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http://dx.doi.org/10.5394/KINPR.2002.26.4.435

An Experimental Assessment of the Effects of Residual Stresses on Fracture Behavior of the Plate  

Jang, Chang-Doo (Department of Naval Architecture and Ocean Engineering, Seoul National University)
Park, Yong-Kwan (Hyundai Heavy Industries)
Song, Ha-Cheol (Research Institute of Marine Systems Engineering, Seoul National University)
Kim, Byung-Il (Division of Marine Ocean System Engineering, Mokpo National Maritime University)
Publication Information
Journal of Navigation and Port Research / v.26, no.4, 2002 , pp. 435-440 More about this Journal
Abstract
The quantitative assessment of the effect of the residual stress on fracture behavior was executed by some experiment and numerical analysis. First of all, artificial residual stresses were imposed on CT(Compact Tension) specimens by local heating using gas torch, and an appropriate distribution of residual stresses was obtained by thermal elastic-plastic FE analysis. To certify the result of the FE analysis, an experimental measurement was performed in accordance with ASTM standard. Fracture toughness test was executed on the several types of specimens. The first type was the specimen without residual stresses, and the others had different peak value of compressive residual stress at crack front via controlling the heat flux. All the test results were presented on th J resistance(JR) curves and discussed to verify the effect of compressive residual stresses on fracture behavior.
Keywords
compressive residual stress; local heating; fracture toughness; $J_R$ curve; thermal elastic-plastic analysis;
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  • Reference
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