Journal Published Online: 01 September 1996
Volume 24, Issue 5

A Fracture Test Method for Mode I Fracture Of Thin Metal Materials



A method of testing Mode I K dominated fractures in thin materials using a constrained short center notched tension specimen that is clamped along the loaded edge is described. Poisson's effect induces a lateral tension on the specimen that eliminates the buckling problems associated with thin materials. Furthermore, the stress intensity factor over a significant range of crack lengths and specimen geometries is dependent only on the nominal strain, making the test very suitable for crack-growth experiments under a constant-stress intensity factor. A very accurate approximate expression for the stress intensity factor is presented. A test using this method to measure the crack-growth resistance of Kapton 300HN polyimide film is described.

Author Information

Cotterell, B
School of Mechanical and Production Engineering, Nanyang Technological University, Singapore
Sim, MC
Matcor Technology & Services Pte. Ltd., Singapore
Amrutharaj, G
National University of Singapore, Singapore
Teoh, SH
National University of Singapore, Singapore
Pages: 4
Price: $25.00
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Stock #: JTE11309J
ISSN: 0090-3973
DOI: 10.1520/JTE11309J