An Innovative Technique for Evaluating Fracture Toughness of Graphite Materials

Conference · Mon Dec 31 23:00:00 EST 2007

OSTI ID:940788

Wang, Jy-An John ^[1]; Liu, Ken C ^[1]

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1. ORNL

Spiral Notch Torsion Fracture Toughness Test (SNTT) was developed recently to measure the intrinsic fracture toughness (KIC) of structural materials. The SNTT system operates by applying pure torsion to uniform cylindrical specimens with a notch line that spirals around the specimen at a 45 a pitch. The KIC values are obtained with the aid of a three-dimensional finite-element computer code, TOR3D-KIC. The SNTT method is uniquely suitable for testing a wide variety of materials used extensively in pressure vessel and piping structural components and weldments, including others such as ceramics, their composites, graphite and concrete.

• Research Organization: Oak Ridge National Laboratory (ORNL); High Temperature Materials Laboratory
• Sponsoring Organization: ORNL LDRD Seed-Money
• DOE Contract Number: AC05-00OR22725
• OSTI ID: 940788
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
FINITE ELEMENT METHOD
FRACTURE PROPERTIES
GRAPHITE
MATERIALS TESTING
MEASURING METHODS
T CODES