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AN APPLICATION OF SPI TECHNIQUE FOR STUDING STRAIN DISTRIBUTION AT CF CRACK TIP |
ZHOU Xiangyang;LI Jin;LIU Guanglei;KE Wei Corrosion Science Laboratory; Academia Sinica; Institute of Corrosion and Protection of Metals; Academic Sinica; ShenyangWEI Xuejun;Institute of Corrosion and Protection of Metals Academia Sinica Shenyang110015 |
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Cite this article:
ZHOU Xiangyang;LI Jin;LIU Guanglei;KE Wei Corrosion Science Laboratory; Academia Sinica; Institute of Corrosion and Protection of Metals; Academic Sinica; ShenyangWEI Xuejun;Institute of Corrosion and Protection of Metals Academia Sinica Shenyang110015. AN APPLICATION OF SPI TECHNIQUE FOR STUDING STRAIN DISTRIBUTION AT CF CRACK TIP. Acta Metall Sin, 1993, 29(6): 77-81.
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Abstract A computerized digital speckle-interferometry(SPI) system has been set up todetermine the in-plane distribution of displacement and strain at crack tip of CF specimens.The effect of corrosion factors on plastic deformation at crack tip in CF process has been ex-amined by comparing the near-tip strain fields of steel A537 before and after hydrogen char-ging, and of pure Cu before and after applying an anodic current in 3.5% NaCl. The resultsshowed that the clasic finite element mathematical models were not suitable to describe thenear-tip deforamtion under the experimental conditions. Hydrogen charging made the cracktip plasticity decreased for steel A537 and the anodic dissolution enhanced the near-tipdeformation of pure Cu specimen.
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Received: 18 June 1993
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