On the stress singularity at the interfacial crack tip -- An experimental study

Conference · Fri Dec 30 23:00:00 EST 1994

OSTI ID:89886

Yan, X; Wang, Q; Chiang, F P ^[1]

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1. State Univ. of New York, Stony Brook, NY (United States). Dept. of Mechanical Engineering

Bimaterial beams, with an interfacial crack, are tested under different loads and mode mixity. A new technique SIEM (speckle interferometry with electron microscopy), was used to measure the displacement field at different scales. Experimental results show that there exist a weak singularity within the K-dominant zone, for different load levels and different mode mixity. These observation indicated that stress oscillation in very near crack tip is not an important issue at all, because the Williams asymptotic solution does not hold in that region.

• OSTI ID: 89886
• Report Number(s): CONF-9409291--; ISBN 1-56676-220-0
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
COMPOSITE MATERIALS
CRACKS
EPOXIDES
FRACTURE MECHANICS
INTERFACES
INTERFEROMETRY
MATHEMATICAL MODELS
SAMPLE PREPARATION
SCANNING ELECTRON MICROSCOPY
STRESS ANALYSIS