Multiaxial Loading Fracture of Al2O3Tubes: I, Experiments
作者:
M.G. STOUT,
J.J. PETROVIC,
期刊:
Journal of the American Ceramic Society
(WILEY Available online 1984)
卷期:
Volume 67,
issue 1
页码: 14-18
ISSN:0002-7820
年代: 1984
DOI:10.1111/j.1151-2916.1984.tb19138.x
出版商: Blackwell Publishing Ltd
数据来源: WILEY
摘要:
Alumina thin‐walled tubes were fractured in axial tension, hoop tension, balanced biaxial tension, balanced tension‐compression, and pure torsion using an electrohydraulic mechanical testing apparatus. A slight anisotropy in the axial and hoop uniaxial strengths indicated that the predominant defects were axially oriented, and probably fabrication‐related as opposed to machining flaws. A 10% weakening was observed in balanced biaxial tension as compared to uniaxial tension, whereas strength was insensitive to a balanced tension‐compression stress state. The strength in pure torsion was 16% higher than the axial strength. Stress state results suggest a weakening due to in‐flaw plane tensile stresses and more complex fracture‐initiation phenomena for stresses not oriented perpendicular to the domin
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