Comparison between quasi-static indentation testing and drop-weight impact testing on delamination onset damage
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摘要: 为了研究复合材料层合板的分层起始载荷,对不同材料体系和不同铺层数的复合材料层合板进行了准静态压痕试验和落锤冲击试验.得到了复合材料层板的分层起始载荷和冲击分层损伤能量门槛值,并对损伤情况进行了分析.结果表明,层合板的落锤冲击试验的分层起始载荷与冲击能级有关,并且分层起始载荷值随冲击能级提高而增加;准静态压痕试验的分层起始载荷值要低于低速冲击试验的分层起始载荷值;当冲击能量达到层板分层损伤能量门槛值时,层板发生大量分层损伤,层合板刚度出现急剧下降.Abstract: To discuss the delamination onset load, quasi-static indentation tests and drop-weight impact tests were performed. The effects of the material and plying pattern on the delamination onset load were also studied. Moreover, the delamination threshold energy levels were found and the corresponding damage was analyzed. The results show that the delamination onset load increases along with the impact energy, and the delamination onset load in the quasi-static indentation is lower than in the low-velocity impact. Massive delamination happens in laminate panels when the energy reaches the delamination threshold energy, and the rigidity descends rapidly.
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Key words:
- quasi-static indentation /
- low-velocity impact /
- delamination onset load
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