Study on Damage Introducing Technology for T800 Composite Laminates
This article conducts comparative studies on multiple low-velocity impact damage,quasi-static indentation damage,and final residual strength of T800 carbon fiber reinforced composite materials,in order to propose an efficient method for introducing damage to composite materials.Firstly,the damage was introduced by multiple impact,and static indentation damage introduction tests.When reaching the target pit depth,the mechanism and mode of damage caused by different damage introd ucing methods were analyzed through visual observation and ultrasonic C-scan analysis.Secondly,compressive residual strength testing was conducted on the specimen that had reached the target pit depth.Then the relationship between different damage introduction methods,different pit depths,different damage areas,and residual strength was analyzed.The residual strength testing process was monitored through DIC and acoustic emission systems to determine the damage evolution process and mechanism of specimens with different damage introducing methods during compression.Through the above research,and efficient damage introducing method has been obtained.
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