The effect, on the residual stress measurement accuracy, of the drilling speed of the end-mill during the hole-drilling measurements was evaluated in Ti6A14V. In spite of the well-known consideration that the highest achievable speed should be used during hole drilling, very few experimental works exist analyzing the effects of using lower velocities. Hole-drilling experiments were performed in this study by measuring the released strain by electronic speckle pattern interferometry. A known stress state was generated by loading the sample in a four point bending frame up to 50% of the yield strength. Drilling speed ranging in 5,000 ÷ 50,000 rpm was investigated by using an electronically controlled mill. The expected stress field, evaluated by a numerical model in ANSYS®, was compared with the measured one at different drilling speeds.
Drilling Speed Effects On Accuracy Of HD Residual Stress Measurements / Barile, C; Casavola, C; Pappalettera, G; Pappalettere, C; Tursi, F.. - STAMPA. - (2014), pp. 119-125. (Intervento presentato al convegno Annual Conference on Experimental and Applied Mechanics, 2013 tenutosi a Lombard, IL nel June 3-5, 2013) [10.1007/978-3-319-00876-9_15].
Drilling Speed Effects On Accuracy Of HD Residual Stress Measurements
Barile, C;Casavola, C;Pappalettera, G;Pappalettere, C;Tursi, F.
2014-01-01
Abstract
The effect, on the residual stress measurement accuracy, of the drilling speed of the end-mill during the hole-drilling measurements was evaluated in Ti6A14V. In spite of the well-known consideration that the highest achievable speed should be used during hole drilling, very few experimental works exist analyzing the effects of using lower velocities. Hole-drilling experiments were performed in this study by measuring the released strain by electronic speckle pattern interferometry. A known stress state was generated by loading the sample in a four point bending frame up to 50% of the yield strength. Drilling speed ranging in 5,000 ÷ 50,000 rpm was investigated by using an electronically controlled mill. The expected stress field, evaluated by a numerical model in ANSYS®, was compared with the measured one at different drilling speeds.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
