|
Title |
Effect of Different Energy Frames on the Impact Velocity of Strain Energy Frame Impact Machine
|
|
Authors |
박승훈(PARK Seung Hun) ; 박준길(PARK Jun Kil) ; 트란투안키엣(TRAN Tuan Kiet) ; 김동주(KIM Dong Joo) |
|
DOI |
http://dx.doi.org/10.4334/JKCI.2015.27.4.363 |
|
Keywords |
HPFRCCs ; 인장 응력-변형률 선도 ; 탄성변형 에너지 ; 에너지 프레임 ; 변형률 속도 HPFRCCs ; Tensile stress-strain curve ; Elastic strain energy ; Energy frame ; Strain rate |
|
Abstract |
This research investigated the effects of diameter and material of energy frame on the impact velocity or strain rate of Strain Energy Frame Impact Machine (SEFIM). The impact speed of SEFIM have been clearly affected by changing the diameter and material of the energy frame. The reduced diameter of the energy frame clearly increased the impact velocity owing to the higher strain at the moment of coupler breakage. And, titanium alloy energy frame produced the fastest speed of impact among three materials including steel, aluminum and titanium alloys because titanium alloy has faster wave velocity than steel. But, aluminium energy frame was broken during impact tests. In addition, the tensile stress versus strain response of high performance fiber reinforced cementitious composites at higher and wider strain rates between 10 and 72 /sec was successfully obtained by using four different energy frames.
|