1.Aviation Key Laboratory of Science and Technology on Structures Impact Dynamics, China Aircraft Strength Research Institute, Xi’an 710065, China;
2.Jiangsu Key Laboratory of Advanced Metallic Materials, School of Material Science and Engineering, Southeast University, Nanjing 210096, China
In order to explore the mechanical properties and energy absorption characteristics of closed cell aluminum foam after adding short fibers, a kind of fiber reinforced aluminum foam was prepared by adding short carbon fibers into molted aluminum by the melt foaming method.The dynamic mechanical properties of the aluminum foam and fiber reinforced aluminum foam at quasi-static and medium strain rates(0.001-100 s-1) were tested at room temperature by means of the universal material testing machine and the high speed hydraulic servo material testing machine.The mechanical properties and energy absorption characteristics of the aluminum foam with different fiber length and fiber content were analyzed.The results show that there are three different forms of fibers in aluminum foam: penetrating mode, penetration mode and embedding mode.Adding 1 mm fibers into the aluminum foam test piece with an average pore size of 2 mm, most of the fibers show penetrating mode, and the overall performance of the aluminum foam decreases.Adding 3 mm fibers, most fibers show penetration and embedding mode, and the platform stress and energy absorption efficiency increase.With the fiber, the aluminum foam presents more obvious strain rate effect.
郭亚周1，刘小川1，白春玉1，何思渊2，王计真1. 短纤维对泡沫铝压缩力学性能与吸能特性的影响研究[J]. 振动与冲击, 2021, 40(2): 57-62.
GUO Yazhou1，LIU Xiaochuan1，BAI Chunyu1，HE Siyuan2，WANG Jizhen1. Effect of short fibers on compressive mechanical properties and energy absorption properties of aluminum foam. JOURNAL OF VIBRATION AND SHOCK, 2021, 40(2): 57-62.
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