| 单脉冲载荷下伪弹性TiNi合金圆柱壳的响应特性分析 |
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| 引用本文： | 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. |
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| 作者姓名： | 李丹 唐志平 陶俊林 |
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| 作者单位： | 1.西南科技大学土木工程与建筑学院 力学教研室 四川绵阳 621010；2. 中国科学技术大学近代力学系,合肥 230027 |
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| 基金项目： | 国家自然科学基金资助项目 |
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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。
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| 关 键 词： | 单脉冲加载 相变柱壳 相变铰 TiNi合金 伪弹性 |
| 收稿时间： | 2011-4-11 |
| 修稿时间： | 2011-9-9 |
Response of TiNi cylindrical shells under single wave pulse loading |
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| LI Dan
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TANG Zhi-ping
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TAO Jun-lin.Response of TiNi cylindrical shells under single wave pulse loading[J].Journal of Vibration and Shock,2012,31(16):98-103. |
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| Authors: | LI Dan TANG Zhi-ping TAO Jun-lin |
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| Affiliation: | School of Civil Engineering and Architecture, Southwest University of Science and Technology, Mianyang, Sichuan 621010, China; Modern Mechanics Department, University of Science and Technology of China, Hefei 230027, China |
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| Abstract: | Pseudo-elastic phase transformation cylindrical shells(PTCSs) with different length to diameter ratio(LDR) under single pulse loading were tested by using a modified split Hopkinson pressure bar(SHPB) apparatus.It is found that PTCSs with different LDR have different buckling modes and local strains,which can be measured by high speed camera and strain gauges respectively.The phase transformation hinge(PTH) of PTCS is characterized by the following:1.recoverability;2.PTH appears with a microsecond-grade time duration.It is coupled with the fluctuation effect and its deformation is fluctuant;3.there are a number of PTHs in PTCS under impact loading,including circumferential phase transformation hinge,axial phase transformation hinge and diagonal transformation hinge. |
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| Keywords: | single pulse loading phase transformation cylindrical shell phase transformation hinge TiNi alloy pseudo-elasticity |
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