Diffusion-bonded titanium hollow warren structures have been successfully applied in aircraft engine components, such as fan\nblade, and OGV, while the optimal design of the hollow warren structure to improve its impact resistance, especially under birdstrike\nevent, has been a challenge. In this work, a series of impact tests and numerical simulations are carried out to investigate\nthe effect of key geometric features on the overall impact strength of a panel-shaped titanium hollow warren structure. Based on\nexperimental and numerical studies, a quantitative relationship between diffusion bonding seam strength and the overall impact\nstrength is developed.Meanwhile, key geometric factors affecting the resultant bonding seam strength for a typical manufacturing\nprocess are identified. This work provides useful references for the optimal design to increase impact resistance for aircraft engine\nhollow warren structure components.
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