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Low-velocity impact perforation response of titanium/composite laminates: analytical and experimental investigation
被引:9
|作者:
Sharma, Ankush
[1
]
Ramachandran, Velmurugan
[1
]
机构:
[1] Indian Inst Technol Madras, Dept Aerosp Engn, Chennai 600036, Tamil Nadu, India
关键词:
Keywords;
Titanium-based FMLs;
low-velocity impact;
analytical modeling;
strain energy;
perforation;
METAL LAYER DISTRIBUTION;
FIBER;
GLARE;
DAMAGE;
RESISTANCE;
BEHAVIOR;
FATIGUE;
PLATES;
D O I:
10.1080/15397734.2021.1992778
中图分类号:
O3 [力学];
学科分类号:
08 ;
0801 ;
摘要:
The low-velocity impact perforation behavior of fiber-metal laminates (FMLs) is evaluated by analytical modeling. Four different FML layups consisting of glass fiber/epoxy layers and titanium alloy Ti-6Al-4V sheets are fabricated, exhibiting the same thickness of total metal layers. The perforation behavior, threshold, and energy absorption mechanisms of FMLs are assessed using a mass-spring system. The results indicate that the elastic-plastic force history of FMLs up to maximum force predicted by both membrane and bending strain energy (M & B) and membrane strain energy only (M only) is found to be in good agreement with experiments, with M only matches closely than both M & B. The principal part of the total energy absorption of FMLs with both M & B and M only accounts for the energy absorption associated with global deformation of titanium and glass/epoxy layers, which is 67-71% and 65-69%, respectively. Here, a higher percentage of energy is absorbed by FML 4/3-0.3, succeeding by FMLs 3/2-0.3(O), 3/2-0.4, and 2/1-0.6. The predicted perforation threshold and overall energy absorption by various damage mechanisms of FMLs are in good comparison with experiments. The perforation response has also been predicted for aluminum-based FMLs, agreeing well with experiments. This insists on the robustness of the offered model. Also, the perforation resistance seems to be higher for titanium-based FMLs than aluminum-based FMLs. The overall energy absorption seems to be higher for titanium-based FMLs under low-velocity impact than high-velocity impact. This is also observed in the case of aluminum-based FMLs.
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页码:5179 / 5212
页数:34
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