Open Access Open Access  Restricted Access Subscription Access

Effects of Surface Characteristics on Mechanical and Dielectric Properties of Adhesively Bonded Carbon Fiber Composites

MINHAZUR RAHMAN, GAYATHRI KOLA, MONJUR MORSHED RABBY, MUTHU RAM PRABHU ELENCHEZHIAN, RELEBOHILE GEORGE QHOBOSHEANE, VAMSEE VADLAMUDI, KENNETH REIFSNIDER, RASSEL RAIHAN

Abstract


The rapid rise of fiber reinforced composite usage in aircraft, spacecraft and automobile industries made the proper comprehension of repair and joining of these materials a crucial aspect. Adhesive bonding is one of the most advantageous and desirable joining and repair technique for fiber reinforced composites. However, the heterogeneity of fiber reinforced composites and the complex interfacial nature of the adhesive bonds, makes most non-destructive evaluation and assessment techniques ineffective to assess the state of the bond. Different manufacturing and surface preparation techniques impart different surface characteristics to the adherends, hence proper understanding of the state of bonds is dependent upon the characteristics of the adherend surfaces. In this approach, carbon fiber composite adherends with controlled surface modifications were made into lap-shear test specimens using film adhesive. The effects of surface characteristics such as surface roughness and surface free energy of the adherend surfaces, on bond performance are studied. These surface characteristics are found to be an indicator of bond performance and can even be used to explain failure modes. Moreover, the performance of these bonds with varying surface characteristics are analyzed non-destructively by dielectric spectroscopy and compared with the mechanical performance of the bonds.


DOI
10.12783/asc36/35836

Full Text:

PDF

References


B. N. J. Persson and M. Scaraggi, “Theory of adhesion: Role of surface

roughness,” J. Chem. Phys., vol. 141, no. 12, 2014, doi: 10.1063/1.4895789.

M. D. Bukhari et al., “Adhesion Theories and Effect of Surface Roughness on

Energy Estimation and Wettability of Polymeric Composites Bonded Joints: AReview,”

VW Appl. Sci., vol. 2, no. 1, pp. 74–86, 2019, doi:

36297/vw.applsci.v2i1.37.

B. Ehrhart, B. Valeske, C. Muller, and C. Bockenheimer, “Methods for the

Quality Assessment of Adhesive Bonded CFRP Structures - A Resumé,” 2010.

[Online].

B. Yılmaz and E. Jasiūnienė, “Advanced ultrasonic NDT for weak bond

detection in composite-adhesive bonded structures,” Int. J. Adhes. Adhes., vol.

, 2020, doi: 10.1016/j.ijadhadh.2020.102675.

R. Raihan, J. M. Adkins, J. Baker, F. Rabbi, and K. Reifsnider, “Relationship of

dielectric property change to composite material state degradation,” Compos.

Sci. Technol., vol. 105, pp. 160–165, 2014, doi:

1016/j.compscitech.2014.09.017.

K. Reifsnider, M. R. Raihan, V. Vadlamudi, and M. R. P. Elenchezhian, “State

variable methods of assessment, prognosis, and control of composite and

bonded structures,” in 33rd Technical Conference of the American Society for

Composites 2018, 2018, vol. 4.

K. Reifsnider, R. Raihan, M. R. P. Elenchezhian, P. K. Banerjee, C. Dave, and

V. Vadlamudi, “Systems and Methods for Assessing the Quality of Adhesive

Bonds,” US 10,989,680 B2, 2021.

M. R. P. Elenchezhian et al., “Quality assessment of adhesive bond based on

dielectric properties,” Int. SAMPE Tech. Conf., pp. 1336–1349, 2017.

D. Nečas and P. Klapetek, “Gwyddion: An open-source software for SPM data

analysis,” Cent. Eur. J. Phys., vol. 10, no. 1, pp. 181–188, 2012, doi:

2478/s11534-011-0096-2.

M. Zenkiewicz, “Methods for the calculation of surface free energy of solids,”

J. Achiev. Mater. Manuf. Eng., vol. 24, no. 1, pp. 137–145, 2007.

D. K. Owens and R. C. Wendt, “Estimation of the surface free energy of

polymers,” J. Appl. Polym. Sci., vol. 13, no. 8, pp. 1741–1747, Aug. 1969, doi:

1002/app.1969.070130815.

F. Kremer and A. Schönhals, Broadband dielectric spectroscopy. 2003.

COMPASS, “ASTM D5868 Standard Test Method for Lap Shear Adhesion for

Fiber Reinforced Plastic ( FRP ),” 2005. doi: 10.1520/D5868-01R14.2.


Refbacks

  • There are currently no refbacks.