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剪切增稠液体的缓冲机理和力学性能 预览

Investigation of shear thickening fluid on buffer mechanism and mechanical properties
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摘要 剪切增稠液体(STF)是一种将纳米或微米级的颗粒分散到牛顿流体中而形成的非均质颗粒悬浮液。当冲击发生时,其表观黏度发生大幅度增大而变黏稠。冲击结束后,体系表观黏度降低,重新转变为液体。通过颗粒拥堵模型,解释了剪切增稠液体在冲击过程中的耗能机理,同时计算了冲击杆在冲击过程中的加速度响应。采用低速冲击试验,测试了其抗冲击特性,与传统吸能材料AV-200进行了吸能对比;结果表明:颗粒拥堵模型合理解释了低速冲击试验中出现的局部硬化现象,规避了传统方法中边界对剪切增稠液体的影响问题。剪切增稠液体具有优异的缓冲特性。理论分析结果与试验结果的良好吻合验证了理论方法的有效性。该研究为剪切增稠液体在缓冲领域的应用提供了参考。 Shear thickening fluid(STF)is a heterogeneous suspension of nanometer or micrometer particles in a non-Newtonian fluid.Because the effective viscosity increases greatly,it changes from liquid-like to solid-like while bearing an impact load.When the load is removed?it returns back to liquid-like state.A mechanical model based on particle jammed model is put forward by studying the role of added mass in the transition of the flow state.The acceleration response is also obtained from this method.Low speed impact test is used to study impact properties and compare with traditional energy absorbing material AV-200.The results show that the particle jamming model explains the local hardening phenomenon reasonably in low speed impact test and avoids the influence of boundary on shear thickening fluid in the traditional method.The shear thickening fluid possesses excellent cushioning properties.By comparing the acceleration response of impact rod from theoretical analysis with those from the experimental work,it is found that the approach proposed in this work is effective.This study lay a foundation for cushioning material by using shear thickening fluid.
作者 赵鹏 余慕春 陈前 邬照勇 ZHAO Peng;YU Mu-chun;CHEN Qian;WU Zhao-yong(State Key Laboratory of Mechanics and Control of Mechanical Structure, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, China;China Academy of Launch Vehicle Technology, Beijing 100076, China)
出处 《振动工程学报》 CSCD 北大核心 2018年第6期966-973,共8页 Journal of Vibration Engineering
基金 江苏省研究生科研与实践创新计划项目(KYCX17_0236) 江苏高校优势学科建设工程资助项目.
关键词 剪切增稠液体 低速冲击试验 缓冲效率 颗粒拥堵模型 附加质量 shear thickening fluid low speed impact test energy dissipation efficiency particle jammed model added mass
作者简介 赵鹏(1990-),男,博士研究生.电话:18052095060;E-mail:pzhao_detec@nuaa.edu.cn;通讯作者:陈前(1951-),男,教授.电话:(025)84893221;E-mail:q.chen@nuaa.edu.cn
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  • 1周小祥,陈尔奎,吕桂庆,刘立星.基于数字积分和LMS的振动加速度信号处理[J].自动化仪表,2006,27(9):51-53. 被引量:27
  • 2潘海鸿,李小清,周云飞.多轴激光位移测量同步采样技术[J].华中科技大学学报:自然科学版,2007,35(3):89-92. 被引量:6
  • 3Gentile C, Bernardini G. Output-only modal identification of a reinforced concrete bridge form radar- based measurements[J]. NDT & E International, 2008, 41: 544-553. 被引量:1
  • 4Stiros S C. Errors in velocities and displacements deduced from accelerographs: an approach based on the theory of error propagation[J]. Soil Dynamies and Earthquake Engineering, 2008, 28: 415-420. 被引量:1
  • 5Yang J, Li J, Lin G. A simple approach to integration of acceleration data for dynamic soil-structure interaction analysis[J]. Soil Dynamies and Earthquake Engineering, 2006, 26: 725-734. 被引量:1
  • 6Smyth A, Wu Meiliang. Multi-rate Kalman filtering for the data fusion of displacement and acceleration response measurements in dynamic system monitoring [J]. Mechanical Systems and Signal Processing, 2007, 21: 706-723. 被引量:1
  • 7张志涌.精通MATLAB6.[M].5版.北京:北京航空航天大学出版社,2004. 被引量:1
  • 8王选择,郭军,谢铁邦.自带计量标准器的二维位移工作台研究[J].华中科技大学学报:自然科学版,2003,31(11):53-54. 被引量:9

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