Using Spiral Notch Torsion Test to Evaluate Fracture Toughness of Structural Materials and Polymeric Composites

Conference · Tue Jan 01 04:00:00 EST 2013

OSTI ID:1090472

Wang, Jy-An John ^[1]; Tan, Ting ^[1]

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1. ORNL

Spiral Notch Torsion 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 pitch. The KIC values and the associated energy release rate are obtained with the aid of a three-dimensional finite-element evaluation. The SNTT method is uniquely suitable for testing a wide variety of structural materials, including others such as ceramics, graphite, concrete, polymeric composites, and for bi-material interface fracture toughness evaluation. The SNTT test results for these structural materials and polymeric composite are demonstrated in this paper. These results demonstrated that SNTT has great potential in structural materials and polymeric composites testing, which can provide useful information for design and fabrication of structural components.

• Research Organization: Oak Ridge National Laboratory (ORNL); High Temperature Materials Laboratory
• Sponsoring Organization: ME USDOE - Office of Management, Budget, and Evaluation; ORNL work for others; EE USDOE - Office of Energy Efficiency and Renewable Energy (EE)
• DOE Contract Number: AC05-00OR22725
• OSTI ID: 1090472
• Country of Publication: United States
• Language: English

Related Subjects

SNTT
composite
fracture toughness
size effect