Minimum fatigue pre-crack extension for fracture testing
conference paper
The minimum pre-crack necessary to achieve an accurate measurement of the J-integral is examined with the use of elastic-plastic finite element analysis. This minimum pre-crack is shorter than what is specified in fracture codes ASTM E1820 and BS 7448. A variety of steel properties are considered, but the focus is on S690 grade steel. Testing a SENB specimen from S690 steel with a notch width of 0.5 mm and a minimum pre-crack length of 0.5 mm can result in the same J integral as the same specimen with a much longer pre-crack. Finally, it is shown that a surface pre-crack length of 0.5 is practically achievable.
TNO Identifier
477123
Source title
Proceedings of the ASME 2013 Pressure Vessels & Piping Division Conference PVP2013, June 14-18, 2013, Paris, France
Pages
1-8
Files
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