Progressive Fracture Evaluation in Composite Materials by Acoustic Emission Technique

Abstract:

Glass/polyester and glass/epoxy laminated composites widely used in structures and have very near properties. These composite laminates have poor inter-laminar fracture resistance and suffer extensive damage by delamination cracking when subjected to out of plane loading and hence are vulnerable to delamination. The presence of delamination in the composite material may reduce the overall stiffness. Structural design and nondestructive test techniques have evolved as increased emphasis has been placed on the durability and damage tolerance of these materials. There are several methods used to investigate damages of composite materials. Acoustic emission is one of these. In this work the effect of delamination propagation on acoustic emission (AE) events in glass/polyester and glass/epoxy composites is obtained also Fracture surface examinations were conducted using a scanning electron microscope (SEM) and results in these two common composites compared. Consequently, revealed that the AE technique is a practicable and effective tool for identifying and separating kinds of cracks in these composites.

• Periodical: Key Engineering Materials (Volume 465)
• Pages: 535-538
• DOI: https://doi.org/10.4028/www.scientific.net/KEM.465.535
• Online since: January 2011
• Authors: Milad Hajikhani, Amir Refahi Oskouei, Mehdi Ahmadi Najaf Abadi, Amir Sharifi, Mohammad Heidari
• Keywords: Acoustic Emission (AE), Composite, Delamination, Glass/Epoxy, Glass/Polyester

References

[1] Chai H., 1984, Composites; 15(4): 277–90.

[2] M. R. Piggot, 1991, Compos. Sci Tech, 42, 57.

[3] J. M. Whitney, C. E. Browning, and W. Hoogsteden, J. Rein$ Plat., 1982, Compos., 1, 297.

[4] ISO 15024: (2001).

[5] JIS K 7086: (1993).

[6] Choi NS, Kinloch AJ, Williams JG., 1999, J Compos Mater; 33: 73–100.

[7] Robinson P, Song DQ. , 1992, J Compos Mater; 26: 1554–77.

[8] Kinloch AJ, Wang Y, Williams JG, Yayla P., 1993, Compos Sci Technol; 47: 225–37.

[9] Ozdil F, Carlsson LA., 1999, Compos Sci Technol; 59: 937–45.

[10] Lucas JP., 1992, Eng Fract Mech; 42(3): 543–61.

[11] Briscoe BJ, Court RS, Williams DR., 1993, Compos Sci Technol; 47: 261–70.

[12] Alif N, Carlsson LA, Boogh L., 1998, Compos Part B; 29(5): 603–11.

[13] G. Minak and A. Zucchelli, In: Composite Materials Research Progress, edited by L.P. Durand Nova Science Publishers (2008).