单脉冲载荷下伪弹性TiNi合金圆柱壳的响应特性分析

李丹;唐志平;陶俊林

振动与冲击 ›› 2012, Vol. 31 ›› Issue (16) : 98-103.

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PDF(2622 KB)
振动与冲击 ›› 2012, Vol. 31 ›› Issue (16) : 98-103.
论文

单脉冲载荷下伪弹性TiNi合金圆柱壳的响应特性分析

  • 李丹1 ,唐志平2,陶俊林1
作者信息 +

Response of TiNi cylindrical shells for single wave pulse loading

  • LI Dan , TANG Zhi-ping , TAO Jun-lin
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摘要

摘 要:以工程中广泛使用的基本构件-圆柱薄壳结构作为研究对象,利用改进的分离式Hopkinson压杆装置,对不同长径比的PE相变柱壳进行了较为系统的单脉冲轴向加载冲击实验。通过对相变柱壳高速CCD摄影及局部轴向应变的测试发现:不同长径比呈现出不同的屈曲模态。相变柱壳中的相变铰具有以下特点:①可回复性;②出现相变铰的时间尺度为微秒量级,与波动效应耦合在一起,变形呈现波动性;③多相变铰形成,包括周向相变铰,轴向相变铰,斜相变铰。

Abstract


Abstract: Experimental tests were conducted on pseudo-elastic phase transformation cylindrical shells (PTCSs) with different LDR under single pulse loading using a modified split Hopkinson pressure bar (SHPB) apparatus. It was found that PTCSs with different LDR have different buckling modes by the high speed camera and loacal strain measured by the strain gauges. The PTH of the PTCS is characterized by the following: 1.Recoverability; 2.the phase transformation hinge appears on the microsecond-grade time that is coupled with the fluctuation effect and its deformation is fluctuant; 3.there are a number of PTHs in the PTCS under impact loading, including circumferential phase transformation hinges, axial phase transformation hinge, diagonal transformation hinge.

关键词

单脉冲加载 / 相变柱壳 / 相变铰 / TiNi合金 / 伪弹性

Key words

Single pulse loading / Phase transformation cylindrical shell / Phase transformation hinge / TiNi alloys / Pseudo-elastic

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导出引用
李丹;唐志平;陶俊林. 单脉冲载荷下伪弹性TiNi合金圆柱壳的响应特性分析[J]. 振动与冲击, 2012, 31(16): 98-103
LI Dan;TANG Zhi-ping;TAO Jun-lin. Response of TiNi cylindrical shells for single wave pulse loading[J]. Journal of Vibration and Shock, 2012, 31(16): 98-103

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