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| A New Method to Calculate Stress Intensity Factor for Parallel Double Cracks |
| CHEN Jing-Jie-a, HUANG Yi-a, WU Zhi-Min-b |
| (a. School of Naval Architecture; b. School of Civil Engineering, Dalian University of Technology, Dalian 116024, China) |
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Abstract In order to obtain simply stress intensity factors (SIFs) of multi cracks, a new method was proposed to calculate SIFs of parallel double cracks based on maximum crack opening displacement (MCOD) for the double parallel cracked plate subject to uniform tension loads. On the basis of the obtained relationship between the SIFs and the MCOD in the single cracked model, the influences of crack spacing ratios (vertical and longitudinal) and crack lengths ratios were considered, and the function expressions between modified coefficients and vertical spacing ratios were fitted in the different crack lengths ratios conditions when longitudinal spacing ratios is zero. And then, the influences of crack longitudinal spacing ratios on SIFs of parallel double cracks were studied. Finally, an easy way to calculate the SIF of parallel double cracks was presented.
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Received: 06 August 2011
Published: 31 August 2012
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