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俎政,原天宇,汤双双,等. 蜂窝夹芯板多次低速冲击及冲击后剩余强度[J]. 科学技术与工程, 2019, 19(28): 101-109.
Zu Zheng,Yuan Tianyu,Tang Shuangshuang,et al.Analysis of Repeated Low Velocity Impacts on Honeycomb Sandwich Panels and Residual Strength after Impacts[J].Science Technology and Engineering,2019,19(28):101-109.
蜂窝夹芯板多次低速冲击及冲击后剩余强度
Analysis of Repeated Low Velocity Impacts on Honeycomb Sandwich Panels and Residual Strength after Impacts
投稿时间:2019-03-21  修订日期:2019-05-05
DOI:
中文关键词:  蜂窝夹芯板 多次冲击 剩余强度 数字图像相关
英文关键词:honeycomb sandwich panels repeated impacts residual strength digital image correlation
基金项目:国家自然科学基金项目(面上项目,重点项目,重大项目)
           
作者单位
俎政 山东理工大学交通与车辆工程学院
原天宇 山东理工大学交通与车辆工程学院
汤双双 山东理工大学交通与车辆工程学院
代祥俊 山东理工大学交通与车辆工程学院
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中文摘要:
      蜂窝夹芯板因其较好的吸能效果得到广泛应用。蜂窝夹芯板在服役期间常会受到多次冲击,受损蜂窝夹芯板的剩余强度为其能否继续服役提供有效的参考。为研究蜂窝夹芯板多次低速冲击及冲击后蜂窝夹芯板的剩余强度,本文对蜂窝夹芯板同一位置进行不同能量、不同频次冲击的实验研究,实验表明,相同冲击总能量下,单次高能量冲击比多次低能量冲击所产生的损伤大。采用ABAQUS软件对冲击实验进行仿真计算,将计算结果与实验结果进行对比,结果表明,仿真计算的接触力最大值与实验的接触力最大值较为接近。对含损伤的蜂窝夹芯板进行了压缩剩余强度实验,结合数字图像相关方法同时对蜂窝板两侧凹坑附近的应变进行测量,结果表明,单次高能量冲击的剩余强度比多次低能量冲击的剩余强度低,在压缩过程中,凹坑处应变变化较明显,远离凹坑处的应变变化较小。
英文摘要:
      Honeycomb sandwich panels are widely used due to their better energy absorption. Honeycomb sandwich panels are often subjected to repeated impacts during service, and the residual strength of damaged honeycomb sandwich panels provides an effective reference for their continued service. In order to study repeated low velocity impacts on honeycomb sandwich panels and residual strength after impacts,the impacts of different energy and different frequency at the same position on honeycomb sandwich panels was studied in this paper. Experiments show that a single high-energy impact is more harmful than repeated low-energy impacts under the same total impact energy. The impacts experiment was simulated by ABAQUS software, and the calculation results were compared with the experiment results. The results show that the maximum contact force calculated by the simulation is close to the maximum contact force of the experiment. The residual strength experiment of the honeycomb sandwich panel with damage was carried out, and the strain near the pits on both sides of the honeycomb panel was measured simultaneously with the digital image correlation method. The results show that the residual strength of a single high-energy impact is lower than the residual strength of repeated low-energy impacts. During the compression process, the strain at the pit changes significantly, and the strain away from the pit region changes small.
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