Computerized Tomography and C-Scan for Measuring Drilling-Induced Delamination in Composite Material Using Twist Drill and Core Drill


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Delamination is one of the most concern defects in drilling of composite material. Delamination depends on the factors such as feed rate, tool geometry and wear. The mechanics of drilling composite materials has been examined along with the quality of the hole and the effect of tool design parameters. The capacity of computerized tomography (CT) showing sample cross-section in a nondestructive way made it successful in measuring the drilling-induced delamination. In the experiment, the correlation between thrust force and the measured delamination extent in use of twist drill and core drill is illustrated and compared with the known ultrasonic C-scan. It is compared with the ultrasonic technique and is demonstrated a feasible and an effective tool for the evaluation of drilling-induced delamination.



Edited by:

Shen Dong and Yingxue Yao




H. Hocheng and C. C. Tsao, "Computerized Tomography and C-Scan for Measuring Drilling-Induced Delamination in Composite Material Using Twist Drill and Core Drill", Key Engineering Materials, Vol. 339, pp. 16-20, 2007

Online since:

May 2007




[1] W. Koenig, C. Wulf, P. Grass and H. Willerscheid: Ann. CIRP, Vol. 34 (1985) No. 2, p.536.

[2] J.H. Doran and C.R. Maikish, in: Composite Materials in Engineering Design (edited by B.R. Noton, ASM Press 1973).

[3] A. Koplev, A. Lystrup and P. Vorm: Compos., Vol. 14 (1983) No. 2, p.371.

[4] K. Sakuma, Y. Yokoo and M. Seto: Bull. Jpn. Soc. Mech. Prec. Eng., Vol. 27 (1984) No. 228, p.1237.

[5] F. Veniali, A. Llio and V. Tagliaferri: ASME J. Energ. Res. Technol., Vol. 117 (1995), p.271.

[6] D.F. Galloway: ASME, Vol. 79 (1957), p.191.

[7] W.R. Russell : ASTME Paper, No. 397 (1962), p.62.

[8] S. Jain and D.C.H. Yang, in: Proc. Manuf. Compos. Mater. PED-49/MD-27 (1991), p.37.

[9] J.A. Miller: Am. Mach. Auto. Manuf, Vol. 131 (1987) No. 10, p.70.

[10] W. Koenig, P. Grass, A. Heintze, F. Okcu and C. Schmitz-justin: Prod. Eng., Vol. 9 (1984), p.56.

[11] S.M. Wu and J.M. Shen: ASME J. Eng, Ind., Vol. 105 (1983), p.173.

[12] W.A. Haggerty and H. Ernst: ASTE Paper, (1958) No. 101, p.58.

[13] S.L. Ko, J.E. Chang and G.E. Yang: J. Mater. Process. Technol., Vol. 140 (2003), p.237.

[14] S. Jain and D.C.H. Yang, in: ASME Mater. Div. Publ. MD Anaheim (1992), p.45.

[15] H. Hocheng and C.C. Tsao: J. Mater. Process. Technol., Vol. 167 (2005), p.251.

[16] C.C. Tsao and H. Hocheng: Int. J. Mach. Tools Manuf., Vol. 44 (2004) No. 10, p.1085.

[17] S.R. Ravishankar and C.R.L. Murthy: NDT E Int., Vol. 30 (1997) No. 2, p.113.

[18] H. Hocheng and C.K.H. Dharan: ASME J. Eng. Ind., Vol. 112 (1990), p.236.