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汽车安全与节能学报 ›› 2015, Vol. 6 ›› Issue (04): 371-378.DOI: 10.3969/j.issn.1674-8484.2015.04.010

• 汽车安全 • 上一篇    下一篇

基于超高速成像和惯性效应的冲击测试技术

朱海斌1,2，PIERRON Fabrice 1，潘 兵2   

  1. 1. 南安普顿大学 工程与环境系，南安普顿 SO171BJ，英国；
    2. 北京航空航天大学 固体力学所，北京 100083， 中国
  • 收稿日期:2015-08-25 出版日期:2015-12-25 发布日期:2015-12-28
  • 作者简介:第一作者 / First author ： 朱海斌(1986—)，男( 汉)，湖北，博士后。E-mail: 09121859@bjtu.edu.cn
  • 基金资助:

    国家自然科学基金项目(11272032, 11322220) ；汽车安全与节能国家重点实验室开放基金项目(KF14032)

Impact test methodology based on ultra-high speed imaging and inertial effects

ZHU Haibin 1,2, PIERRON Fabrice 1, PAN Bing 2   

  1. 1. Faculty of Engineering and the Environment, University of Southampton, Southampton, SO171BJ UK;
    2. Research Centre of Solid Mechanics (RCSM), Beihang University, Beijing100083, China
  • Received:2015-08-25 Online:2015-12-25 Published:2015-12-28

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摘要：

为了利用全场测试技术测量非均匀变形场的优势，提出了一种可充分利用材料在高速冲击载
荷下的惯性效应的冲击测试方案。利用超高速全场测试技术获取试样受冲击载荷作用下的动态应变
和加速度场，结合虚场法对动态全场数据进行处理识别出材料的本构参数。从有限元仿真计算以及
惯性冲击测试两方面验证了这一方法的可行性。结果显示：惯性效应在冲击测试领域的应用大大简化
了测试设备，比如，由于不需要测试外力，所以无需Hopkinson 杆测试中的入射杆和透射杆装置；同
时也拓展了冲击试验的设计空间, 如可测试复杂形状或者软质的试样等。

关键词: 冲击测试, 全场变形测试, 高应变率, 虚场法, 网格法, 复合材料

Abstract:

A novel methodology was proposed using inertial effects at high strain rates to take advantages
of full-field measurements, especially the ability to measure the heterogeneous deformation. The acceleration
fields and the dynamic strain fields were acquired on the specimen surface under impact load by ultra-high
speed full-field measurements. Then, full-field data were processed by the virtual fields method to identify
material constitutive parameters. Both the numerical simulation and experimental tests validated the feasibility of
this methodology. The results show that the application of inertial effects for high strain rate testing can simplify
the experimental set-ups. For instance, the input and output bars in Hopkinson bar tests are not be required
anymore because of no need of any impact force measurement. Moreover, the design space for high strain rate
testing can be enlarged to the specimens with complex shape or soft texture.

Key words:  impact tests, full-field measurements, high strain rates, the virtual fields method, grid methods, composites