ﺑﺮرﺳﯽ ﺗﺠﺮﺑﯽ رﻓﺘﺎر ﺳﺎﺧﺘﺎرﻫﺎي اﻟﯿﺎف - ﻓﻠﺰ ﺣﺎوي ﻧﺎﻧﻮ ذرات ﺗﺤﺖ ﺿﺮﺑﻪ ﺳﺮﻋﺖ ﭘﺎﯾﯿﻦ ﻣﮑﺮر

Experimental Investigation into the Behaviour of FMLs Containing Nanoparticles under Repeated Low-velocity Impact

ﮔﻠﺮ دﺳﺘﻪ اي از ﮐﺎﻣﭙﻮزﯾﺖ ﻫﺎي اﻟﯿﺎف-ﻓﻠﺰ اﺳﺖ ﮐﻪ در آن از ورق ﻫﺎي ﺑﺎ ﺟﻨﺲ آﻟﯿﺎژ آﻟﻮﻣﯿﻨﯿﻮم، ﻫﻤﺮاه ﺑﺎ ﻟﻤﯿﻨﯿﺖ ﻫﺎي ﮐﺎﻣﭙﻮزﯾﺘﯽ ﺑﺎ ﺗﻘﻮﯾﺖ ﮐﻨﻨﺪه ﻫﺎﯾﯽ از ﺟﻨﺲ ﺷﯿﺸﻪ ﻣﻮرد اﺳﺘﻔﺎده ﻗﺮار ﻣﯽ ﮔﯿﺮد. در اﯾﻦ ﻣﻘﺎﻟﻪ، ورق ﻫﺎﯾﯽ از ﻧﻮع ﮔﻠﺮ، ﺗﺤﺖ ﺑﺎرﮔﺬاري ﺿﺮﺑﻪ ﺳﺮﻋﺖ ﭘﺎﯾﯿﻦ ﻣﮑﺮر ﺑﺎ اﻧﺮژي 150 ژول، ﻗﺮار ﮔﺮﻓﺘﻨﺪ. ﮐﺎر ﻫﺎي ﺗﺠﺮﺑﯽ ﺗﻮﺳﻂ دﺳﺘﮕﺎه ﺳﻘﻮط وزﻧﻪ، اﻧﺠﺎم ﺷﺪ. ﺑﺮاي ﺳﺎﺧﺖ ﻧﻤﻮﻧﻪ ﻫﺎ، از ورق ﻫﺎي آﻟﻮﻣﯿﻨﯿﻮم T3-2024 ﺑﺎ ﺿﺨﺎﻣﺖ 1 ﻣﯿﻠﯽ ﻣﺘﺮ ﺑﻪ ﻋﻨﻮان ﺻﻔﺤﺎت روﯾﯽ و ﻫﻤﭽﻨﯿﻦ ﻫﺴﺘﻪ از ﺟﻨﺲ ﮐﺎﻣﭙﻮزﯾﺖ ﺷﯿﺸﻪ– اﭘﻮﮐﺴﯽ اﺳﺘﻔﺎده ﺷﺪ. ﻟﻤﯿﻨﯿﺖ ﺷﯿﺸﻪ-اﭘﻮﮐﺴﯽ ﻣ رد اﺳﺘﻔﺎده ﻧﯿﺰ، ﻣﺘﺸﮑﻞ از ﭘﻨﺞ ﻻﯾﻪ اﻟﯿﺎف ﺷﯿﺸﻪ ﺗﮏ ﺟﻬﺘﻪ ﻧﻮع E در رزﯾﻦ اﭘﻮﮐﺴﯽ ﺑﻮد. ﻋﻼوه ﺑﺮ اﯾﻦ، ﻧﺎﻧﻮ ذرات ﺳﯿﻠﯿﮑﺎ ﺑﺎ ﺧﻠﻮص 99/9% ﺑﻪ ﻣﺎده زﻣﯿﻨﻪ اﺿﺎﻓﻪ ﺷﺪ. ﺑﻪ ﻣﻨﻈﻮر ﺑﺮرﺳﯽ ﺗﺄﺛﯿﺮ اﺿﺎﻓﻪ ﮐﺮدن اﯾﻦ ﻧﺎﻧﻮ ذرات ﺑﺮ رﻓﺘﺎر ﮐﺎﻣﭙﻮزﯾﺖ ﻫﺎي اﻟﯿﺎف-ﻓﻠﺰ، ﺗﺤﺖ ﺿﺮﺑﻪ ﺳﺮﻋﺖ ﭘﺎﯾﯿﻦ ﻣﮑﺮر، در ﻧﻤﻮﻧﻪ ﻫﺎي ﺳﺎﺧﺘﻪ ﺷﺪه، ﻧﺎﻧﻮ ذرات ﺳﯿﻠﯿﮑﺎ ﺑﺎ درﺻﺪ وزﻧﯽ 0 ﺗﺎ 4% ﺑﻪ ﻣﺎﺗﺮﯾﺲ اﺿﺎﻓﻪ ﺷﺪﻧﺪ. ﻧﺘﺎﯾﺞ آزﻣﺎﯾﺶ ﻫﺎ ﻧﺸﺎن داد ﮐﻪ از ﻧﻈﺮ ﻣﻘﺎوﻣﺖ ﺑ ﺿﺮﺑﻪ، ﻧﻤﻮﻧﻪ داراي 1% ﻧﺎﻧﻮ ذرات، ﻋﻤﻠﮑﺮد ﺑﻬﺘﺮي از ﺧﻮد ﻧﺸﺎن داد، ﺑﻪ ﻃﻮري ﮐﻪ ﭘﺲ از ﭘﻨﺞ ﻣﺮﺗﺒﻪ اﻋﻤﺎل ﺑﺎر، آﺳﯿﺐ ﺟﺪي در آن اﯾﺠﺎد ﻧﺸﺪ؛ اﻣﺎ در ﻧﻤﻮﻧﻪ ﻫﺎي داراي 3% و 4% ﻧﺎﻧﻮذره، در ﻣﺮﺣﻠﻪ دوم اﻋﻤﺎل ﺑﺎر، ﺳﻮراخ ﺷﺪﮔﯽ در اﺗﻔﺎق اﻓﺘﺎد.

GLARE is a kind of fiber-metal composites in which aluminum alloy sheets are used, along with composite laminates with glass reinforcements. In this paper, Glare FMLs were subjected to repeated low-velocity impact loading with an energy of 150 J. Repeated low-velocity impacts were applied using a drop-weight testing machine. To fabricate testing specimens, 2024-T3 aluminum alloy plates with a thickness of 1 mm as the face-sheets as well as the core made of the glass-epoxy composite were used. The epoxy glass laminate used also consisted of five layers of E-type single-sided glass fibers in the epoxy resin. Besides, 99.9% purity silica nanoparticles were added to the base material. To investigate the effect of adding nanoparticles on the behavior of FMLs under repeated low-velocity impacts, silica nanoparticles with a weight percentage of 0 to 4% were added to the matrix of the fabricated samples. The experimental results showed that the sample with 1% nanoparticles had better performance in terms of impact resistance so that after five loads, it was not seriously damaged; however, the perforation phenomenon occurred for samples with 3% and 4% nanoparticles in the second impact load.