for the structure is simplified. Therefore, the modeling process for numerical simulation of fracture behavior in 3D FGMs is greatly simplified. The crack front characteristics of Mode-I edge penetrable crack in 3D FGM specimens are studied under uniform tension loading. The influence of material nonhomogeneity constant and geometric parameters on the stress intensity factors (SIFs) of the 3D FGM specimens are investigated.

• OSTI ID: 21055238
• Journal Information: AIP Conference Proceedings, Journal Name: AIP Conference Proceedings Journal Issue: 1 Vol. 973; ISSN APCPCS; ISSN 0094-243X
• Country of Publication: United States
• Language: English

Related Subjects

71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
COMPUTERIZED SIMULATION
CRACKING
CRACKS
FINITE ELEMENT METHOD
FLEXIBILITY
FRACTURE MECHANICS
FRACTURES
LOADING
MATRICES
NUMERICAL ANALYSIS
STRESS INTENSITY FACTORS
STRESSES
TESTING
THERMAL ANALYSIS
THREE-DIMENSIONAL CALCULATIONS