Journal of Failure Analysis and Prevention

, Volume 15, Issue 1, pp 101–121 | Cite as

A Study on the Intralaminar Damage and Interlaminar Delamination of Carbon Fiber Composite Laminates Under Three-Point Bending Using Acoustic Emission

  • P. F. Liu
  • J. Yang
  • B. Wang
  • Z. F. Zhou
  • J. Y. Zheng
Technical Article---Peer-Reviewed

Abstract

The complicated failure mechanisms are always distinct features of composite materials which largely affect the stiffness and strength as well as the structural integrity. Yet, until now there are still no mature methods based on various test approaches for accurately predicting the failure mechanisms and damage evolution behaviors of composite structures by considering the effects of loads, environments, and material defects. This research designs and prepares the [0°16//0°16], [30°16//30°16], and [15°/−15°]3s//[15°/−15°]3s carbon fiber composite specimens with initial interlaminar cracks, and performs the single-leg and over-leg three-point bending mechanical experiments and acoustic emission (AE) tests of composite specimens under 70 °C temperature. The effects of the layup patterns, the loading conditions, and the initial interlaminar crack length on the intralaminar damage and interlaminar delamination behaviors of composite laminates are comparatively studied by analyzing the response process of the AE characteristic parameters including the amplitude, energy, and counting. The AE analysis provides theoretical and technique support for further elucidating the complicated failure mechanisms and their interactions of carbon fiber composite laminates.

Keywords

Carbon fiber composite laminates Intralaminar damage and interlaminar delamination Acoustic emission (AE) test Single-leg three-point bending (SLB) and over-leg three-point bending (OLB) 

Notes

Acknowledgments

The author Dr. Pengfei Liu would sincerely like to thank the support by the National Natural Science Funding of China (No.51375435), and the National Key Fundamental Research and Development Project (973 Project, No. 2015CB057603), the Natural Science Funding of Zhejiang Province of China (No. LY13E050002) and the Aerospace Support Technique and Innovation Funding.

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Copyright information

© ASM International 2014

Authors and Affiliations

  • P. F. Liu
    • 1
  • J. Yang
    • 1
  • B. Wang
    • 2
  • Z. F. Zhou
    • 3
  • J. Y. Zheng
    • 1
  1. 1.Institute of Chemical Machinery and Process EquipmentZhejiang UniversityHangzhouChina
  2. 2.Hangzhou Special Equipment Inspection InstituteHangzhouChina
  3. 3.Engineering DivisionZhejiang University City CollegeHangzhouChina

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