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| FORMULATION OF RESIDUAL STRESS INTENSITY FACTOR IN DCB SPECIMEN OF Al ALLOY |
| QIAN Yourong; CHEN Zailiang (Beijing Institute of Aeronautics and Astronautics) |
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Cite this article:
QIAN Yourong; CHEN Zailiang (Beijing Institute of Aeronautics and Astronautics). FORMULATION OF RESIDUAL STRESS INTENSITY FACTOR IN DCB SPECIMEN OF Al ALLOY. Acta Metall Sin, 1983, 19(5): 86-91.
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Abstract The verified formulation for determining the residual stress intensity factor (SIF) in the DCB specimen was deduced as below:K_(IR)=Eφh h~(1/2)/2 3~(1/2)which can be easily got by measuring the curvature φ of the half-specimen and does not vary with the crack propagation. It was found that the value K_(IR) for LC4 Al alloy is markedly influenced by the aging temperature, e.g., below 120℃, its K_(IR)>K_(ISCC), the residual SIF can not be effectively dissipated, and its K_(IR) may be much lowered only by an additional fractional aging up to 160℃. The influence of the heat treatment upon the value K_(IR) of LC4 Al alloy has been described.
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Received: 18 May 1983
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1 Hyatt, M. V., Corrosion, 26 (1970) , 547．
2 Johnson, L. G., Ind. Math., 5 (1955) , 7．
3 Mostovoy, S.; Crosley, P. B.; Ripling, E. J., J. Mater., 2 (1967) , 661．
4 未发表材料.{ |
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