Zheng -Hirt Formula and Its Appliance in Failure Analysis
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V215. 5+2
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Abstract:
As an examole of analysing the fatigue crack of wing spar in type-5 Fighter - Trainer ，the methods of crack propagation life prediction by means of fractography and Zheng - Hirt formula are ntrodued in this paper.Some useful study was carried out for predetermined servive life of old fighters.
