Experimental method for and defect tolerance of fixed plate theoretical research on based on damage mechanics |
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| Authors: | Zhan Zhixin Hu Weiping Zhang Miao Zhli Yuefa Meng Qingchun |
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| Institution: | [1]Institute of Solid Mechanics, School of Aeronautic Science and Engineering, BeiHang University, Beijing 100191, China [2]Institute of Manned Space System Engineering, China Academy of Space Technology, Beijing 100094, China [3]Harbin Aircraft Manufacturing Company, Harbin 150060, China |
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| Abstract: | An experimental method and a theoretical analysis based on continuum damage mechanics are applied for the defects tolerance of fixed plate. The defects type studied in this article is scratch, which is considered a typical defect on fixed plate according to the engineering practice. The general approach to the defects tolerance analysis of scratched fixed plate is presented. The method of fatigue life prediction for standard notched specimens has been established on the basis of continuum damage mechanics. For the purpose of obtaining the influence law of fatigue life in consequence of scratches, fatigue experiments of standard notched specimens and scratched specimens have been done. Evaluation of the fatigue life of scratched fixed plate has been carried out. And the value of scratch defects permissible to the condition of safety service life has been worked out. According to the results of theoretical calculations, the fatigue experiment of scratched fixed plate has been performed. The outcome shows that the theoretical prediction tallies with the experimental results. |
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| Keywords: | Damage mechanics Defect tolerance Fatigue experiment Fixed plate Life prediction |
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