Title: Finite element-based study of unidirectional CFRP drilling temperature field

Authors: Hualin Zheng; Zhiwei Hu; Guixin Wang

Addresses: School of Mechatronic Engineering, Southwest Petroleum University, Chengdu, China ' School of Mechatronic Engineering, Southwest Petroleum University, Chengdu, China ' School of Mechatronic Engineering, Southwest Petroleum University, Chengdu, China

Abstract: Carbon fibre reinforced resin matrix composite (CFRP) exhibits anisotropy and low thermal conductivity, which facilitates the accumulation of heat produced during drilling. At the hole outlet, the temperature is even higher than the glass transition temperature (T_g) of the resin matrix, which is very easy to produce processing damage. In this research, the drilling temperature field model of unidirectional CFRP was established using ABAQUS, and its accuracy was confirmed experimentally. The model is used to examine the temperature fluctuation of the hole wall during drilling. The effect of the high temperature (greater than T_g) on the delamination damage, as well as the influence of the processing parameters on the region where the outlet temperature is higher than T_g. The findings indicate that the temperature of the hole wall is directly linked to the fibre cutting angle. The delamination damage is aggravated in the area where the temperature at the hole outlet is higher than T_g. The region where the outlet plane temperature is greater than T_g increases as spindle speed increases, whereas it decreases as feed speed increases.

Keywords: CFRP; drilling; temperature field; hole wall temperature; glass transition temperature.

DOI: 10.1504/IJMMM.2024.137423

International Journal of Machining and Machinability of Materials, 2024 Vol.26 No.1, pp.1 - 18

Received: 19 Oct 2022
Accepted: 01 Jan 2023
Published online: 18 Mar 2024 *