Journal of South China University of Technology (Natural Science Edition) ›› 2016, Vol. 44 ›› Issue (10): 57-64,80.doi: 10.3969/j.issn.1000-565X.2016.10.009

• Mechanics • Previous Articles     Next Articles

Experimental Investigation into Dynamic Response of Composite Foam Sandwich Plates Under Low-Energy Impact

HE Yan-bin1,2 YAO Xiao-hu1 CHENG Shi-chao1 LONG Shu-chang1 ZHANG Xiao-qing1   

  1. 1.School of Civil Engineering and Transportation,South China University of Technology,Guangzhou 510640,Guangdong,China; 2.Guangzhou Civil Aviation College,Guangzhou 510403,Guangdong,China
  • Received:2016-03-28 Revised:2016-06-18 Online:2016-10-25 Published:2016-09-01
  • Contact: 姚小虎(1974-)，男，教授，博士生导师，主要从事复合材料力学和冲击动力学研究 E-mail:yaoxh@scut.edu.cn
  • About author:何艳斌(1974-)，男，博士生，教授，主要从事冲击动力学研究． E-mail:heyanbin@ caac． net
  • Supported by:

    Supported by the National Natural Science Foundation of China(11472100，11372113)

PDF

406

Abstract:

Drop weight tests were carried out on the polyurethane foam and T700/3234 carbon fiber panel sandwich specimen based on the ASTM D7766/D7766M—15 experiment standard.Then,the dynamic responses of the com- posite foam sandwich plates with different foams and punches were analyzed under different impact energy.The re- sults show that (1) there exist three types of damage models for the dynamic responses; (2) as the impact energy increases,the peak impact force of the upper panel increases and reaches the peak value in lesser time,and the structure damage of the upper panel starts earlier and continuously increases,with an increase of the compression of the foam sandwich plates; (3) the upper panel of the higher density foam sandwich plates has a higher peak force value and a smaller displacement with more absorbed impact energy,and the corresponding lower panel has smaller deformation and strain with a stronger capability to resist the deformation; and (4) the punch of a smaller diameter has a stronger penetration,which can lead to a smaller upper panel strain and a larger lower panel strain.

Key words: composites, foam sandwich, low energy impact, dynamic response